A unit converter changes a measurement from one unit to another using a fixed conversion factor — for example, 1 mile = 1.609 kilometers, so 10 miles = 16.09 km. Pick a popular conversion below or use a tool page. Updated June 2026.
Popular conversions
mi → km
km → mi
lb → kg
kg → lb
°C → °F
°F → °C
cm → in
in → cm
ft → m
m → ft
g → oz
oz → g
L → gal
gal → L
mph → km/h
kg → st
st → lb
K → °C
yd → m
cup → ml
Length
mm Millimeters
cm Centimeters
m Meters
km Kilometers
in Inches
ft Feet
yd Yards
mi Miles
nmi Nautical miles
Weight
mg Milligrams
g Grams
kg Kilograms
t Metric tons
oz Ounces
lb Pounds
st Stone
Temperature
°C Celsius
°F Fahrenheit
K Kelvin
Volume
ml Milliliters
L Liters
tsp Teaspoons (US)
tbsp Tablespoons (US)
fl oz Fluid ounces (US)
cup Cups (US)
pt Pints (US)
qt Quarts (US)
gal Gallons (US)
Speed
m/s Meters/second
km/h Kilometers/hour
mph Miles/hour
ft/s Feet/second
kn Knots