Mechanical Engineering Calculators
Machine design, stress, fluids, HVAC, manufacturing, and vibration tools built for fast engineering decisions with reliable methods.
Machine Design & Kinematics
Gear ratio calculator
Compute ratio, speed, and torque relationships for gear pairs and trains.
Torque calculator
Relate torque, force, and radius with quick unit-aware results.
Horsepower calculator
Convert between power, torque, and RPM instantly.
Pulley speed calculator
Find driven speed and ratio for belt and pulley systems.
Spring rate calculator
Estimate stiffness, deflection, and preload for common spring types.
Belt drive design calculator
Select belt length, wrap angle, and center distance with ease.
Chain drive design calculator
Size sprockets, pitch, and chain length for reliable transmission.
Cam profile design calculator
Generate motion laws and key cam parameters for follower travel.
Bolt torque calculator
Determine tightening torque from preload, size, and friction assumptions.
Journal bearing design calculator
Evaluate load capacity, clearance, and Sommerfeld number.
Shaft design calculator
Check stresses and deflection for stepped or keyed shafts.
Ball bearing life calculator
Estimate L10 bearing life from load and speed conditions.
Pressure vessel design (ASME)
Quick wall thickness and hoop stress checks for cylinders and heads.
Fin heat transfer calculator
Compute fin efficiency and heat dissipation for common fin types.
Mechanics of Materials
Stress and strain calculator
Convert between stress, strain, and modulus for axial and shear loads.
Factor of safety calculator
Check static safety using yield or ultimate criteria and applied loads.
Beam deflection calculator
Predict deflection and slope for standard loads and supports.
Thermal stress calculator
Estimate stresses from constrained thermal expansion.
Fatigue life (S–N) calculator
Approximate cycles to failure from stress amplitude and material data.
Fracture mechanics (K) calculator
Evaluate stress intensity factor and crack growth parameters.
Hardness conversion calculator
Convert between Rockwell, Brinell, and Vickers hardness scales.
Welded connection design
Check fillet and groove weld capacities under combined loading.
Fluids & Thermodynamics
Reynolds number calculator
Classify flow regime and assess similarity scaling.
Bernoulli's equation calculator
Relate pressure, velocity, and elevation for steady incompressible flow.
Heat transfer calculator
Conduction, convection, and radiation estimates in one place.
Rankine cycle calculator
Approximate thermal efficiency and state points for steam cycles.
Heat exchanger (LMTD) calculator
Size exchangers using LMTD or UA methods for common configurations.
Pipe flow (hazen–williams)
Estimate head loss in water systems using empirical C factors.
Pipe flow (darcy–weisbach)
Compute friction losses via Moody or Colebrook correlations.
Orifice plate flow calculator
Measure flow rate from differential pressure across an orifice.
Pump power calculator
Find hydraulic and shaft power from flow, head, and efficiency.
Hydrostatic pressure calculator
Determine pressure with depth for liquids at rest.
Pump sizing calculator
Select pump capacity from system curve and duty point.
Pipe sizing (water) calculator
Choose pipe diameter to meet velocity and head loss targets.
HVAC & Thermal Systems
HVAC tonnage calculator
Estimate cooling capacity requirements for spaces.
Duct sizing (equal friction)
Size ducts by target friction rate and airflow.
Psychrometric calculator
Get humidity ratio, enthalpy, and state points from temperature and RH.
Heat loss calculator
Estimate envelope and infiltration heat losses.
Chiller load calculator
Compute cooling load from flow rate and temperature drop.