Meters to Feet

To go from meters to feet, multiply by 3.2808: 10 m × 3.2808 ≈ 32.8 ft. To reverse it, divide by 3.2808, or multiply by 0.3048. The foot is defined as exactly 0.3048 m, so the relationship itself contributes no error. That number is not a measurement — it descends from the 1959 international yard and pound agreement, which fixed the yard at exactly 0.9144 m. Divide by three and you get the foot; divide by twelve more and you get the inch at exactly 2.54 cm. Feet → meters therefore terminates exactly, while meters → feet is a repeating decimal (3.280839895...). A workable mental shortcut: multiply by 3 and add 10%. For 10 m that gives 30 + 3 = 33 ft against a true 32.81 — about 0.6% high, fine for pacing out a room.

Feet almost never come out whole, and "32.8 feet" is not how anyone speaks. Keep the whole feet, then multiply the decimal part by 12 to get inches: 32.8 ft is 32 ft plus 0.8 × 12 ≈ 10 in, so 32 ft 10 in. The critical thing is that 32.8 ft is *not* 32 ft 8 in. Decimal feet and the feet-and-inches notation look similar and mean different things — 32 ft 8 in is 32.67 ft. Mixing them up is a common and expensive error on drawings. Human heights, which is what most people actually want: 1.60 m ≈ 5'3"; 1.65 m ≈ 5'5"; 1.70 m ≈ 5'7"; 1.75 m ≈ 5'9"; 1.80 m ≈ 5'11"; 1.85 m ≈ 6'1"; 1.90 m ≈ 6'3". The rest of the ladder: 3 feet make a yard, and 5,280 feet make a statute mile.

For decades the United States quietly ran two feet. The international foot of exactly 0.3048 m covered ordinary use, while land surveying kept an older US survey foot of 1200/3937 m — larger by roughly two parts per million. On December 31, 2022, NIST and the National Geodetic Survey formally retired the survey foot, leaving a single definition for all purposes. Two parts per million sounds like nothing, and on a tape measure it is: about 0.6 mm over 300 m. But state plane coordinate systems place points hundreds of thousands of feet from their origin, and there the discrepancy grows to a foot or more — enough to move a legal property corner. If you are reading survey data recorded before 2023, it is worth checking which foot it used.

Aviation is the one place where feet are close to universal, even in countries that are otherwise fully metric. Altitudes and flight levels are reported in feet almost everywhere, so a cruising FL350 is 35,000 ft, which is 10,668 m. Cabin announcements in metric countries routinely convert on the fly. Elevation is where the two systems collide most visibly. Everest at about 8,849 m is just over 29,000 ft; Denali at 6,190 m is about 20,310 ft; the mile-high marker in Denver sits at 5,280 ft, which is 1,609 m — the same 1,609 that shows up in the mile-to-kilometer factor, for exactly the same reason. Diving runs the other way: recreational depth limits are quoted in meters in most of the world and in feet in the US, so the familiar 40 m recreational limit is 130 ft.

This is the mistake that ruins flooring estimates. To convert square meters to square feet you square the length factor: 1 m² = 3.2808² = 10.764 ft². For volume you cube it: 1 m³ = 35.315 ft³. So a 50 m² apartment is about 538 ft², not 164 ft². And a 12 ft × 15 ft room, at 180 ft², is 16.7 m² — using 3.2808 once instead of twice understates or overstates the answer by a factor of more than three. Quick references for length: 1 m = 3.28 ft; 2 m = 6.56 ft; 5 m = 16.40 ft; 10 m = 32.81 ft; 100 m = 328.08 ft (which is why a 100 m sprint is often described as "about 109 yards"). Going the other way: 6 ft = 1.83 m; 10 ft = 3.05 m; 100 ft = 30.48 m.