Unit Conversions for Engineers
Engineering work constantly crosses the boundary between metric and imperial units. Whether you are reviewing specifications from an international supplier, converting material properties between standards, or translating between SI and US customary units for a drawing, having reliable conversion tools saves time and prevents costly errors.
Most Used Conversions
PSI, bar, kPa, atm
Force ConverterNewtons, lbf, kgf
Torque ConverterN·m, ft·lbf, in·lbf
Power ConverterWatts, HP, BTU/hr
Energy ConverterJoules, BTU, kWh, calories
Length Convertermm, inches, meters, feet
Temperature Converter°C, °F, K
Density Converterkg/m³, lb/ft³, g/cm³
Acceleration Converterm/s², ft/s², g
Digital Storage ConverterKB, MB, GB, TB
Dynamic ViscosityPa·s, cP, lb/(ft·s)
Frequency ConverterHz, kHz, MHz, GHz
Quick Reference: Pressure
| PSI | Bar | kPa | atm |
|---|---|---|---|
| 14.7 | 1.013 | 101.3 | 1.000 |
| 50 | 3.447 | 344.7 | 3.401 |
| 100 | 6.895 | 689.5 | 6.805 |
| 500 | 34.47 | 3,447 | 34.02 |
| 1,000 | 68.95 | 6,895 | 68.05 |
Quick Reference: Torque
| N·m | ft·lbf | in·lbf |
|---|---|---|
| 1 | 0.738 | 8.851 |
| 10 | 7.376 | 88.51 |
| 50 | 36.88 | 442.5 |
| 100 | 73.76 | 885.1 |
| 500 | 368.8 | 4,425 |
Recommended Tools
Related Guides
In-Depth Engineering Guides
N·m to ft·lbf and in·lbf, automotive torque specs, formula reference
Pressure Unit ConversionsPSI, kPa, bar, MPa — gauge vs absolute, engineering application ranges
Electrical Unit GuideOhm's Law, P = VI, kWh, three-phase power, voltage standards by country
Dimensional Analysis GuideUnit cancellation method with worked examples for speed, pressure, energy