What a meter-to-foot conversion actually asserts
One meter is 3.280839895013 feet, and that number is a division rather than a measurement. The 1959 international yard and pound agreement fixed the yard at exactly 0.9144 meters, which makes the foot exactly 0.3048 meters. Every foot-to-meter figure on this page is therefore derived from a definition, and the only uncertainty in your answer is the uncertainty in the length you typed in.
That direction of definition surprises people. The United States has not adopted the metric system for everyday use, but it has defined its customary units metrically since 1893, when the Mendenhall Order made the meter and the kilogram the fundamental standards for American weights and measures. The foot is a derived unit of the meter, legally speaking, which is why the conversion factor is exact and why no laboratory anywhere maintains a physical foot.
The converter reports four things because different trades want different forms of the same length. Decimal feet is what surveyors, civil engineers and estimators use, since it adds and multiplies cleanly. Feet-plus-inches is what a carpenter reads on a tape. Yards appear in fabric, concrete and landscaping quantities. Meters is the source or the check, depending on which way you are running.
The formula, and why there are two feet
Divide meters by 0.3048 to get feet; multiply feet by 0.3048 to get meters. To split decimal feet into feet and inches, take the whole number of feet, subtract it, and multiply the leftover fraction by twelve. Yards are feet divided by three, or equivalently meters divided by 0.9144.
The second definition exists because of what the 1959 agreement did to American surveying. Before 1959 the US foot was defined by the 1893 Mendenhall Order as 1200/3937 meters, which is 0.3048006096 m — six ten-millionths of a meter longer than the new international foot. Changing it would have shifted every state plane coordinate in the country, so the United States kept the old value for geodetic and land-survey work and named it the US survey foot. Two feet then coexisted for more than sixty years: the international foot for everything, and the survey foot for land records.
The difference is two parts per million. Across a 100-foot lot line it is 0.0002 ft, which is nothing. Across a 100,000-foot state plane coordinate it is 0.2 ft, which is enough to move a boundary corner. That asymmetry is exactly why the two definitions survived so long: the error is negligible on a building and material on a survey grid.
NIST and the National Geodetic Survey announced the deprecation of the US survey foot, effective at the end of 2022, so all new work uses the international foot. You still need the survey foot to reproduce numbers on older deeds, plats and coordinate systems, which is why it remains an option here.
Worked example: a 100 m building line in feet, both ways
A drawing gives a building line of 100.000 m and the field crew works in feet.
- Divide by the foot. 100 ÷ 0.3048 = 328.083989501 ft. Sanity check: three feet is a shade under a meter, so a hundred meters must be a little over three hundred and twenty-eight feet.
- Split into feet and inches. The whole part is 328 ft. The fraction is 0.083989501 ft; multiply by twelve to get 1.008 inches. So 100 m is 328 ft 1 in to the nearest inch.
- Convert to yards. 328.083989501 ÷ 3 = 109.361 yd.
Now suppose the same line appears on a 1970s plat as 328.08 survey feet, and you need the metric equivalent for a modern coordinate file.
- Multiply by the survey foot. 328.08 × (1200 ÷ 3937) = 328.08 × 0.304800609601 = 99.99998 m.
- Compare with the international foot. 328.08 × 0.3048 = 99.99978 m. The two answers differ by 0.0002 m, or 0.2 mm, over 100 m.
Two tenths of a millimeter over a hundred meters is the whole size of the survey-foot problem at building scale, and it is why nobody on a construction site needs to care. Scale it up: over 30,000 m, roughly the width of a county, the same 2 ppm becomes 60 mm. That is the scale at which the distinction stops being academic.
How to read the result and how far to round
Carry the same number of significant figures you were given, not the number the calculator prints. If a drawing says 3 m, the answer is 9.84 ft and not 9.842520 ft — the extra digits assert a precision the source does not have. Surveying data quoted to the millimeter justifies four decimal places in feet; a tape measurement to the nearest centimeter justifies two.
Decide early whether the job runs in decimal feet or feet-and-inches, and do not mix them in one document. Decimal feet add and multiply without conversion, which is why they dominate site work, earthwork quantities and anything that feeds a spreadsheet. Feet-and-inches match the tools on site. A cut list that mixes 12.75 ft and 12 ft 9 in for the same dimension is how the wrong length gets cut.
For land records, take the foot definition from the document rather than from habit. American plats and deeds written before 2023 are usually in survey feet, and state plane coordinate systems published in feet almost always are. Anything metric, anything international, and anything dated after the deprecation is in international feet. If the document does not say, the two-parts-per-million difference tells you whether it matters: below about 5,000 ft the choice cannot move a number that is quoted to a hundredth of a foot.
Meters to feet reference table
| Meters | Feet (decimal) | Feet and inches | Yards |
|---|---|---|---|
| 1 | 3.280840 | 3 ft 3.37 in | 1.093613 |
| 2 | 6.561680 | 6 ft 6.74 in | 2.187227 |
| 3 | 9.842520 | 9 ft 10.11 in | 3.280840 |
| 5 | 16.404199 | 16 ft 4.85 in | 5.468066 |
| 10 | 32.808399 | 32 ft 9.70 in | 10.936133 |
| 20 | 65.616798 | 65 ft 7.40 in | 21.872266 |
| 25 | 82.020997 | 82 ft 0.25 in | 27.340332 |
| 50 | 164.041995 | 164 ft 0.50 in | 54.680665 |
| 100 | 328.083990 | 328 ft 1.01 in | 109.361330 |
In US survey feet each figure in the second column is smaller by 2 parts per million: 100 m is 328.083333 survey feet against 328.083990 international feet.
Mistakes that put the wrong length on the drawing
- Using 3.28 as the factor on a long dimension. The rounded reciprocal is short by 8 parts per million of a foot per meter; over a kilometer that is 2.6 cm. Use 3.280839895 or, better, divide by 0.3048.
- Treating decimal feet as feet and inches. 12.5 ft is 12 ft 6 in, not 12 ft 5 in. Multiply the decimal part by twelve rather than reading it as inches.
- Mixing survey and international feet in one coordinate file. The 2 ppm offset accumulates with distance from the projection origin and shows up as a systematic shift, not as random noise.
- Rounding before converting. Rounding 3.7 m to 4 m and then converting gives 13.12 ft instead of 12.14 ft. Convert first, round last.
- Carrying six decimals from a two-figure source. A dimension scaled off a drawing is good to a centimeter at best; quoting it as 9.842520 ft claims a precision that does not exist.
- Assuming a yard is a meter. A meter is 9.36 percent longer than a yard, which is 3.37 inches over a single yard and nearly a foot over ten.
Which foot the standards say to use
Use the international foot of exactly 0.3048 m for all new work. NIST and the National Geodetic Survey jointly deprecated the US survey foot with effect from the end of 2022, and modern state plane coordinate definitions are published in international feet or meters. Retain the survey foot only for reproducing values on legacy records: pre-2023 plats, deeds, and coordinate lists whose metadata names it. When a document is silent, the safest test is arithmetic — recompute a published tie distance both ways and see which reproduces the record.
Where this sits among the other length conversions
Meters and feet is the middle of the length range. Below it, shop and drawing dimensions run in millimeters and inches, where the natural tool is the millimeters to inches calculator, and a dimension that has to land on a tape mark belongs in the decimal inches to fraction calculator. Above it, travel and route distances belong in the miles to kilometers calculator, where the exact factor is 1609.344 m to the mile.
Human stature is a special case with its own formatting conventions, handled by the feet and inches to centimeters calculator. Once you square or cube a length the factors change accordingly: area conversions use 0.3048 squared, which the square feet to square meters calculator applies, and volume uses the cube, which is where the cubic yards to cubic feet calculator comes in. Squaring the conversion factor is the step people forget: a 10 percent error in a length becomes a 21 percent error in an area.
For land parcels the useful pairing is feet with acres and hectares, since a lot dimensioned in feet is almost always sold by the acre. The acres to hectares calculator closes that loop, and it is built on the same exact foot: an acre is 43,560 square feet, which is 4046.8564224 square meters.