Convert units of length like meters, feet, miles, kilometers, yards, inches, and more.

Convert Celsius, Fahrenheit, and Kelvin temperature scales.

Convert units of mass like kilograms, pounds, ounces, grams, stone, and more.

Convert liters, gallons (US & Imperial), milliliters, cups, cubic meters, etc.

Convert seconds, minutes, hours, days, weeks, months, and years.

Convert m/s, km/h, mph, knots, feet/second.

Convert square meters, square feet, acres, hectares, square miles, etc.

Convert pascals, psi, bar, atm, torr, millibar, etc.

Convert joules, calories (food & thermo), kWh, BTU, electronvolts, etc.

Convert degrees, radians, gradians, arcminutes, arcseconds, and revolutions.

Convert Hertz (Hz), Kilohertz (kHz), Megahertz (MHz), Gigahertz (GHz), RPM, and rad/s.

Convert Watts, Kilowatts, Horsepower (mechanical & metric), BTU/hour, ft·lbf/s, etc.

Convert Newtons (N), Dynes (dyn), Pound-force (lbf), Kilogram-force (kgf), Poundals (pdl).

Convert kg/m³, g/cm³, lb/ft³, lb/gal (US & Imperial), and other density units.

Convert mol/L (M), mmol/L (mM), µmol/L (µM), mol/m³, lbmol/ft³ for molarity.

Convert Pascals (Pa) for sound pressure, Decibels SPL (dB SPL), Bels SPL, and Nepers (Np).

Convert between wavelength (m, nm, µm), frequency (Hz, MHz, GHz), and photon energy (J, eV).

Convert MPG (US & Imperial), L/100km, km/L, miles/L, etc.

Convert Newton-meters (Nm), pound-force feet (lbf·ft), kgf·m, and other torque units.

Convert W/(m·K), BTU·in/(hr·ft²·°F), kcal/(hr·m·°C), and other thermal conductivity units.

Convert kg·m², g·cm², lb·ft², slug·ft², and other units of rotational inertia.

Convert bytes, KB, MB, GB, TB, bits, Kibibytes (KiB), Mebibytes (MiB), etc.

Convert bps, kbps, Mbps, Gbps, Bps, KBps, MBps, GBps, and their binary equivalents.

Convert pixels (px), points (pt), picas (pc), inches (in), mm, cm, rem, and em. Assumes 16px base for rem/em.

Convert Pixels Per Inch (PPI), Pixels Per Centimeter (PPCM), and Dots Per Inch (DPI).

Convert milliliters, liters, US teaspoons, US tablespoons, US cups, US pints, metric cups, etc.

Convert blood glucose levels between mg/dL (milligrams per deciliter) and mmol/L (millimoles per liter).

Convert international shoe sizes for men and women (US, UK, EU, cm).

Convert cd/m² (nit), stilb (sb), lambert (L), foot-lambert (fL), apostilb (asb).

Convert lux (lx), foot-candle (fc), phot (ph), nox (nx), lm/m², lm/ft².

Convert lumens (lm), candela steradian (cd·sr), and spherical candlepower (scp).

Convert candela (cd), millicandela (mcd), hefnerkerze (HK), international candle.

Convert m³/s, L/min, gal/h (US & Imperial), ft³/min, etc., for volumetric flow rates.

Convert Pascal-seconds (Pa·s), Poise (P), Centipoise (cP), lb/(ft·s), etc.

Convert m²/s, Stokes (St), Centistokes (cSt), ft²/s, in²/s for kinematic viscosity.

Convert Coulombs (C), elementary charge (e), Ampere-hour (Ah), Faraday (F), statcoulomb, abcoulomb.

Convert Henry (H), millihenry (mH), microhenry (µH), nanohenry (nH), abhenry, stathenry.

Convert Farad (F), microfarad (µF), nanofarad (nF), picofarad (pF), abfarad, statfarad.

Convert Tesla (T), Gauss (G), millitesla (mT), microtesla (µT), gamma (γ), and related units.

Convert Becquerel (Bq), Curie (Ci), Rutherford (Rd), dps, dpm for radioactive decay.

Convert Bq/kg, Ci/g, dps/g, and other units for radioactivity per unit mass.

Convert Gray (Gy), Rad, Milligray (mGy), Microgray (µGy), Centigray (cGy), Millirad (mrad).

Convert Light-Years (ly), Parsecs (pc), Astronomical Units (AU), kilometers (km), miles (mi).

Convert coordinates between Decimal Degrees (DD), Degrees Minutes Seconds (DMS), and Degrees Decimal Minutes (DDM).

Convert between Arabic (standard) numbers (1-3999) and Roman numerals (I-MMMCMXCIX).

Convert numbers between Decimal (base 10), Binary (base 2), Hexadecimal (base 16), and Octal (base 8).