Length
mm, cm, m, km, inches, feet, miles.
Weight & Mass
g, kg, oz, lb, stones, tonnes.
Volume
ml, litres, gallons, cups, pints.
Temperature
Celsius, Fahrenheit, Kelvin.
Speed
mph, km/h, m/s, knots.
Area
m², ft², acres, hectares.
Cubic Volume
m³, ft³, yd³, litres.
Digital Storage
KB, MB, GB, TB, KiB, MiB.
Data Transfer
Mbps, MB/s and more.
Pressure
bar, psi, kPa, atm, mmHg.
Energy
J, kJ, cal, kcal, kWh, BTU.
Cooking
tsp, tbsp, cups, ml.
Time
seconds, minutes, hours, days.
Flow Rate
L/min, GPM, CFM, m³/h.
Illumination
lux, foot-candles, phot.
Land Area
acres, hectares, roods.
Running Pace
min/km, min/mile, speed.
Calendar Time
days, weeks, months, years.
Free online unit converters
Convert between metric and imperial units instantly with this complete set of free unit converters. Whatever you need to convert — length, weight, volume, temperature, speed, area, data, pressure, energy, or cooking measures — pick a converter, type your value, and the answer updates as you type. Every tool keeps US and UK units accurate and separate where they differ.
Metric and imperial made easy
Switching between systems is one of the most common everyday calculations — for travel, cooking, DIY, study, and international shopping. These converters use precise conversion factors and let you swap the direction with one click, so you always get an exact result.