Mile/Hour to Foot/Second (mph to ft/s)
Result
1.466666667 Foot/Second
Formula
ft/s = mph × 1.466666667
1 mph = 1.466666667 ft/s, and 1 ft/s = 0.6818181818 mph.
Speed units are a length divided by a time: 1 km/h = 1/3.6 m/s, 1 mph = 0.44704 m/s exactly, and 1 knot = 1 nautical mile per hour = 1,852/3,600 m/s.
Worked examples
- 1 mph × 1.466666667 = 1.4666667 ft/s
- 10 mph × 1.466666667 = 14.666667 ft/s
- 100 mph × 1.466666667 = 146.66667 ft/s
Common mistakes
- A knot is a nautical mile per hour, so 1 kn = 1.852 km/h and 1.15078 mph — not 1 mph.
- Weather services quote wind in km/h, m/s, mph or knots depending on country; check the unit before comparing forecasts.
Mile/Hour to Foot/Second table
| Mile/Hour (mph) | Foot/Second (ft/s) |
|---|---|
| 1 | 1.4666667 |
| 2 | 2.9333333 |
| 5 | 7.3333333 |
| 10 | 14.666667 |
| 20 | 29.333333 |
| 50 | 73.333333 |
| 100 | 146.66667 |
| 1,000 | 1,466.6667 |
The units
- Mile/Hour (mph)
- Miles per hour: exactly 0.44704 m/s.
- Foot/Second (ft/s)
- 1 Foot/Second = 0.3048 Meter/Second.
Sources for these factors
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
- Handbook 44 (2024), Appendix C: General Tables of Units of Measurement — NIST
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy