Height Converter
Convert height between feet-and-inches and centimetres in either direction, with metres and total inches — handling the composite feet-plus-inches format.
Como usar esta calculadora
- 1Choose whether you're converting to centimetres or to feet and inches.
- 2For feet and inches, enter each part separately.
- 3For centimetres, enter the single value.
- 4Read the converted height, plus metres and total inches.
Como funciona
Height conversion
total inches = feet × 12 + inches centimetres = total inches × 2.54 feet = ⌊total inches ÷ 12⌋, remainder = inches left over 1 inch = 2.54 cm exactly
Converting height between the imperial and metric systems is conceptually simple but practically fiddly because of the composite feet-and-inches format. To go from feet and inches to centimetres, first combine them into a single measurement in inches — multiply the feet by twelve and add the inches — then multiply by 2.54, the exact number of centimetres in an inch. To go the other way, divide the centimetres by 2.54 to get total inches, then split that back into whole feet and leftover inches by dividing by twelve and keeping the remainder. This two-step combine-then-convert-then-split process is what trips up generic length converters, which handle single units cleanly but stumble on the feet-plus-inches pairing that height is usually quoted in. The 2.54 factor is not an approximation: since 1959 the inch has been defined as exactly 2.54 centimetres, so the conversion is precise.
Exemplo resolvido
A height of 5 feet 10 inches is 5 × 12 + 10 = 70 inches, and 70 × 2.54 = 177.8 centimetres, or about 1.78 metres. Going the other way, 178 centimetres is 178 ÷ 2.54 ≈ 70.08 inches, which splits into 5 feet and about 10 inches.
Height Converter: o guia completo
Why height conversion is trickier than it looks
Converting a height sounds like it should be trivial — multiply by a single factor and you are done. What makes it fiddly is that the imperial way of expressing height combines two different units at once: feet and inches, like 5 feet 10 inches. This composite format cannot be converted in one step, because you cannot simply multiply 'feet 10' by anything. The number must first be flattened into a single unit — total inches — before the conversion factor can be applied, and the result often needs splitting back into feet and inches afterward if the answer is wanted in imperial form.
This is exactly where general-purpose unit converters, which are built to convert one unit to another, tend to fall short for height. Ask a basic converter to turn '5 feet 10 inches' into centimetres and it may only accept one field. A dedicated height converter handles the combine-and-split steps automatically, which is why height gets its own tool despite being 'just' a length conversion. The underlying arithmetic is simple, but the packaging of feet-plus-inches is what makes a purpose-built converter genuinely more convenient than a generic one.
The two measurement worlds
Height conversion is so commonly needed because the world is split between two systems of measuring it. The United States and, informally, the United Kingdom and a few other places express personal height in feet and inches — someone is 'five ten' or 'six foot two'. Almost everywhere else, and in all scientific and medical contexts, height is given in centimetres or metres. Anyone moving between these worlds — travelling, filling in forms, comparing notes, reading a passport or medical record from another country — runs into the need to convert.
The metric expression of height is arguably tidier, a single number in centimetres, while feet and inches carry the legacy of body-based units where a foot was roughly a foot and an inch roughly a thumb-width. Neither is going away soon, so fluency in converting between them is a practical everyday skill. Knowing a few anchor points helps: 5 feet is about 152 cm, 5 feet 10 is about 178 cm, and 6 feet is about 183 cm, with each inch adding 2.54 cm. These landmarks let you sanity-check a conversion and develop an intuitive feel for heights quoted in the unfamiliar system.
The exact inch and metric precision
A satisfying detail behind height conversion is that it is exact, not approximate. Since an international agreement in 1959, the inch has been defined as precisely 2.54 centimetres — a clean, exact relationship rather than a rounded figure. This means every inch-to-centimetre conversion is perfectly accurate at the definition level, and any imprecision in a converted height comes only from rounding the final display, not from the conversion factor itself. Twelve inches make a foot, so a foot is exactly 30.48 centimetres.
This exactness reflects a broader tidiness in how units relate. The metric system's own internal relationships are exact powers of ten — 100 centimetres to a metre, 1000 metres to a kilometre — which is much of its appeal. Bridging metric and imperial used to involve messier historical definitions, but the modern convention of defining the inch, foot, and mile exactly in terms of the metre removed that awkwardness. So while feet and inches feel old-fashioned next to centimetres, the two systems are now locked together by exact definitions, and a height converted from one to the other loses no accuracy in the process — only the rounding you choose for readability.
Perguntas frequentes
How do I convert feet and inches to centimetres?
Combine them into total inches first (feet × 12 + inches), then multiply by 2.54. So 5 feet 10 inches is 70 inches, and 70 × 2.54 = 177.8 cm. You can't convert feet and inches in one step because they're two units mixed together.
How do I convert centimetres to feet and inches?
Divide the centimetres by 2.54 to get total inches, then split: the whole number of feet is total inches ÷ 12, and the remainder is the leftover inches. 178 cm ÷ 2.54 ≈ 70.1 inches, which is 5 feet and about 10 inches.
How many centimetres is 5 foot 10?
About 177.8 cm. That's 5 × 12 + 10 = 70 inches, times 2.54 cm per inch. For quick reference, 5 feet is about 152 cm, 6 feet is about 183 cm, and each additional inch adds 2.54 cm.
Is one inch exactly 2.54 cm?
Yes, exactly. Since a 1959 international agreement, the inch has been defined as precisely 2.54 centimetres — not a rounded approximation. So height conversions are exact at the definition level; any imprecision comes only from rounding the final displayed number.