Convert feet to millimeters

1 ft=304.8mm

Use the converter below to change any feet value into millimeters instantly — with formula, conversion table, and real-world examples.

You have

Equals

304.8

Conversion formula

Forward

millimeters = feet × 304.8

Reverse

feet = millimeters × 0.003281

Example: 10 ft × 304.8 = 3,048 mm.

About both units

From

Foot

The foot equals 30.48 centimeters exactly and is one of the oldest length units in human history. It is the international aviation standard for altitude — commercial airliners cruise at 35,000 feet. In the US, building dimensions, human height and elevation are all expressed in feet. 1 foot = 12 inches.

Real-world: Airliners cruise at 35,000 ft (10.7 km). Mount Everest is 29,032 ft (8,849 m). A standard US ceiling is 8 ft (2.44 m).

Read full foot reference →

Millimeter

The millimeter equals one thousandth of a meter and is essential in precision engineering, manufacturing and rainfall measurement. A 10-millimetre rainfall is a moderate shower; over 50 mm in a day is classified as heavy. Machined parts, screws and PCB dimensions are all given in mm.

Real-world: A 2 euro coin is 25.75 mm across and 2.2 mm thick. Rainfall of 50 mm in 24 h is a red-warning event in most of Europe.

Read full millimeter reference →

Foot to Millimeter conversion table

Common feet to millimeters values for quick reference.

Foot (ft)	Millimeter (mm)
1 ft	304.8 mm
5 ft	1,524 mm
10 ft	3,048 mm
25 ft	7,620 mm
50 ft	15,240 mm
100 ft	30,480 mm
250 ft	76,200 mm
500 ft	152,400 mm
1,000 ft	304,800 mm
5,000 ft	1,524,000 mm

Tips & common mistakes

Quick tips

1 foot = 12 inches = 30.48 cm exactly. Knowing feet gives you inches instantly.
For a quick metric estimate, multiply feet by 0.3 — 10 ft ≈ 3 m.
Pilots and air-traffic control use feet globally, even over metric countries.

Avoid these

Writing "6.2 ft" to mean "6 feet 2 inches" — the decimal form is 6.167 ft, not 6.2.
Confusing feet (length) with square feet (area) in US real-estate listings.
Using 0.3 instead of 0.3048 on structural drawings — errors accumulate on multi-storey buildings.

Frequently asked questions

How many millimeters in a foot?

One foot equals 304.8 millimeters.

How do I convert feet to millimeters?

Multiply the foot value by 304.8 to get the equivalent in millimeters.

What is 100 feet in millimeters?

100 feet equals 30,480 millimeters.

Is a foot bigger than a millimeter?

Yes. 1 foot equals 304.8 millimeters, so one foot is larger.

How to convert feet to millimeters without a calculator?

Multiply by 304.8 for a quick estimate; use a calculator for precise results.

Related length conversions

📊 See full comparison matrix →

Conversions in other categories

WeightKilogram → Pound TemperatureCelsius → Fahrenheit VolumeLiter → US Gallon AreaSquare Meter → Square Foot SpeedKilometer per Hour → Mile per Hour EnergyKilojoule → Kilocalorie PressureBar → Pound per Square Inch PowerKilowatt → Mechanical Horsepower