Professional Calculators
Practical calculators for professionals and everyday technical work.
34 calculators
Engineering Calculators
View allMotor 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.
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.
Machining time
Estimate cutting time from distance, feed, passes and quantity.
Business & Sales Calculators
View allConstruction & Materials Calculators
View allConcrete
Estimate concrete volume for rectangular slabs, floors and footings.
Paint quantity
Estimate paint from area, coats and the coverage on your paint label.
Tile quantity
Estimate tiles and optional boxes from surface and tile dimensions.
Manufacturing & Cost Calculators
View allMachining cost
Estimate batch and per-part costs from machining, setup and materials.
Machine hour cost
Build an hourly machine cost from depreciation, upkeep and electricity.
OEE
Calculate availability, performance, quality and overall equipment effectiveness.