MM to Feet Converter
A foot is exactly 304.8 millimetres, because an inch is defined as exactly 25.4 mm and twelve of them make a foot. Millimetres to feet is therefore one division: feet = mm / 304.8. That makes 304.8 mm exactly 1 ft, 1,828.8 mm exactly 6 ft and 3,048 mm exactly 10 ft, while the round metric numbers come out long: 1,000 mm is 3.28083989501 ft and 1,600 mm is 5.24934383202 ft. The ratio is exact by definition, but 1 / 304.8 does not terminate as a decimal, so most answers are rounded for display, to twelve significant digits here. This page opens the converter with millimetres in the From box and feet in the To box, whatever pair you converted last, and lists the same length in centimetres, metres, kilometres, inches, feet, yards, miles and nautical miles under the answer.
1 mm in every length unit
Common questions
- How many feet is 1 mm?
- 0.00328083989501 ft as this converter prints it, because a foot is 304.8 mm and 1 / 304.8 = 0.003280839895013... The pattern scales by tens: 10 mm is 0.0328083989501 ft, 100 mm is 0.328083989501 ft and 1,000 mm is 3.28083989501 ft. Going back the other way, 1 ft is 304.8 mm and 10 ft is 3,048 mm.
- What is the formula for mm to feet?
- Feet = millimetres / 304.8, and millimetres = feet × 304.8 in the other direction. The 304.8 is not a measurement: an inch is defined as exactly 25.4 mm and a foot is twelve inches, so 12 × 25.4 = 304.8 mm exactly. The division rarely lands on a neat decimal, though, since 1 / 304.8 is a repeating decimal, which is why the answer here is rounded to twelve significant digits.
- Which millimetre values come out as whole feet?
- Every multiple of 304.8. 609.6 mm is exactly 2 ft, 914.4 mm is 3 ft, 1,219.2 mm is 4 ft, 1,828.8 mm is 6 ft, 2,438.4 mm is 8 ft and 3,048 mm is 10 ft, and the converter prints those as 2, 3, 4, 6, 8 and 10 exactly, with nothing to round. A round metric number never does that: 1,000 mm is 3.28083989501 ft and 2,000 mm is 6.56167979003 ft.
- How do I get feet and inches instead of decimal feet?
- Keep the whole feet and multiply what is left by 12. 1,600 mm converts to 5.24934383202 ft, so that is 5 ft plus 0.24934383202 × 12 = 2.99212598425 in, which you would read off a tape as 5 ft 3 in. The list under the answer also gives the length straight in inches, 62.9921259843 in for 1,600 mm, and dividing that by 12 arrives at the same place. The headline box gives feet as one number, never split into feet and inches.
- How tall is 1,700 mm in feet?
- 5.57742782152 ft, which works out as 5 ft 6.92913385827 in, near enough 5 ft 7. Heights convert like any other length: 1,750 mm is 5.74146981627 ft, or 5 ft 8.9 in, and 1,800 mm is 5.90551181102 ft, or 5 ft 10.87 in. Type the millimetres into the From box and the feet update as you type.
- How precise is the result, and what does Copy give me?
- Twelve significant digits, with very small or very large values falling back to exponential notation: 1 mm shows as 0.00328083989501 ft in the headline and as 6.213712e-7 mi in the miles row below it. Copy result copies the headline exactly as printed but without the thousands separators, so 3,048,000 mm hands you 10000 rather than 10,000. The Swap units button turns the page into a feet to millimetres converter without a reload, and the uncommon units switch adds seven more length units, from nanometres to parsecs, to the list.
Conversion factors are the exact legal definitions where one exists. An inch is exactly 2.54 cm and a pound exactly 0.45359237 kg, so those conversions are exact rather than approximate. Temperature uses offsets rather than factors, and that is shown in the working.