Measurement
Imperial / metric conversion
Inches to cm, pounds to kg, miles to km — the chart you always need.
Conversions between imperial and metric.
Type a value, pick units
2.54
1 in = 2.54 cm
Bridge conversions
- Length: 1 in = 2.54 cm · 1 ft = 30.48 cm · 1 mi ≈ 1.609 km.
- Mass: 1 oz ≈ 28.35 g · 1 lb ≈ 0.4536 kg · 1 stone = 14 lb ≈ 6.35 kg.
- Volume: 1 fl oz ≈ 29.6 mL · 1 pint (US) ≈ 473 mL · 1 gal (US) ≈ 3.785 L.
Your turn
Someone is 6 ft tall. About how many centimetres is that?
Watch out
Imperial mass words mean different things in the US vs UK (the 'ton', the 'pint', the 'gallon' all differ). Note which system before converting.
Common
- 1 in = 2.54 cm
- 1 ft = 30.48 cm
- 1 mi = 1.609 km
- 1 lb = 0.4536 kg
- 1 gal (US) = 3.785 L