How do I estimate soil volume for a raised bed?

Multiply inside length × width × depth to get volume. Convert to cubic yards or liters for ordering and to bag counts using your bag size.

Square vs hex spacing—what’s the difference?

Hexagonal packing is more efficient (~9% higher density) than square. Use it for intensive plantings where airflow allows.

How many soil bags do I need?

Divide total volume by bag volume. Set your bag size (e.g., 50 L or 2 cu ft) to see the count.

What mulch depth should I use?

Most beds use 2–3 inches (5–7.5 cm). Adjust for climate, weed pressure, and material type.

Do these results include soil settling?

No. Add 10–20% extra for settling, especially for fresh mixes with high organic content.

Can I mix a custom raised-bed blend?

Yes. Use the Blend tab to allocate percentages for compost, topsoil, and aeration (or your own components) and see volumes per component.

Does the calculator support metric and imperial?

Yes, switch units per field (ft/m for dimensions; results display cubic feet, yards, meters, liters and bag counts.

How do I estimate soil volume for a raised bed?

Multiply inside length × width × depth to get volume. Convert to cubic yards or liters for ordering and to bag counts using your bag size.

Square vs hex spacing—what’s the difference?

Hexagonal packing is more efficient (~9% higher density) than square. Use it for intensive plantings where airflow allows.

How many soil bags do I need?

Divide total volume by bag volume. Set your bag size (e.g., 50 L or 2 cu ft) to see the count.

What mulch depth should I use?

Most beds use 2–3 inches (5–7.5 cm). Adjust for climate, weed pressure, and material type.

Do these results include soil settling?

No. Add 10–20% extra for settling, especially for fresh mixes with high organic content.

Can I mix a custom raised-bed blend?

Yes. Use the Blend tab to allocate percentages for compost, topsoil, and aeration (or your own components) and see volumes per component.

Does the calculator support metric and imperial?

Yes, switch units per field (ft/m for dimensions; results display cubic feet, yards, meters, liters and bag counts.

How do I estimate soil volume for a raised bed?

Multiply inside length × width × depth to get volume. Convert to cubic yards or liters for ordering and to bag counts using your bag size.

Square vs hex spacing—what’s the difference?

Hexagonal packing is more efficient (~9% higher density) than square. Use it for intensive plantings where airflow allows.

How many soil bags do I need?

Divide total volume by bag volume. Set your bag size (e.g., 50 L or 2 cu ft) to see the count.

What mulch depth should I use?

Most beds use 2–3 inches (5–7.5 cm). Adjust for climate, weed pressure, and material type.

Do these results include soil settling?

No. Add 10–20% extra for settling, especially for fresh mixes with high organic content.

Can I mix a custom raised-bed blend?

Yes. Use the Blend tab to allocate percentages for compost, topsoil, and aeration (or your own components) and see volumes per component.

Does the calculator support metric and imperial?

Yes, switch units per field (ft/m for dimensions; results display cubic feet, yards, meters, liters and bag counts.

Gardening Calculator – Soil Volume, Plant Count, Mulch & Bags

All-in-one gardening calculator: soil volume for beds and planters, plant counts by spacing (square or hex packing), mulch depth, and bag estimates. Perfect for raised beds and square-foot gardening.

Full original guide (expanded)

CalcDomain

Audit: Complete

Formula (LaTeX) + variables + units

This section shows the formulas used by the calculator engine, plus variable definitions and units.

Formula (extracted text)

Volume (rectangular bed): \( V = L \times W \times D \). Unit conversions: \( 1\,\text{ft}^3=28.3168466\,\text{L} \), \( 1\,\text{yd}^3=27\,\text{ft}^3 \), \( 1\,\text{m}^3=1000\,\text{L} \). Bag count: \( \text{Bags}=\left\lceil \dfrac{V}{V_{\text{bag}}} \right\rceil \). Plant count (square grid) (with area \(A=L\times W\), spacing \(s\)): \( N_{\square} \approx \left\lfloor \dfrac{A}{s^2} \right\rfloor \). Plant count (hex packing): \( N_{\hexagon} \approx \left\lfloor \dfrac{\eta_{\mathrm{hex}}\,A}{s^2} \right\rfloor \), where \( \eta_{\mathrm{hex}}\approx0.9069 \). Blend components for total volume \(V\) and percentages \(p_i\): \( V_i = p_i \times V \).

Variables and units

No variables provided in audit spec.

Sources (authoritative):

NIST SI Units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/si-units
Home — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/
Lifestyle Everyday — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/lifestyle-everyday
Hobbies — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/subcategories/hobbies
Soil & Mulch Depth Planner — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/soil-calculator

Changelog

Version: 0.1.0-draft
Last code update: 2026-01-19

0.1.0-draft · 2026-01-19

Initial audit spec draft generated from HTML extraction (review required).
Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
Confirm sources are authoritative and relevant to the calculator methodology.

Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

, '

CalcDomain

Audit: Complete

Formula (LaTeX) + variables + units

This section shows the formulas used by the calculator engine, plus variable definitions and units.

Formula (extracted text)

Volume (rectangular bed): \( V = L \times W \times D \). Unit conversions: \( 1\,\text{ft}^3=28.3168466\,\text{L} \), \( 1\,\text{yd}^3=27\,\text{ft}^3 \), \( 1\,\text{m}^3=1000\,\text{L} \). Bag count: \( \text{Bags}=\left\lceil \dfrac{V}{V_{\text{bag}}} \right\rceil \). Plant count (square grid) (with area \(A=L\times W\), spacing \(s\)): \( N_{\square} \approx \left\lfloor \dfrac{A}{s^2} \right\rfloor \). Plant count (hex packing): \( N_{\hexagon} \approx \left\lfloor \dfrac{\eta_{\mathrm{hex}}\,A}{s^2} \right\rfloor \), where \( \eta_{\mathrm{hex}}\approx0.9069 \). Blend components for total volume \(V\) and percentages \(p_i\): \( V_i = p_i \times V \).

Variables and units

No variables provided in audit spec.

Sources (authoritative):

NIST SI Units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/si-units
Home — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/
Lifestyle Everyday — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/lifestyle-everyday
Hobbies — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/subcategories/hobbies
Soil & Mulch Depth Planner — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/soil-calculator

Changelog

Version: 0.1.0-draft
Last code update: 2026-01-19

0.1.0-draft · 2026-01-19

Initial audit spec draft generated from HTML extraction (review required).
Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
Confirm sources are authoritative and relevant to the calculator methodology.

Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

]], displayMath: [['\\[','\\]']] }, svg: { fontCache: 'global' } };

CalcDomain

Audit: Complete

Formula (LaTeX) + variables + units

This section shows the formulas used by the calculator engine, plus variable definitions and units.

Formula (extracted text)

Volume (rectangular bed): \( V = L \times W \times D \). Unit conversions: \( 1\,\text{ft}^3=28.3168466\,\text{L} \), \( 1\,\text{yd}^3=27\,\text{ft}^3 \), \( 1\,\text{m}^3=1000\,\text{L} \). Bag count: \( \text{Bags}=\left\lceil \dfrac{V}{V_{\text{bag}}} \right\rceil \). Plant count (square grid) (with area \(A=L\times W\), spacing \(s\)): \( N_{\square} \approx \left\lfloor \dfrac{A}{s^2} \right\rfloor \). Plant count (hex packing): \( N_{\hexagon} \approx \left\lfloor \dfrac{\eta_{\mathrm{hex}}\,A}{s^2} \right\rfloor \), where \( \eta_{\mathrm{hex}}\approx0.9069 \). Blend components for total volume \(V\) and percentages \(p_i\): \( V_i = p_i \times V \).

Variables and units

No variables provided in audit spec.

Sources (authoritative):

NIST SI Units — nist.gov · Accessed 2026-01-19
https://www.nist.gov/pml/owm/si-units
Home — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/
Lifestyle Everyday — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/lifestyle-everyday
Hobbies — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/subcategories/hobbies
Soil & Mulch Depth Planner — calcdomain.com · Accessed 2026-01-19
https://calcdomain.com/soil-calculator

Changelog

Version: 0.1.0-draft
Last code update: 2026-01-19

0.1.0-draft · 2026-01-19

Initial audit spec draft generated from HTML extraction (review required).
Verify formulas match the calculator engine and convert any text-only formulas to LaTeX.
Confirm sources are authoritative and relevant to the calculator methodology.

Verified by Ugo Candido on 2026-01-19
Profile · LinkedIn

Formulas

(Formulas preserved from original page content, if present.)

Version 0.1.0-draft

Citations

Add authoritative sources relevant to this calculator (standards bodies, manuals, official docs).

Changelog

0.1.0-draft — 2026-01-19: Initial draft (review required).