Unit Conversions

Convert units and look up common values in one place. Choose the tabs you use, and they will be here next time.

  • 18 converters and references
  • Exact conversion factors
  • Remembers your tabs

Every converter on its own page

Each page has the converter, a quick reference table, worked examples and the exact factors used.

Pressure converterPa, kPa, MPa, bar, mbar and moreDensity converterkg/m³, g/cm³, kg/L, g/L, lb/ft³ and moreTemperature converter°C, K, °F, °R and moreAngles converter°, rad, mrad, grad, turn and moreFlow Rate converterm³/s, m³/min, m³/h, L/s, L/min and moreTime converterns, µs, ms, s, min and moreStress converterPa, kPa, MPa, GPa, psi and moreStrain converterm/m, mm/m, %, µε and moreVelocity converterm/s, mm/s, km/h, mph, ft/s and moreVolume converterm³, L, mL, cm³, in³ and moreLength converterµm, mm, cm, m, km and moreMass convertermg, g, kg, t, oz and moreForce converterdyn, N, kN, MN, lbf and moreTorque converterN·mm, N·m, kN·m, lbf·ft, lbf·in and morePower converterW, kW, MW, hp, PS and moreEnergy convertereV, J, kJ, MJ, Wh and moreText encoding converterText, hex, binary, decimal and Base64Material properties tableDensity, stiffness, strength and thermal data

About these converters

Every converter here uses exact conversion factors, and shows its working so you can check it. Most units are a simple multiplication, but temperature needs an offset as well as a factor, which is why the Temperature converter works differently from the rest.

Each quantity also has its own page with a table of the same value in every unit, worked examples with the exact factors, a quick-reference matrix and the common values people look up most. Pick the tabs you use on this page and they will be here next time.

Found a unit we are missing or a value that looks wrong? Tell us. See how we write and check our pages.