Feet to Millimeters
Convert international feet to millimeters. One foot is exactly 304.8 mm. Type a decimal foot. Feet plus leftover inches as two fields belong on the height converter.
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How to convert feet to millimeters
- Enter the length in feet. Use a decimal for leftover inches.
- Keep From as Feet and To as Millimeters, or pick centimeters.
- Read millimeters. Multiply feet by 304.8.
- Swap units to convert millimeters back to feet. Feet to centimeters uses 30.48 instead of 304.8.
International foot
Length (SI meter)
| Foot | 1 ft = 0.3048 m = 304.8 mm exactly |
|---|---|
| Millimeter | 1 mm = 0.001 m |
| Centimeter | 1 ft = 30.48 cm |
| Inch | 1 in = 25.4 mm, 12 in = 1 ft |
| Metre | 1 m = 1000 mm = about 3.28084 ft |
| Height pair | Two fields on the height converter |
What feet to millimeters does
This spoke starts at feet and targets millimeters. Because 1 ft = 0.3048 m, the millimeter figure is 304.8 with an exact factor. Shop drawings in millimeters can read a 2.5 ft clearance as 762 mm. The centimeter sibling is feet to cm.
Foot to millimeter factor
mm = ft × 304.8. ft = mm / 304.8. cm = ft × 30.48. in = ft × 12. Convert leftover inches first: (feet × 12 + inches) × 25.4 mm, or (feet + inches/12) × 304.8 mm.
Millimeters in shops versus decimal feet
CNC and metric print callouts want millimeters. US architectural notes still use feet and inches. This page is the bridge when you already have a decimal foot. It will not parse 5'-10" as a string.
When to convert feet to millimeters here
Turn a 4 ft sheet into 1219.2 mm, check a clearance, or swap to centimeters. Use inches to mm when the tape is already in inches.
What this page does not do
It does not parse feet-inch notation. It does not convert the survey foot. Input stays in this tab.