Units & conversions
Conversions between quantities, units and conventions.
- Bar to psi conversionPressure from bar to psi (pound-force per square inch) and back, with the exact factor.
- Decibel converterdB, dBm, dBµV, dB SPL: ratios, powers, voltages and pressures converted both ways, plus adding two levels, with the factor 10 or 20 according to the quantity.
- Degrees to radians conversionDegrees to radians and back, with the exact π/180 factor, the notable values and the calculator’s angle mode.
- Density converterkg/m³, g/cm³, g/mL and lb/ft³, where 1 kg/m³ is exactly 1 g/L.
- Electrical unit converterVolts, amperes, ohms, farads, henrys, coulombs, mAh and teslas, the full SI prefix range of electronics.
- Energy converterJoules, calories, watt-hours, electronvolts and BTU, with the applied convention shown.
- Force converterNewtons, kilograms-force, pounds-force and dynes, with exact factors derived from standard gravity g₀.
- Power converterWatts, kilowatts, metric horsepower and imperial horsepower, two “horsepowers” differing by 1.4 %.
- ppm ↔ mg/m³ ↔ mg/L converterppm by volume in air to mg/m³, ppm by mass in solution to mg/L, each with its own parameter.
- Pressure converterPascals, bars, psi, atmospheres, mmHg and torr with exact factors, and the difference between absolute and gauge values.
- Radioactivity and dose converterBecquerels and curies, grays and rads, sieverts and rems, three distinct quantities.
- Temperature converterCelsius, Fahrenheit, kelvin and Rankine, all four scales side by side, and readings below absolute zero rejected.
- Torque converterNewton-meters, kilogram-force centimeters and pound-force feet, without confusing torque and energy.
- Universal unit converterA value between units of length, mass, volume, area, temperature, pressure, time, speed, energy, power, angle or frequency.
- UV dose and irradiance convertermJ/cm², J/m², mW/cm² and W/m², the units of radiometers and photolithography datasheets.
- Viscosity converterDynamic viscosity (Pa·s, cP, poise) and kinematic viscosity (m²/s, cSt, stokes), two distinct quantities.
- Volumetric flow rate converterµL/min, mL/min, L/h and m³/s: the units of syringe pumps, pumps and flow meters.