All unit converters
632 units across 64 categories. Every converter includes an X/Y graph, the conversion formula, and a table of the value in every related unit.
Length & Distance
Metres, miles, feet, inches, light years and 20 more.
Weight & Mass
Kilograms, pounds, stones, ounces, tonnes and troy weights.
Temperature
Celsius, Fahrenheit, Kelvin, Rankine and historic scales.
Area
Square metres, acres, hectares plus Indian land units.
Volume & Capacity
Litres, gallons, cubic feet, barrels — US and imperial.
Time
Seconds, hours, weeks, years and everything between.
Speed & Velocity
km/h, mph, knots, mach and the speed of light.
Pressure
Bar, psi, pascal, atmospheres, mmHg and inHg.
Energy & Work
Joules, calories, kWh, BTU, electronvolts and TNT.
Power
Watts, kilowatts, horsepower, BTU/h and tons of cooling.
Data Storage
Bytes, KB, MB, GB, TB plus the binary KiB/MiB/GiB.
Data Transfer Rate
Mbps to MB/s — the eight-times difference that catches everyone.
Cooking & Kitchen
Cups, spoons, sticks of butter, millilitres.
Fuel Economy
MPG, L/100 km, km/L — including the US/UK gallon gap.
Numbers (Lakh, Crore, Million)
Lakh, crore, million, billion, dozen and gross.
Shoe Size
US, UK, EU, Japan and foot length in cm.
Ring Size
US sizes, inner circumference and diameter.
Fabric & Paper Weight (GSM)
GSM, oz/yd² and US paper basis weights.
Angle
Degrees, radians, gradians, arcminutes and turns.
Frequency
Hertz, kHz, MHz, GHz, RPM and rad/s.
Force
Newtons, pound-force, kilogram-force, dynes.
Torque
Newton-metres, pound-feet, kgf·m for spanner specs.
Acceleration
m/s², g-force, ft/s² and 0-60 style rates.
Density
kg/m³, g/cm³, lb/ft³ and pounds per gallon.
Flow Rate
Litres per minute, GPM, CFM, cubic metres per hour.
Mass Flow Rate
kg/s, kg/h, tonnes per hour and pounds per hour.
Running Pace
min/km, min/mile and speed — for runners and cyclists.
Typography
Points, picas, pixels, twips and millimetres.
Image Resolution
DPI, PPI, dots per centimetre and per millimetre.
Temperature Difference
A change of 1 °C versus 1 °F, without the zero-point offset.
Thermal Conductivity
W/(m·K), BTU/(h·ft·°F) and the insulation k-value.
Specific Heat Capacity
J/(kg·K), kJ/(kg·K), cal/(g·°C) and BTU/(lb·°F).
Heat Flux Density
W/m², BTU/(h·ft²) and kW/m² for heat and solar load.
Heat Transfer Coefficient (U-value)
U-values in W/(m²·K) and BTU/(h·ft²·°F).
Thermal Resistance (R-value)
R-value, RSI, tog and clo for insulation and bedding.
Specific Energy
Wh/kg for batteries, MJ/kg and BTU/lb for fuels.
Specific Volume
m³/kg, L/kg, ft³/lb — the inverse of density.
Moment of Inertia
kg·m², lb·ft², lb·in² and slug·ft².
Momentum & Impulse
kg·m/s, N·s, lb·ft/s and dyn·s.
Surface Tension
N/m, mN/m, dyn/cm and lbf/in.
Electric Current
Amperes, milliamps, microamps and CGS units.
Voltage
Volts, millivolts, kilovolts and megavolts.
Electrical Resistance
Ohms, kilohms, megohms and milliohms.
Electric Conductance
Siemens, millisiemens, microsiemens and mhos.
Electrical Conductivity
S/m, mS/cm, µS/cm and dS/m for water and soil.
Electric Field Strength
V/m, kV/m, kV/mm and V/in.
Capacitance
Farads, microfarads, nanofarads, picofarads.
Inductance
Henries, millihenries, microhenries.
Electric Charge
Coulombs, amp-hours, mAh battery capacity.
Magnetic Flux Density
Tesla, gauss, millitesla and milligauss.
Magnetic Flux
Webers and maxwells.
Magnetic Field Strength
Amperes per metre and oersteds.
Illuminance
Lux, foot-candles and phot.
Luminance
Nits, candela per m², foot-lamberts.
Luminous Intensity
Candela, millicandela and candlepower.
Radioactivity
Becquerels, curies and their multiples.
Radiation Dose
Sievert, millisievert, rem, gray and rad.
Radiation Exposure
Roentgen, milliroentgen and coulombs per kilogram.
Amount of Substance
Moles, millimoles and pound-moles.
Molar Concentration
Molar, millimolar, micromolar, mol/m³.
Percentage & Parts
Percent, per mille, ppm, ppb and basis points.
Blood Sugar
mg/dL to mmol/L for glucose readings.
Dynamic Viscosity
Pascal-seconds, poise, centipoise.
Kinematic Viscosity
Stokes, centistokes, m²/s.