How this instrument works
Construction and real estate in the United States describe headroom, doorway widths and ceiling heights as a count of feet with a smaller inch remainder, never as a metre decimal — a contractor marking a stud wall works from a tape graduated in feet and inches, not metres. Converting a metric dimension for that audience means dividing by 0.3048 metres per foot, keeping the whole number of feet, and turning the leftover fraction into inches, so the result reads the way a US building inspector or buyer expects it.
The 0.3048 m foot has been exact rather than approximate since 1 July 1959, when standards bodies across six English-speaking countries agreed an international yard of 0.9144 m. That single agreement is why a metre-to-feet conversion carries no measurement tolerance: the only imprecision left is the rounding shown on screen, not anything physical about the length itself.
This particular conversion turns up constantly in property listings translated between metric and imperial markets. A European estate agent's floor plan states a sloped attic ceiling's lowest clearance, a stairwell width, or a room's shortest wall in metres; a US-based buyer or contractor needs that same figure in feet and inches to compare it against local building-code minimums, furniture dimensions, or simply their own sense of scale.
- Enter the measurement in metres into the Height (m) field — it starts at 1.75 m as an example.
- Read the Feet field for the whole number of feet contained in that length, rounded down.
- Read the Inches field for what's left over, shown as inches to two decimal places.
- Treat Feet and Inches as one answer — '5 ft 8.90 in' — not as two separate results to pick between.
- For a US contractor's tape, round the Inches decimal to the nearest sixteenth by multiplying it by 16.
Worked example — a 1.75 m loft headroom clearance
A UK property listing for a loft conversion states the head height at the lowest point of the sloped ceiling as 1.75 m, a figure that matters because UK building guidance treats headroom below about 1.5 m as unusable floor area for a habitable room. Entering 1.75 into Height (m) gives 1.75 ÷ 0.3048 = 5.74146981627 feet total. The Feet field floors that to 5, and the Inches field converts the remaining 0.74146981627 feet into inches, 8.89763779528, which the calculator displays as 8.90.
Read together, the loft's lowest clearance is 5 ft 8.90 in — enough for most adults to stand upright at that point without stooping, though a US buyer comparing it against a local code minimum (commonly around 6 ft 8 in at the tallest point, less at the eaves) would still want the full ceiling profile, not just this one measurement.
Questions
Why does the tool split one metre figure into two output fields?
Because feet and inches are read as a pair in US building contexts, the way a duration is read as hours and minutes rather than as a decimal hour. The Feet field is always the whole number of feet contained in the metre length; the Inches field is only the leftover, expressed in inches. Neither field alone answers the question — a contractor needs both to mark a tape correctly.
Is a metre-to-feet conversion exact, or does it involve rounding?
The underlying conversion is exact: 1 foot has equalled 0.9144 ÷ 3 = 0.3048 m precisely since the 1959 international yard agreement between the US, UK, Canada, Australia, New Zealand and South Africa. What you see rounded to two decimal places in the Inches field is display precision only — the calculator computes the full, unrounded value internally before it ever gets displayed.
Why might the Inches field round up to 12.00?
That's a display artefact rather than a mistake: an unrounded value such as 11.997 inches rounds to 12.00 at two decimal places even though the Feet field was already correctly floored using the full-precision total. If you ever see 12.00 in the Inches field, the true value sits fractionally below a full extra foot, not above it.
How would I check this conversion by hand on site?
Multiply the metre figure by 3.2808398950131 (the number of feet in one metre) to get total feet as a decimal, subtract the whole feet, then multiply what's left by 12. For 1.75 m: 1.75 × 3.28083989501 = 5.74146981627 feet, giving the same 5 ft 8.90 in as the calculator, since both routes rely on the identical 0.3048 m definition.
Does this differ from converting centimetres instead of metres?
Only in the units you start with — the underlying arithmetic is the same length conversion once the input is expressed in metres, since a centimetre figure is simply divided by 100 first. Floor plans, ceiling heights and door widths in property listings are almost always given in metres directly, which is why this tool takes metres rather than centimetres as its input.
Why do US building codes still use feet and inches at all?
Building codes, framing lumber, door and window sizes, and most trade tools in the US were standardized around the foot-and-inch system long before metrication debates began, and the construction trades never switched. A 2×4 stud, an 80-inch door, and an 8-foot ceiling are trade sizes baked into US manufacturing, so a metric floor plan has to be translated into these units before a US contractor can use it directly.