Feet to Inches, Centimeters & Millimeters – Reference
All three outputs scale from the same base foot: ×12 (in) → ×30.48 (cm) → ×304.8 (mm). Millimeters simply add a ×10 factor to centimeters.
Formulas
- in = ft × 12
- cm = ft × 30.48
- mm = ft × 304.8
- ft = in ÷ 12 = cm ÷ 30.48 = mm ÷ 304.8
Quick Values
1 ft = 12 in = 30.48 cm = 304.8 mm · 6 ft = 72 in = 182.88 cm = 1828.8 mm.
Example (5 ft)
- Inches = 5 × 12 = 60
- Centimeters = 5 × 30.48 = 152.4
- Millimeters = 5 × 304.8 = 1524
- Result: 5 ft = 60 in = 152.4 cm = 1524 mm
Uses
- Precision machining (mm) vs layout framing (ft / in)
- Design drawings mixing imperial & metric
- Packaging dimension conversions
Accuracy & Tips
- Retain full integer mm when possible—no rounding needed
- Head memory: 3 ft ≈ 0.9144 m → 91.44 cm → 914.4 mm
- Derive mm via cm × 10 to reduce calculator steps
More Examples
| Feet | Inches | Centimeters | Millimeters |
|---|
| 2 | 24 | 60.96 | 609.6 |
| 6 | 72 | 182.88 | 1828.8 |
| 10 | 120 | 304.8 | 3048 |
FAQ
- Why 304.8 mm? 12 in × 25.4 mm.
- Convert 8 ft to mm? 8 × 304.8 = 2438.4 mm.
- Better to go ft→in→mm? Direct multiplier is faster.