Feet to MM Converter
Convert foot to millimeter instantly. 1 ft = 304.8 mm, worked steps and a full reference table.
How to use it
- Type the value in foot — the result updates as you type.
- Use Swap to flip the direction, or change either dropdown to convert between any two units.
- Click the result to copy it. The URL updates too, so you can bookmark or share the exact conversion.
Examples
| 1 ft | 304.8 mm |
| 5 ft | 1524 mm |
| 10 ft | 3048 mm |
| 100 ft | 30480 mm |
One foot equals 304.8 millimeters (mm). To convert feet to millimeters, multiply by 304.8; to go back the other way, multiply by 0.0032808399 instead.
The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.
What feet and millimeters actually measure
Foot (ft) — A foot is twelve inches, or exactly 0.3048 metres. Heights, room dimensions, aviation altitude and property listings in the US and UK.
Millimeter (mm) — A millimetre is a thousandth of a metre, and the smallest division on a normal ruler. Engineering drawings, timber and steel sizes, rainfall and screen bezels.
Feet to MM conversion table
The most common values, worked out in advance. Anything not listed can be typed straight into the converter.
| ft | mm |
|---|---|
| 1 ft | 304.8 mm |
| 2 ft | 609.6 mm |
| 5 ft | 1524 mm |
| 10 ft | 3048 mm |
| 25 ft | 7620 mm |
| 50 ft | 15240 mm |
| 100 ft | 30480 mm |
How to convert feet to millimeters by hand
Multiply the number of feet by 304.8.
For example, 25 ft × 304.8 = 7620 mm.
Going the other way, divide by 304.8 — or multiply by 0.0032808399, which is the same thing and easier to do in your head.
Everything runs in your browser
There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.
Questions people ask
How many mm are in 1 ft?
1 ft equals exactly 304.8 mm. Multiply any value in foot by 304.8 to get millimeter.
Is anything uploaded to a server?
No. The whole calculation happens in your browser. Nothing is sent anywhere, and the page keeps working offline once loaded.
Last updated 18 August 2026