Convert feet and inches to millimetres and reverse. Essential for engineers, architects, and builders working across metric and imperial systems. 1 foot = 304.8mm exactly.
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Conversion Formula
1 foot = 304.8 mm (exact) 1 inch = 25.4 mm (exact)
feet+inches to mm: (ft × 304.8) + (in × 25.4) mm to feet: mm ÷ 304.8
Quick Reference
1 foot
304.8 mm
5 feet
1524 mm
6 feet
1828.8 mm
8ft × 4ft
2438 × 1219 mm
5 ft 11 in
1803.4 mm
6 ft 0 in
1828.8 mm
Frequently Asked Questions
1 foot equals exactly 304.8 millimetres. This is a fixed international conversion used in engineering and construction worldwide.
Indian construction drawings often mix imperial (feet/inches) plot dimensions with metric (mm) structural drawings, especially for older properties or international project collaboration, making accurate conversion essential.