Construction & DIY

Adhesive Calculator Adhesive Calculator Estimate adhesive coverage, bead length, and number of cartridges, sausages, or bags for construction, tile, panel, and anchor applications. Area Coverage (tiles, panels, sheets) Linear Beads (sealant, construction adhesive) Anchor

Advanced Construction

Asphalt Calculator Asphalt Calculator (Hot Mix Asphalt Tonnage & Cost) Estimate how many tons of hot mix asphalt (HMA) you need for driveways, parking lots, and road projects. Supports US/metric units, thickness, compaction, waste, and cost per ton. 1. Project dimensions Unit system US

Concrete Calculator Concrete Calculator – Slabs, Footings, Columns & Walls Estimate concrete volume in cubic yards or meters for slabs, footings, walls, columns, stairs and tubes. Get premix bag counts (40/60/80 lb or 20/25/30 kg) and add waste in one place. Imperial (ft, in, yd) Metric (m, cm) Slab

Concrete Quantities & Masonry

Construction

Construction & Project Layout

Cord to Cubic Feet Cord to Cubic Feet Converter Check if a firewood delivery is a full cord (128 ft³), or convert smaller stacks like face cords into cubic feet. You can also convert cubic feet back to cords. Full cord (4×4×8 = 128 ft³) Face cord (~1/3, ≈ 42.67 ft³) Half cord (64 ft³) Custom large stack (85 ft³) Cords Number of cords

Crane Lift Plan Crane Lift Plan Calculator & Checklist Plan a crane lift step-by-step: total load, radius, capacity %, rigging forces, and estimated ground bearing pressure with an exportable checklist. Preliminary planning only Does not replace engineered lift plan Safety disclaimer This tool is for preliminary planning and training only. It does not replace the crane manufacturer load chart, applicable standards (OSHA, ASME, etc.), site procedures, or a stamped engineered lift plan where required. Always have a qualified person

Decking Deck Calculator – Boards, Joists, Posts & Material Cost Estimate everything you need for a rectangular deck: deck boards, joists, beams, posts, concrete and total material cost. Supports feet or meters, multiple board sizes, spacing options and waste factor. Decking Calculator Units Imperial (ft) Metric (m) Reset Deck size Length (along boards) ft Width (across boards) ft Measure the finished deck surface, not including overhang. Deck boards Board size 5/4 × 6 (actual ~5.5"

Decking Decking Calculator: Boards, Joists, Posts & Cost Estimate everything you need for a new deck: decking boards, joists, posts, concrete, fasteners, and total material cost. Works with wood, composite, and PVC decking in imperial or metric units. Decking Material & Cost Calculator Deck dimensions Unit system Feet & inches (US) Meters (metric) Deck length (along boards) Deck width (across boards) Deck length (along boards) Deck width (across boards) Deck shape Simple rectangle Custom total area Custom deck area ft² Decking boards & layout Board profile Standard 5/4 × 6 (approx. 5.5 in

Drywall Calculator Drywall Calculator Estimate drywall sheets, screws, joint compound, and tape for one or more rooms. Supports openings, waste allowance, and both US & metric units. Units US

Drywall Drywall Calculator Estimate drywall sheets, screws, joint compound, tape, and corner bead for your walls and ceilings in one place. Project inputs Preset room type (optional) Small bedroom ~10×10 ft Medium room ~12×15 ft Single garage ~12×20 ft Room length ft m Room width ft m Wall height ft m Include ceiling? Yes, drywall walls & ceiling Walls only Ceiling only Number of standard doors Assumes 3×7 ft (0.91×2.13 m) per door. Number of standard windows Assumes 3×4 ft (0.91×1.22 m) per window. Extra opening area (optional) ft² m² Use for large patio doors, openings, etc. Drywall board options Sheet width 4 ft (1.22 m) Sheet length 8 ft (2.44 m) 10 ft (3.05 m) 12 ft (3.66 m) Waste

Excavation Calculator Excavation Calculator Estimate excavation volume, soil swell, truck loads, and cost for pads, trenches, and custom areas in both metric and imperial units. Units Feet

Fence Calculator Fence Calculator – Estimate Panels, Posts, Rails & Concrete Plan your fence like a pro. Enter your layout and spacing to instantly estimate how many panels, posts, rails, and bags of concrete you need. Fence material calculator Layout mode Single total length Multiple segments (with corners) Total fence length ft m Fence segments + Add segment Each segment ends at a corner or gate. The calculator will add a post at every segment end. ft m Reset segments Gates + Add gate Gates replace a panel and usually need two gate posts. Build type Pre-built panels Custom boards (post spacing) Panel width ft m Fence height ft m Post spacing (center-to-center) ft m Rails per bay Board width (optional, for board count) in cm If you enter board width, we’ll estimate how many pickets you need for a solid fence. Posts & concrete Post above-ground height ft m Post embed depth ft m Footing diameter in cm Concrete bag size 50 lb (~0.5 ft³) 60 lb (~0.6 ft³) 80 lb (~0.75 ft³) Waste

Flooring Flooring Calculator Estimate flooring area, waste, number of boxes, and total project cost for tile, vinyl, laminate, hardwood, and more. Supports multiple rooms, imperial/metric units, and both box-based and plank-based products. 1. Measurement units Feet

Foundation Calculator Foundation Calculator Estimate concrete volume, block count, and material cost for strip footings, pad footings, and slabs-on-grade. Supports metric and imperial units with waste and cost options. 1. Unit system Metric (m, mm) Imperial (ft, in) 2. Foundation type Strip

Furniture Layout Calculator Furniture Layout Calculator & Room Planner Design your room to scale, drag and rotate furniture, and instantly check clearances and walking paths. 1. Room size & units Units Feet Meters Room length ft Room width ft Tip: Start with the inside dimensions of the room (wall to wall). Doors and windows can be added as notes. Current scale: 1 square = 2 ft 2. Add furniture Sofa Loveseat Armchair Coffee table TV stand Dining table Queen bed King bed Desk Wardrobe 3. Arrange layout Drag items to move. Scroll to zoom. Hold Shift while dragging to constrain horizontally/vertically. Reset Selected item Click a furniture item on the canvas to edit its properties. Label Length ft Width ft Rotation deg From wall ft (note) Delete item Clearance checker Quick guidelines based on your layout. Add a sofa and coffee table to see seating clearance. Add a bed to check side and foot clearances. Add a dining table to check chair space. Export

General

General Construction & DIY

General Construction Calculators

Generale

Green Roof Load Calculator Green Roof Load Calculator Estimate dead load, saturated weight, and total design load of a green roof assembly and compare it to your roof capacity. This tool is for preliminary planning only. Final design and code compliance must be checked by a qualified structural engineer using project‑specific data. Green Roof Load Calculator Unit system Metric (kN/m², kg/m²) Imperial (psf, lb/ft²) Roof area m² Green roof type Extensive (shallow, sedum) Semi‑intensive Intensive (deep soil, shrubs/trees) Custom Typical saturated load: 0.8–1.5 kN/m² (17–31 psf). Growing media depth mm Depth of substrate/growing media only. Layer unit weights (saturated) Values are typical ranges from manufacturer datasheets and guidelines. Override with project‑specific data when available. Membrane + protection board kN/m² Drainage + filter layer (saturated) kN/m² Growing media bulk density (saturated) kN/m³ Typical saturated media: 1.2–1.8 kN/m³ (75–115 lb/ft³). Vegetation + accessories kN/m² Insulation (optional) kN/m² Pavers, ballast, furniture (optional) kN/m² Live loads & capacity check (optional) Additional live load (snow, maintenance) kN/m² Use local code minimum roof live load or snow load if known. Roof allowable capacity kN/m² From structural drawings or engineer (service‑level allowable). Global safety factor Applied to total load for a simple utilization check. Calculate green roof load Reset to defaults Results Surface loads Media load (saturated) – Other layers dead load – Total dead load (saturated) – Live load (input) – Total design load – Total weight & capacity check Total dead load weight – Total design load weight – Capacity (with safety factor) – Utilization ratio – How the green roof load calculator works This calculator estimates the permanent (dead) load and total design load of a green roof by summing the saturated weight of each layer and any additional live loads you specify. It supports both metric (kN/m², kg/m²) and imperial (psf, lb/ft²) units and provides a quick utilization check against your roof’s allowable capacity. 1. Layer‑by‑layer load model The total surface load is split into: Membrane + protection board (waterproofing, root barrier, protection mat) Drainage + filter layer (drainage board, water retention mat, filter fabric) Growing media (substrate depth × saturated bulk density) Vegetation + accessories (plants, trays, edging, irrigation) Optional layers such as insulation, pavers, ballast, or furniture Media load (saturated) In metric: \[ q_\text{media} = \gamma_\text{media,sat} \times h_\text{media} \] where: \(\gamma_\text{media,sat}\) = saturated bulk density (kN/m³) \(h_\text{media}\) = media depth (m) Total dead load: \[ q_\text{dead} = q_\text{media} + q_\text{membrane} + q_\text{drainage} + q_\text{vegetation} + q_\text{insulation} + q_\text{additional} \] Total design load: \[ q_\text{total} = q_\text{dead} + q_\text{live} \] 2. Typical green roof weight ranges Based on common manufacturer data and design guides, saturated weights often fall in these ranges: Extensive roofs (60–150 mm media): ~0.8–1.5 kN/m² (17–31 psf) Semi‑intensive roofs (150–300 mm): ~1.5–3.0 kN/m² (31–63 psf) Intensive roofs (>300 mm, shrubs/trees): >3.0 kN/m² (>63 psf), sometimes much higher The calculator uses these ranges to update the hint under “Green roof type” and to pre‑fill a reasonable saturated media density. You should always replace these with project‑specific values from the system supplier when available. 3. Converting surface load to total weight Once the total surface load \(q\) is known, the total weight on the structure is simply: Total weight Metric: \[ W = q \times A \] where \(W\) is in kN and \(A\) is area in m². Imperial: \[ W = q \times A \] where \(W\) is in pounds (lb) and \(A\) is area in ft². 4. Capacity and utilization check If you know the roof’s allowable capacity \(q_\text{cap}\) (e.g., from structural drawings), the calculator applies a simple global safety factor \(\gamma\) and computes a utilization ratio: Utilization ratio \[ q_\text{cap,eff} = \frac{q_\text{cap}}{\gamma} \] \[ U = \frac{q_\text{total}}{q_\text{cap,eff}} \] If \(U \le 1.0\), the estimated load is within the simplified target limit. If \(U > 1.0\), the estimated load exceeds the target and you should reduce weight or increase capacity. Real building codes (e.g., ASCE 7) use more detailed load combinations and partial safety factors; this simple check is only for early‑stage screening. Design tips for green roof loading Use saturated, not dry, weights Growing media and drainage layers can retain a large amount of water. For structural design, use saturated unit weights supplied by the manufacturer or from testing. Dry weights are useful for logistics but are not conservative for load calculations. Account for snow, maintenance, and people Apply at least the code‑required roof live load for your jurisdiction. In snow climates, consider snow load combinations with green roof dead load. For accessible roofs, include loads from people, furniture, and equipment . Coordinate early with a structural engineer Before committing to a green roof system, share preliminary load estimates with a structural engineer. They can: Verify whether the existing structure can support the added weight Recommend strengthening measures if needed Check all relevant load combinations and deflection limits Typical data sources for unit weights Green roof system manufacturer datasheets National or regional green roof guidelines Project specifications and test reports FAQ How much does a green roof typically weigh? Extensive systems often range from about 60–170 kg/m² (12–35 psf) saturated. Semi‑intensive roofs may be 150–300 kg/m² (30–60 psf), and intensive roofs with deep soil and trees can exceed 500 kg/m² (100 psf). Always confirm with manufacturer data and a structural engineer. What’s the difference between dead load and live load on a green roof? Dead load is the permanent weight of the green roof assembly, including saturated water content. Live load is temporary loading such as people, maintenance equipment, snow, and stored materials. Codes specify minimum roof live loads that must be combined with dead loads in design. Can I retrofit a green roof on an existing building? Often yes, but only after a structural assessment. Many existing roofs were not designed for the additional saturated weight of a green roof. Lightweight extensive systems are more commonly used for retrofits. Does this calculator replace a structural design? No. This tool is intended for preliminary sizing, comparison of options, and education. Final design, detailing, and code compliance must be performed and stamped by a qualified structural engineer. Related Construction & DIY Calculators Construction Cost Estimator Roof Pitch Calculator Concrete Slab Volume Decking Calculator Insulation Calculator Roofing Calculator Mulch Calculator Topsoil Calculator Quick reference: typical saturated loads Roof type kN/m² psf Extensive 0.8–1.5 17–31 Semi‑intensive 1.5–3.0 31–63 Intensive >3.0 >63 Always replace these with system‑specific values from the manufacturer and verify with a structural engineer.

Interiors, Envelope & Finishes

Lumens to Watts Lumens to Watts Converter LED, CFL, halogen or old-school incandescent: pick the light source, enter the lumens you need, and we estimate how many watts the lamp will draw. You can also go backwards (watts → lumens). 1. Lumens → Watts Lumens ≈ common 60W incandescent light Light source LED (high eff.) – 120 lm/W LED (std) – 100 lm/W CFL – 70 lm/W Halogen – 18 lm/W Incandescent – 12 lm/W Custom lm/W… Watts (estimated) watts = lumens ÷ lm/W 2. Watts → Lumens Watts you have e.g. LED 10W bulb Using same light source We reuse the lm/W chosen above. Lumens (estimated) lumens = watts × lm/W Current efficacy: 100 lm/W Real fixtures have drivers, optics and dirt over time, so treat this as a practical estimate. Common lighting equivalents Old incandescent Approx. lumens LED (100 lm/W) Notes 40 W 450 lm 4.5 W Small room, hallway 60 W 800 lm 8 W Most common bulb 75 W 1100 lm 11 W Brighter task light 100 W 1600 lm 16 W Large room Why lumens and watts aren’t the same thing Watt (W) is electrical power. Lumen (lm) is visible light output. Two lamps with the same wattage can produce very different lumen levels depending on their efficiency (lm/W). Formulas watts = lumens ÷ (lumens per watt) lumens = watts × (lumens per watt) Example: 1,200 lm with LED 100 lm/W: watts = 1200 ÷ 100 = 12 W Typical efficacies (rule of thumb) Incandescent: 10–15 lm/W Halogen: 15–20 lm/W CFL: 60–75 lm/W LED household: 80–110 lm/W Good LED panel/strip: 110–130 lm/W FAQ 1. How many watts is 800 lumens? At 100 lm/W (typical LED), 800 ÷ 100 = 8 W. 2. How many lumens is a 10W LED? 10 × 100 = 1,000 lm if it’s a decent LED. Use your real fixture’s lm/W for a better number. 3. Can I use this for outdoor lighting? Yes — pick the LED value closest to your product datasheet, or enter custom lm/W. Related tools Power Unit Converter Pressure Conversions Length Converter Volume & Capacity Mass & Weight Lighting tips Compare bulbs by lumens, not watts. Use manufacturer lm/W if available. Round up for task or outdoor lighting.

Materials

Materials Estimation

Materials Estimation Materials Estimation Calculator Estimate quantities and cost for multiple construction materials (concrete, gravel, mulch, paint, drywall, lumber and more) in a single, flexible worksheet. Quick Estimator Detailed Takeoff Summary & Cost 1. Quick Materials Estimator Use these presets for the most common materials. You can switch units and adjust coverage or yield if your product data sheet is different. Concrete Slab Default yield: 1 yd³ = 27 ft³ Length ft m Width ft m Thickness in cm Waste

Molding Calculator Molding Calculator Estimate trim, crown, picture frame molding, and wainscoting for your room. Get total linear feet, material sticks, and a cut-friendly layout in one place. Room Perimeter (Baseboard

Mortar Mix Calculator Mortar Mix Calculator Estimate mortar mix ratios, volume, bag counts, sand and cement quantities for brick, block and stone projects. Supports Type N, S, M, O and custom mixes with adjustable waste and bag sizes. Mortar mix & quantity calculator 1. Mix type & ratio Mortar type Type N (general above-grade) Type S (structural

Mulch Calculator Mulch Calculator Estimate how much mulch you need in cubic yards, cubic feet, liters, and bags for any garden bed shape, plus compare bulk vs bag cost. Area shape Rectangle

Project and Renovation Cost Estimates Project and Renovation Cost Estimates Calculator Build a room‑by‑room renovation budget with low, typical, and high cost ranges. Adjust quality level, scope of work, contingency, and contractor overhead to match your project. Currency USD ($) EUR (€) GBP (£) AUD (A$) CAD (C$) Measurement unit Square feet (ft²) Square meters (m²) Overall quality level Basic

Project Layout & Design

Roof Pitch Calculator Roof Pitch Calculator Convert roof pitch between rise/run, 12‑based pitch, degrees, and percent slope. Estimate rafter length and roof height from span or run. Interactive Roof Pitch Calculator Rise & Run Pitch (x:12) Angle (°) % Slope Length units Feet Meters Building span (optional) ft Full width of building. Used to compute rise and rafter length. Eave overhang (optional) ft Horizontal overhang beyond wall. Added to rafter length. Rise ft Run ft Horizontal distance from wall plate to ridge. Rise (x) per 12 Enter the rise for every 12 units of run (x:12). Run is fixed at 12 units in this mode. Roof angle ° Angle between roof surface and horizontal. Slope (%) % Percent slope = rise ÷ run × 100. Calculate Reset Results Pitch & Slope Pitch (x:12): – Angle: – Percent slope: – Rise : Run: – Rafter & Height Run used: – Rise used: – Rafter length: – Total rafter incl. overhang: – What is roof pitch? Roof pitch describes how steep a roof is. In North America it is usually written as rise in inches per 12 inches of run , for example 6:12 . The higher the first number, the steeper the roof. Roof pitch can be expressed in several equivalent ways: Pitch (x:12) – e.g. 4:12, 6:12, 12:12 Angle in degrees – angle between roof surface and horizontal Percent slope – rise ÷ run × 100 Rise

Roofing Calculator Roofing Calculator Estimate roof area, roofing squares, shingle bundles, underlayment, ridge caps, and material cost for gable, hip, shed, and flat roofs. Units Feet

Roofing Roofing Calculator – Area, Shingles, Underlayment & Cost Estimate roof area, shingles, underlayment, ridge caps, nails, waste factor, and total cost for gable, hip, shed, and complex roofs. Ideal for homeowners, contractors, and estimators. Roofing Material & Cost Calculator Unit system Imperial (ft, sq ft) Metric (m, m²) Waste factor (%) Typical: 5–10% simple gable, 10–15% hip/complex roofs. Roof sections + Add section Material coverage & pricing (optional) Shingle coverage per bundle sq ft/bundle Typical 3-tab bundle ≈ 33.3 sq ft of coverage. Price per shingle bundle $ Underlayment coverage per roll sq ft/roll Price per underlayment roll $ Ridge cap coverage per bundle linear ft/bundle Price per ridge cap bundle $ Nails per 100 sq ft Approx. 4 nails per shingle, 80 shingles per square. Labor cost per unit area (optional) $ Per roofing square (100 sq ft). Calculate roofing materials Results Roof area Total sloped area (no waste): With waste factor: Materials Cost estimate This is a planning estimate only. Get written quotes from licensed roofing contractors before starting work. How this roofing calculator works This roofing calculator is designed to be more practical than simple “length × width” tools. It lets you: Add multiple roof sections (for L-shaped or complex roofs). Account for roof pitch, overhangs, and ridge length. Estimate shingles, underlayment, ridge caps, nails, and cost. Switch between imperial (ft, sq ft) and metric (m, m²) units. 1. Roof section geometry Each section is treated as a simple rectangle in plan view. You enter: Length (horizontal run along the eave). Width (horizontal run from eave to eave, not along the slope). Overhang (optional extension beyond walls, applied to all sides). Pitch (e.g., 4:12, 6:12, 8:12). Ridge length for that section (if applicable). The flat footprint area is: Footprint area = (length + 2 × overhang) × (width + 2 × overhang) Roof pitch is converted to a pitch factor : Pitch factor = √(1 + (rise

Sand Calculator Sand Calculator – Volume, Weight, Coverage & Cost Estimate how much sand you need for landscaping, pavers, concrete, playgrounds, and more. Get volume, weight, truck loads, and cost in one place. Sand quantity calculator Area shape Rectangle

Sand Calculator Sand Calculator Estimate sand volume, weight, and number of bags for pavers, playgrounds, sandboxes, and general fill. Supports multiple shapes, units, densities, and waste allowance. Sand quantity estimator Paver bedding Sandbox (shallow) Sandbox (deep) General fill Area shape Rectangle

Scale Conversion Calculator Scale Conversion Calculator Convert real-world dimensions to scale model size and back. Supports any ratio (1:24, 1:35, 1:48, 1:72, 1:87, 1:100, etc.) with mixed units and direct scale-to-scale conversion. 1. Choose mode & scale Conversion mode Real → Model Model → Real Enter a real-world dimension and get the scaled model size. Common scales Select a preset (optional) HO – 1:87 N – 1:160 Z – 1:220 O – 1:48 1:24 – Large car models 1:25 – Car models 1:32 – Aircraft, figures 1:35 – Military 1:48 – Aircraft 1:72 – Aircraft, armor 1:144 – Small aircraft 1:50 – Architecture 1:100 – Architecture 1:200 – Site plans 1:500 – Master plans 1:1000 – Maps Custom scale ratio 1 : Example: for 1:35 scale, enter 35 . Convert between two scales (optional) Already have a model in one scale and want to convert it to another? Enable this and choose both scales. Enable scale → scale conversion Original scale (1 : n) Target scale (1 : n) 2. Enter measurement Measurement (real size) mm cm m in ft Output unit mm cm m inches feet Convert Result – Tip: You can type values like 12.7 or 1/4 (fractions) in the measurement box. Popular scales quick reference 1:24 – 1 cm model = 24 cm real 1:35 – 1 mm model ≈ 35 mm real 1:48 – 1 inch model = 4 ft real 1:72 – 1 cm model = 72 cm real 1:87 (HO) – 1 mm model ≈ 87 mm real 1:160 (N) – 1 cm model = 1.6 m real How the scale conversion calculator works A drawing or model scale is usually written as 1:n . That means 1 unit on the model equals n units in real life , regardless of which unit you use. Real → Model Given real size \( L_\text{real} \) and scale 1 : n: \[ L_\text{model} = \frac{L_\text{real}}{n} \] Model → Real \[ L_\text{real} = L_\text{model} \times n \] Example: 4.8 m car at 1:24 scale Convert 4.8 m to mm: \( 4.8 \text{ m} = 4800 \text{ mm} \). Apply scale 1:24: \[ L_\text{model} = \frac{4800}{24} = 200 \text{ mm} \] The model car should be 200 mm (20 cm) long. Converting between two scales Sometimes you have a dimension already drawn or built in one scale and you want it in another (for example, converting a 1:72 plan to 1:48). The steps are: Convert from original scale back to real size. Convert from real size to the new scale. Original scale 1 : \( n_1 \), target scale 1 : \( n_2 \), model length \( L_1 \): \[ L_\text{real} = L_1 \times n_1 \] \[ L_2 = \frac{L_\text{real}}{n_2} = L_1 \times \frac{n_1}{n_2} \] So you can multiply the original model length by \( \dfrac{n_1}{n_2} \) directly. Worked example: 1:72 to 1:48 A wing is 100 mm long on a 1:72 drawing. What should it be at 1:48? \( n_1 = 72 \), \( n_2 = 48 \), \( L_1 = 100 \text{ mm} \) \( L_2 = 100 \times \dfrac{72}{48} = 100 \times 1.5 = 150 \text{ mm} \) The wing should be 150 mm on the 1:48 drawing. Common modeling, architecture, and map scales Model railroading HO (1:87) – most popular model railway scale. N (1:160) – smaller, good for limited space. Z (1:220) – very small, portable layouts. Plastic models & miniatures 1:24

Stairs Calculator Stairs Calculator Design safe, comfortable straight stairs in seconds – rise, run, stringer length, headroom and code checks in one tool. Units: Imperial (ft

Stone Calculator Stone Calculator – Estimate Tons, Yards & Coverage Estimate how much crushed stone, gravel, river rock, or landscape rock you need. Enter your area, depth, and stone type to get volume and weight in multiple units. 1. Area shape Rectangle Circle Border

Wall Framing Calculator Wall Framing Calculator Lay out studs, plates, openings, and blocking for straight, code-friendly walls. Get a fast material takeoff and layout guide. Wall layout & material takeoff Wall length feet inches Wall height (plate to plate) feet inches Finished wall height from bottom of bottom plate to top of top plate. Stud spacing (on center) 16" o.c. (standard) 24" o.c. Top plates Double top plate Single top plate Lumber size 2×4 2×6 Corner studs 2-stud corner 3-stud corner 4-stud corner Wall intersections (T-walls) Number of interior walls tying into this wall. Horizontal blocking

Wallpaper Calculator Wallpaper Calculator Estimate wallpaper rolls, cost, and waste for any room. Supports multiple walls, doors & windows, pattern repeat, and US/metric units. Wallpaper calculator Units Feet