Convert feet to centimetres

One foot is 30.48 centimetres. To convert any amount, multiply by 30.48. Going the other way, one centimetre is 0.032808399 feet.

Multiply the foot figure by 30.48. So cm = ft × 30.48. For a quick mental estimate, multiplying by about 30.5 gets you within a percent or so, which is close enough for most everyday purposes.

One foot is about the length of a standard ruler. The foot is exactly 0.3048 metres. It survives in aviation worldwide — altitudes are given in feet almost everywhere, including in fully metric countries.

One centimetre is about the width of an adult fingernail. The centimetre is the everyday metric unit for body measurements and paper sizes, though it is not an SI-preferred prefix step — engineers tend to jump from millimetres to metres.

Yes. Since the 1959 international yard and pound agreement, the imperial and metric systems are related by exact definitions rather than measurements — the inch is exactly 25.4 mm and the pound exactly 0.45359237 kg. Everything derived from those, including this conversion, is therefore exact. Round at the end rather than partway through, since rounding ft before converting introduces an error the conversion then multiplies.