Engineering Unit Converter
Convert the units engineers actually use — pressure, force, torque, energy, power, flow rate and temperature — with an instant from/to result and a full table in every unit at once.
| Unit | Value |
|---|
One Converter for the Units Engineers Actually Use
General converters are full of cooking cups and shoe sizes. This one sticks to the quantities that show up in engineering work — pressure, force, torque, energy, power, flow rate and temperature — and shows your value in every unit of that quantity at once, so you can sanity-check a spec sheet at a glance.
Handy Conversions to Remember
| Quantity | Conversion |
|---|---|
| Pressure | 1 psi = 6.895 kPa; 1 bar = 14.50 psi; 1 atm = 101.325 kPa |
| Force | 1 lbf = 4.448 N; 1 kgf = 9.807 N |
| Torque | 1 lbf·ft = 1.356 N·m |
| Energy | 1 BTU = 1055 J; 1 kWh = 3.6 MJ |
| Power | 1 hp = 745.7 W; 1 kW = 1.341 hp |
| Flow | 1 GPM = 3.785 L/min |
Torque and Energy Are Not the Same
A newton-metre of torque and a joule of energy have the same base dimensions, but they are different physical quantities — torque is a twisting moment, energy is work done. The converter keeps them in separate categories on purpose, so you never accidentally turn a bolt spec into a battery rating.
Frequently Asked Questions
Which horsepower is this?
The hp option is mechanical (imperial) horsepower, 745.7 W. A separate hp(metric) option gives the 735.5 W metric variant used in some European specs.
Is GPM US or imperial gallons?
US gallons per minute (1 GPM = 3.785 L/min). Imperial gallons are about 20 percent larger, so watch the source of any pump curve.
How is temperature handled?
Temperature uses offset formulas, not a single factor, so Celsius, Fahrenheit, Kelvin and Rankine all convert correctly rather than scaling from zero.
Related calculators
- Mechanical Force Calculator — force from mass, pressure, torque and more.
- Torque Calculator — work in N·m or lbf·ft.
- Three-Phase Power Calculator — power in kW, kVA and hp.
- Heat Transfer Calculator — energy and power in W and BTU/hr.
- All engineering calculators — the full library.