Convert feet per second to miles per hour
Instant, accurate ft/s → mph conversion with a live converter, table and formula.
1 feet per second = 0.681818 miles per hour
1 miles per hour = 1.46667 feet per second
feet per second to miles per hour table
| feet per second (ft/s) | miles per hour (mph) |
|---|---|
| 0.5 | 0.340909 |
| 1 | 0.681818 |
| 2 | 1.36364 |
| 5 | 3.40909 |
| 10 | 6.81818 |
| 20 | 13.6364 |
| 50 | 34.0909 |
| 100 | 68.1818 |
| 500 | 340.909 |
| 1000 | 681.818 |
Formula
miles per hour = feet per second × 0.681818.
Example
10 feet per second = 6.81818 miles per hour.
What is a feet per second?
Feet per second (ft/s) measures speed in imperial units.
What is a miles per hour?
Miles per hour (mph) is the imperial speed unit used in the US and UK.
Real-world reference points
Walking is ~5 km/h (3 mph); city driving ~50 km/h (31 mph); a jet cruises near 900 km/h (560 mph).
| Reference | feet per second | miles per hour |
|---|---|---|
| Brisk walk | 4.92 ft/s | 3.36 mph |
| Sprinting world record (avg) | 34.25 ft/s | 23.35 mph |
| City speed limit (50 km/h) | 45.57 ft/s | 31.07 mph |
| Highway cruising (100 km/h) | 91.14 ft/s | 62.14 mph |
| Commercial jet cruise | 820 ft/s | 559 mph |
Mistakes to avoid with speed conversions
- Dividing instead of multiplying by 3.6 when moving between m/s and km/h.
- Assuming knots equal mph — a knot is ~15% faster (nautical miles per hour).
- Comparing GPS speed (ground speed) with a car's speedometer, which reads slightly high by design.
Frequently asked questions
How many miles per hour in a feet per second?+
1 feet per second = 0.681818 miles per hour.
How do I convert feet per second to miles per hour?+
Enter the value in the feet per second box above and the miles per hour value appears instantly. You can also type in the miles per hour box to convert the other way.
Is this ft/s to mph converter free?+
Yes — it is 100% free, needs no sign-up, and runs entirely in your browser.