Feet to Meters Converter

Since the International Yard and Pound Agreement of 1959, the international foot has been defined as exactly 0.3048 meters. The yard is exactly 0.9144 meters and the inch is exactly 25.4 millimeters. These are definitions, not measurements, so the conversion carries no uncertainty at all — only the precision you choose to display.

Inverting the definition, 1 meter = 1 ÷ 0.3048 = 3.28083989501 feet, which is 3 feet 3.37 inches. That is why the common shorthand 'a meter is about three and a quarter feet' works so well for rough estimates: the error is under one percent.

The United States maintained a second, slightly different foot until recently. The US survey foot was defined as 1200/3937 meters, making it about two parts per million longer than the international foot. Over a mile the difference is only about 3 millimeters, but across a state plane coordinate system it can amount to a foot or more. The US survey foot was officially retired at the end of 2022, and all new surveying work uses the international foot — but older plats, deeds, and coordinate data may still be on the survey foot, which matters for boundary work.

For quick mental conversion: multiply meters by 3 and add 10%. Ten meters × 3 = 30, plus 10% = 33 feet, against a true 32.81 feet. Going the other way, take feet, subtract 10%, and divide by 3: 100 ft − 10% = 90, ÷ 3 = 30 m, against a true 30.48 m.

Human height is where this conversion is used most. Americans, Britons, and Canadians state height in feet and inches; nearly everyone else uses centimeters. Six feet is 1.8288 meters, or 183 cm. Five foot ten is 177.8 cm. Five foot six is 167.6 cm. Because heights cluster in a narrow band, memorising a handful of anchors covers most conversations.

The arithmetic for a feet-and-inches height is two steps. Convert the whole figure to inches — feet × 12 plus the remaining inches — then multiply by 2.54 to get centimeters. Five foot eleven is (5 × 12) + 11 = 71 inches, and 71 × 2.54 = 180.34 cm. Working from feet alone and treating the inches as a decimal fraction of a foot is the classic error: 5.11 feet is 155.8 cm, nothing like five foot eleven.

This calculator reports both a decimal-feet figure and a feet-and-inches figure precisely so that mistake cannot happen. Enter 1.75 meters and you get 5.7415 feet and 5 ft 8.9 in — the second form is the one to quote to a person, the first is the one to use in a spreadsheet.

Medical, athletic, and identity documents almost always use centimeters internationally, so when filling in a form abroad, round to the nearest whole centimeter. Six feet exactly becomes 183 cm; there is no need to carry decimals.

Metric construction drawings are usually dimensioned in millimeters, not meters, because millimeters remove decimal points and therefore remove a category of error. A 2,400 mm ceiling is 7 ft 10.5 in. A 3,000 mm ceiling is 9 ft 10.1 in. When reading a European or Australian drawing, assume millimeters unless a unit is stated.

American drawings use feet and inches with fractions: 8'-6" means eight feet six inches, or 2.591 m. Fractions run in sixteenths on most trades and in eighths on rough carpentry. Converting to metric produces awkward decimals, which is why projects that cross systems usually pick one and redraw rather than converting field by field.

Standard material sizes rarely map cleanly. A 4×8 sheet of plywood is 1,219 × 2,438 mm, while the metric standard sheet is 1,200 × 2,400 mm — close enough to look interchangeable and far enough apart to leave a visible gap across a wall. Metric studs at 600 mm centres are not the same as 24-inch centres (609.6 mm), and the discrepancy accumulates over a long wall.

As a commercial appraiser I see the consequences of casual conversion in leases and floor plans regularly. When a rentable area is quoted in both square feet and square meters, the two figures frequently disagree by one to two percent because someone converted a rounded number. Always convert from the source dimension, never from a previously rounded conversion.

A warehouse tenant needs 4.5 m of clear height for a racking system. The American landlord's marketing sheet advertises '15 foot clear'. Converting: 15 ft × 0.3048 = 4.572 m. The building clears the requirement by 72 mm — under three inches, which is inside the margin that structural deflection, sprinkler heads, and light fixtures typically consume.

The real check is against the lowest obstruction, not the deck. If sprinkler heads hang 250 mm below the structure, the true clear height is 4.322 m and the racking will not fit. This is the standard failure mode in cross-border industrial deals: the headline number converts fine, but it was never the number that mattered.

Run it the other way for equipment. A machine specified at 3.6 m tall needs 11 ft 9.8 in of clearance plus service space above it. Quoting '12 feet' to the contractor leaves 60 mm, which will not survive contact with reality once a housekeeping pad and levelling feet are added.

The discipline that prevents this: convert to a common unit, add the real-world allowances in that unit, and only convert back at the very end. Adding allowances in one system and converting in another is where the rounding errors compound.

Feet to meters — 1 ft = 0.305 m · 3 ft = 0.914 m · 6 ft = 1.829 m · 10 ft = 3.048 m · 20 ft = 6.096 m · 50 ft = 15.24 m · 100 ft = 30.48 m · 500 ft = 152.4 m · 1,000 ft = 304.8 m.

Meters to feet — 1 m = 3.28 ft · 2 m = 6.56 ft · 5 m = 16.40 ft · 10 m = 32.81 ft · 25 m = 82.02 ft · 50 m = 164.04 ft · 100 m = 328.08 ft · 1,000 m = 3,280.84 ft.

Common heights — 5'0" = 152.4 cm · 5'4" = 162.6 cm · 5'8" = 172.7 cm · 5'10" = 177.8 cm · 6'0" = 182.9 cm · 6'2" = 188.0 cm · 6'4" = 193.0 cm.

Related units — 1 inch = 2.54 cm · 1 yard = 0.9144 m · 1 mile = 1.609 km · 1 km = 0.621 miles · 1 nautical mile = 1.852 km = 6,076 ft.

Aviation is the largest holdout. Altitudes worldwide are given in feet — flight level 350 is 35,000 feet, or 10,668 m — even in countries that are otherwise fully metric. The exceptions are China, North Korea, and Mongolia, which use meters, and Russia, which has moved to feet for flight levels while retaining meters for some approach data. Runway lengths follow the same split.

Mountaineering keeps both systems in parallel. Everest is 8,849 m or 29,032 ft; the 8,000-meter peaks have no imperial equivalent that anyone uses, but American peaks are almost always cited in feet, and the '14ers' of Colorado are defined by a 14,000-foot threshold that has no metric meaning at all.

Diving inverts the pattern: depth is in meters almost everywhere, including on American dive computers, because decompression tables were standardised metrically. Recreational limits of 18 m, 30 m, and 40 m are 59, 98, and 131 feet respectively.

Nautical distance is its own system. A nautical mile is 1,852 meters exactly — originally one minute of latitude — which is 6,076 feet, about 15% longer than a statute mile. A knot is one nautical mile per hour. Converting boat speeds using the statute mile understates them by that same 15%.