Converters transform values between common units such as length and temperature using standard conversion relationships.
Start with the problem, then choose the tool matching your known quantities. Each topic includes an illustrative example and links to the relevant calculators.
Choose the quantity before units. Square the length factor for area and cube it for volume; density relates mass to volume and is not mass alone.
Quick example: One square metre equals 10000 square centimetres; one metre of length equals 100 centimetres.
Convert speed, acceleration, force, torque and pressure in their own units. Torque and energy may both use N·m but are distinct; rpm needs a 2π factor for rad/s.
Quick example: Speed 72 km/h equals 20 m/s.
kW is power and kWh is energy; converting between them needs operating time. Temperature conversion includes an offset and differs from converting a temperature difference.
Quick example: One kWh equals 3.6 million joules; power 1 kW for one hour gives this energy.
Frequency counts cycles per time; flow is volume per time. Fuel consumption L/100 km is reciprocal to efficiency km/L, so conversion is not a fixed multiplication.
Quick example: Efficiency 20 km/L corresponds to consumption 5 L/100 km.
A byte is eight bits; file size differs from transfer rate. Distinguish decimal from binary prefixes and use consistent units when estimating transfer time.
Quick example: 80 megabits/s equals 10 megabytes/s in decimal units, before protocol overhead.
Convert values between length, weight, temperature, and more.
Convert accurately among metres, kilometres, centimetres, feet and inches with explained factors.
°Convert among Celsius, Fahrenheit and kelvin with formulas and absolute-zero validation.
m²Convert area online between m², km², hectares, acres, ft², yd² and cm² using precise factors, including square meters to square feet and hectares to acres.
km/hConvert speed between km/h, mph, m/s, knots and ft/s, with common units shown together for quick comparison.
LConvert liters, milliliters, cubic meters, cubic centimeters, US/UK gallons, cups and fluid ounces with clearly labeled standards.
kgConvert weight and mass online between kg, lb, g, oz, stones, metric tonnes and US short tons using precise factors, including kilograms to pounds and grams to kilograms.
GBConvert between bits, bytes, decimal KB–PB and binary KiB–PiB while keeping SI and IEC definitions explicit.
bar↔psiConvert pressure between Torr, mmHg, psi, bar, atm, Pa, kPa, MPa and other common units with explicit conversion definitions.
J↔kWhCalculate kWh from kW and running hours, solve power or runtime, and convert energy between kWh, Wh, joules, kcal and BTU.
W↔hpConvert W, kW, horsepower and more; calculate kWh from kW and operating hours with the built-in energy estimator.
N↔lbfConvert newtons, kilonewtons, kilogram-force, pound-force, dynes and other force units while clearly separating force from mass.
Hz↔RPMConvert RPM to RPS and Hz, then find angular speed in rad/s or cycle period in seconds. Supports kHz, MHz, GHz, THz and BPM too.
N·mConvert N·m, kN·m, N·cm, lbf·ft, lbf·in, kgf·m, kgf·cm, ozf·in, dyn·cm and other common torque units.
ρConvert kg/m³, g/cm³, g/mL, kg/L, lb/ft³, lb/in³, lb/US gal and other common density units through a clear SI base.
m/s²Convert m/s², standard g, ft/s², in/s², Gal, mGal, km/h/s, mph/s and other acceleration units while preserving sign.
MPG↔L/100Convert US MPG, Imperial MPG, L/100km, km/L and mi/L with explicit US/UK gallon definitions and reciprocal-safe math.
°↔radConvert degrees, radians, gradians, turns, arcminutes, arcseconds and milliradians, with common equivalents shown together.
Mb/sConvert bps, Kbps, Mbps, Gbps and byte-per-second units, including decimal SI and binary IEC prefixes with clear bit-versus-byte handling.
L/minConvert volumetric flow among L/s, L/min, m³/s, m³/h, US/Imperial GPM, ft³/s, ft³/min and barrels/day.
ωConvert angular velocity among rad/s, rad/min, degrees per second or minute, RPM and revolutions per second while preserving signed direction.
Enter a value, choose source and target units, and note that displayed results may be rounded.
Supported units use standard conversion relationships; displayed values may be rounded.
Mihsaba