Engineering Unit Converter
Convert common engineering and scientific measurements accurately across SI, imperial, and other unit systems.
Engineering unit conversion
Convert between SI, imperial, US customary, and engineering units across twelve categories, with the precision control and conversion history that repeat calculation work needs.
- Length, mass, area, volume, and time.
- Pressure (Pa, kPa, bar, psi, atm), energy (J, kWh, BTU, kcal), and power.
- Temperature in Celsius, Fahrenheit, and Kelvin.
- Electrical units: current, voltage, and resistance.
Frequently asked questions
- How many pascals are in 1 psi?
- One pound per square inch equals 6894.757 pascals, or about 6.895 kPa. Going the other way, 1 bar is exactly 100 000 Pa and about 14.504 psi, and one standard atmosphere is 101 325 Pa or about 14.696 psi.
- How do you convert between Celsius, Fahrenheit, and Kelvin?
- Kelvin and Celsius share a degree size, so K = °C + 273.15. Fahrenheit uses a different size and origin: °F = °C × 9/5 + 32, and °C = (°F − 32) × 5/9. Temperature conversions are offset conversions, not simple ratios, which is why they cannot be done by multiplying alone.