Units & conversions
Units & conversions
Conversions between quantities, units and conventions.
- Convert bar to psiConvert a pressure from bar to psi (pound-force per square inch) and back, with the exact factor and a tire/hydraulics example.
- Convert degrees to radiansConvert degrees to radians and back, with the exact π/180 factor, the notable values and the calculator-mode trap.
- Decibel converterdB, dBm, dBµV, dB SPL: ratios, powers, voltages and pressures converted both ways, plus adding two levels, without the 10 vs 20 trap.
- Density converterConvert kg/m³, g/cm³, g/mL and lb/ft³, and note that 1 kg/m³ is exactly 1 g/L.
- Electrical unit converterConvert volts, amperes, ohms, farads, henrys, coulombs, mAh and teslas, the full SI prefix range of electronics.
- Energy converterConvert joules, calories, watt-hours, electronvolts and BTU, with the applied convention shown.
- Force converterConvert newtons, kilograms-force, pounds-force and dynes, using exact factors derived from standard gravity g₀.
- Power converterConvert watts, kilowatts, metric horsepower and imperial horsepower, two “horsepowers” differing by 1.4 %.
- ppm ↔ mg/m³ ↔ mg/L converterppm in air (by volume) to mg/m³, ppm in solution (by mass) to mg/L, two different quantities sharing one name, each with its own parameter.
- Pressure converterConvert pascals, bars, psi, atmospheres, mmHg and torr with exact factors, and know whether your value is absolute or gauge.
- Radioactivity and dose converterConvert becquerels and curies, grays and rads, sieverts and rems, three quantities not to be confused.
- Temperature converterConvert Celsius, Fahrenheit, kelvin and Rankine, with all four scales shown side by side and readings below absolute zero rejected.
- Torque converterConvert newton-meters, kilogram-force centimeters and pound-force feet, without confusing torque and energy.
- Universal unit converterConvert a value between units of length, mass, volume, area, temperature, pressure, time, speed, energy, power, angle or frequency.
- UV dose and irradiance converterConvert mJ/cm², J/m², mW/cm² and W/m², the units of radiometers and photolithography datasheets.
- Viscosity converterConvert dynamic viscosity (Pa·s, cP, poise) and kinematic viscosity (m²/s, cSt, stokes), two distinct quantities.
- Volumetric flow rate converterConvert µL/min, mL/min, L/h and m³/s: the units of syringe pumps, pumps and flow meters.