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Use 423 calculators, converters, text, file and developer utilities directly in your browser without installing software or creating an account.
Length Converter
Convert mm, cm, m, km, in, ft, yd, mi, and nautical miles within the same physical quantity of length.
Area Converter
Convert area among mm², cm², m², ha, km², in², ft², and acres.
Volume Converter
Convert volume among mL, L, m³ and US tsp, tbsp, fl oz, cup, pint, and gallon.
Weight Converter
Convert mass among mg, g, kg, metric tonnes, oz, lb, and stone using kilograms as the reference.
Speed Converter
Convert speed among m/s, km/h, mph, knots, and ft/s through an m/s reference.
Temperature Converter
Convert Celsius, Fahrenheit, and kelvin with both scale factors and zero-point offsets.
Time Unit Converter
Convert duration among ms, s, min, h, day, week, and a mean 365.2425-day year.
Pressure Converter
Convert pressure among Pa, kPa, MPa, bar, atm, psi, and mmHg using pascals as the reference.
Energy Converter
Convert energy among J, kJ, cal, kcal, Wh, kWh, and BTU using joules as the reference.
Power Converter
Convert power among W, kW, MW, mechanical hp, metric PS, and BTU/h.
Data Storage Converter
Convert data size among bits, bytes, decimal KB/MB/GB/TB, and binary KiB/MiB/GiB.
Angle Converter
Convert plane angle among degrees, radians, gradians (gon), turns, and arcminutes.
Force Converter
Convert force among N, kN, dyne, kgf, and lbf using the newton as the reference.
Frequency Converter
Convert repetition frequency among Hz, kHz, MHz, GHz, and rpm using hertz as the reference.
Torque Converter
Convert torque among N·m, kN·m, kgf·m, lbf·ft, and lbf·in using N·m as the reference.
Density Converter
Convert density among kg/m³, g/cm³, g/mL, and lb/ft³ using kg/m³ as the reference.
Acceleration Converter
Convert acceleration among m/s², standard gravity g, ft/s², and Gal.
Flow Rate Converter
Convert volumetric flow among L/s, L/min, m³/h, and US gpm using L/s as the reference.
Fuel Economy Converter
Convert fuel economy among km/L, L/100km, US mpg, and UK mpg, including the reciprocal L/100km relationship.
Illuminance Converter
Convert illuminance among lux, foot-candles, phot, and nox using lux as the reference.
Luminance Converter
Convert luminance among cd/m² (nit), foot-lambert, and stilb using cd/m² as the reference.
Dynamic Viscosity Converter
Convert dynamic viscosity among Pa·s, cP, P, and lb/(ft·s) using Pa·s as the reference.
Voltage Converter
Convert voltage among µV, mV, V, and kV using SI decimal prefixes.
Electric Current Converter
Convert electric current among µA, mA, A, and kA with ampere-based SI prefixes.
Resistance Converter
Convert electrical resistance among mΩ, Ω, kΩ, and MΩ using ohms as the reference.
Capacitance Converter
Convert capacitance among pF, nF, µF, mF, and F using farads as the reference.
Electric Charge Converter
Convert electric charge among C, mC, Ah, mAh, and elementary charges e using coulombs as the reference.
Magnetic Flux Converter
Convert magnetic flux among Wb, mWb, and maxwell using the weber as the reference.
Magnetic Field Converter
Convert magnetic flux density among T, mT, µT, and gauss using tesla as the reference.
Radioactivity Converter
Convert radioactive activity among Bq, kBq, MBq, and Ci using becquerels as the reference.
Radiation Dose Converter
Convert absorbed radiation dose among Gy, mGy, and rad using gray as the reference.
Sound Intensity Converter
Convert sound intensity among W/m², mW/m², and µW/m² using W/m² as the reference.
Typography Unit Converter
Convert CSS px, pt, pc, in, cm, and mm using the CSS reference of 96 px per inch.
Print Resolution Converter
Convert print/sample density among dpi, dpcm, and dpm using dots per inch as the reference.
Concentration Converter
Convert dimensionless concentration ratios among %, ‰, ppm, and ppb using percent as the reference.
Molar Mass Converter
Convert molar mass among g/mol, kg/mol, and mg/mol by changing SI prefixes.