Conversions
Conversion tools turn everyday measurements into the unit you need — length, weight, temperature, volume and power. Each converter uses a documented definition (for example, the exact 2.54 cm inch) rather than a rounded rule of thumb.
Tools in this category
19 tools
CM to Inches
Convert centimeters to inches instantly using the exact 2.54 cm/inch definition.
Inches to CM
Convert inches to centimeters using the exact international definition of the inch.
Feet to Meters
Convert feet to metres using the exact international foot of 0.3048 m.
Meters to Feet
Convert metres to feet by dividing by the exact 0.3048 m international foot.
MM to Inches
Convert millimetres to inches using 1 inch = 25.4 mm exactly.
Inches to MM
Convert inches to millimetres by multiplying by the exact 25.4 mm inch.
KG to LBS
Convert kilograms to pounds using the exact international avoirdupois pound of 0.45359237 kg.
LBS to KG
Convert pounds to kilograms with the exact 0.45359237 kg per avoirdupois pound definition.
Grams to Ounces
Convert grams to avoirdupois ounces using 1 oz = 28.349523125 g exactly.
Ounces to Grams
Convert avoirdupois ounces to grams using 1 oz = 28.349523125 g exactly.
KM to Miles
Convert kilometres to international miles using the exact 1 609.344 metre mile.
Miles to KM
Convert international miles to kilometres. One mile is exactly 1.609344 km.
Liters to US Gallons
Convert litres to US liquid gallons (3.785411784 L). Not the Imperial gallon.
US Gallons to Liters
Convert US liquid gallons to litres using 1 US gal = 3.785411784 L exactly.
ML to US Fluid Ounces
Convert millilitres to US fluid ounces (29.5735295625 mL). Not Imperial fl oz.
HP to kW
Convert mechanical horsepower to kilowatts (1 hp = 0.7456998716 kW).
kW to HP
Convert kilowatts to mechanical horsepower using 1 hp = 0.7456998716 kW.
C to F
Convert Celsius to Fahrenheit with the exact formula F = C × 9/5 + 32.
F to C
Convert Fahrenheit to Celsius with C = (F − 32) × 5/9. 32°F is 0°C; 212°F is 100°C.