Engineering calculators

Motor torque

Find shaft torque from power and rotational speed.

Gear ratio

Find the gear ratio and output speed from tooth counts.

Pulley speed

Calculate driven RPM and ratio from pulley diameters.

Belt length

Estimate open-belt length from two pulleys and their spacing.

Linear speed / RPM

Convert roller diameter and RPM to surface speed, or reverse it.

Cylinder force

Find extension and retraction force from dimensions and pressure.

Cylinder speed / flow

Find cylinder speeds, travel times or the required flow.

Hydraulic power

Find hydraulic and required input power from pressure and flow.

Pump flow

Find pump flow, displacement or RPM with volumetric efficiency.

Pressure / force / area

Enter two values to find pressure, force or effective area.

Plate weight

Find weight per plate and total weight from material and dimensions.

Round bar weight

Find round bar weight from diameter, length and material.

Pipe weight

Find pipe weight from outer diameter and wall thickness.

Rectangular tube weight

Find square or rectangular tube weight from dimensions.

Electrical

Single / three-phase power

Find AC power or current from voltage, power factor and phase.

CNC cutting speed / RPM

Convert cutting speed and diameter into spindle RPM, or reverse it.

CNC feed rate / chip load

Calculate table feed, feed per tooth or RPM for milling.

Tap drill size

Estimate a tap hole diameter from thread size and pitch.