📏 Length
feet to millimeters Converter
Convert feet to millimeters instantly with a reference conversion table.
Quick answer: To convert feet to millimeters, multiply by 304.8. For example, 1 feet = 304.8 millimeters. Use the calculator below for any value.
feet to millimeters
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Common conversions
| feet | millimeters |
|---|
Formula:
How to convert feet to millimeters
1
Enter your value
Type the number of feet you want to convert into the left box. The result in millimeters appears instantly in the right box. You can also type into the right box to convert in the other direction.
2
Use the swap button
Click the ⇄ Swap button to reverse the conversion — millimeters to feet. Your current value carries across so you don't have to re-enter anything.
3
About feet and millimeters
feet and millimeters are common length measurements.
💡 Did you know?
1 foot = 304.8 mm exactly (since 1959). Standard UK doorframe widths: 686 mm (27 in) or 762 mm (30 in) — the metric versions of old imperial standard sizes. When converting architectural dimensions, always work from mm as the primary unit for precision.
📊 Common conversions at a glance
| feet | millimeters |
|---|---|
| 0.01 | 3.048 |
| 0.1 | 30.48 |
| 0.5 | 152.4 |
| 1 | 304.8 |
| 2 | 609.6 |
| 3 | 914.4 |
Reviewed for 2026. feet ↔ millimeters conversion factor verified against published reference data. Built by a UK-based qualified primary teacher and FA Level 2 coach as part of 247QuickTools' free utility-tools project.