Last updated: September 16, 2026
Quick answer: Multiply m/s by 2.237 to get mph. 1 m/s = 2.237 mph. So 10 m/s = 22.4 mph, 30 m/s = 67.1 mph, and 100 m/s = 223.7 mph.
Meter/second to Mile/hour
Instantly convert meter/second to mile/hour with fast, accurate, real-time results.
Meters per second is the SI unit for speed in physics and engineering; miles per hour is the everyday unit on US roads and weather reports. Textbook problems give answers in m/s; weather apps and car speedometers display mph. Knowing how to switch between them is useful for both contexts. For the reverse, see the mph to m/s converter. For km/h conversions, see the km/h to mph converter.
Formula: m/s to mph
One mile equals 1,609.344 meters, and one hour equals 3,600 seconds, so:
The rounded factor 2.237 is accurate to four significant figures — good enough for any practical use. To go back from mph to m/s, divide by 2.237 (or multiply by 0.44704).
Quick reference
| m/s | mph | km/h |
|---|---|---|
| 1 m/s | 2.24 mph | 3.6 km/h |
| 5 m/s | 11.18 mph | 18 km/h |
| 10 m/s | 22.37 mph | 36 km/h |
| 20 m/s | 44.74 mph | 72 km/h |
| 30 m/s | 67.11 mph | 108 km/h |
| 44.7 m/s | 100 mph | 160.9 km/h |
| 100 m/s | 223.7 mph | 360 km/h |
Beaufort Wind Scale in m/s and mph
Meteorologists describe wind in m/s; US forecasts use mph. The Beaufort scale spans both:
| Beaufort | Description | m/s range | mph range | Effects |
|---|---|---|---|---|
| 0 | Calm | 0–0.2 | 0–0.4 | Smoke rises vertically |
| 1 | Light air | 0.3–1.5 | 0.7–3.4 | Wind direction shown by smoke |
| 2 | Light breeze | 1.6–3.3 | 3.6–7.4 | Wind felt on face; leaves rustle |
| 3 | Gentle breeze | 3.4–5.4 | 7.6–12.1 | Leaves and twigs in motion |
| 4 | Moderate breeze | 5.5–7.9 | 12.3–17.7 | Raises dust; small branches move |
| 5 | Fresh breeze | 8.0–10.7 | 17.9–23.9 | Small trees sway |
| 6 | Strong breeze | 10.8–13.8 | 24.2–30.9 | Large branches move; umbrellas hard to control |
| 7 | Near gale | 13.9–17.1 | 31.1–38.3 | Whole trees in motion; walking difficult |
| 8 | Gale | 17.2–20.7 | 38.5–46.3 | Twigs breaking off trees |
| 9 | Strong gale | 20.8–24.4 | 46.5–54.6 | Slight structural damage |
| 10 | Storm | 24.5–28.4 | 54.8–63.6 | Trees uprooted; considerable damage |
| 11 | Violent storm | 28.5–32.6 | 63.8–73.0 | Widespread damage |
| 12 | Hurricane force | ≥32.7 | ≥73.1 | Devastating damage |
Sports and Human Movement Speeds
| Activity / athlete | m/s | mph |
|---|---|---|
| Average walking pace | 1.4 m/s | 3.1 mph |
| Jogging (easy run) | 2.5–3.0 m/s | 5.6–6.7 mph |
| Recreational cyclist | 4–6 m/s | 9–13 mph |
| 100m sprint (average) | ~10 m/s | ~22.4 mph |
| Usain Bolt (WR, 100m) | 10.44 m/s avg | 23.35 mph avg |
| Usain Bolt (top speed) | 12.4 m/s | 27.8 mph |
| Elite marathon pace | 5.7 m/s | 12.7 mph |
| Baseball pitch (fastball) | 42–45 m/s | 94–100 mph |
| Tennis serve (pro) | 62–70 m/s | 138–156 mph |
| Soccer kick (hard) | 30–35 m/s | 67–78 mph |
Physics Reference Speeds
| Speed | m/s | mph |
|---|---|---|
| Speed of sound (sea level, 20°C) | 343 m/s | 767 mph |
| Muzzle velocity (rifle bullet) | 900–1,200 m/s | 2,013–2,684 mph |
| Concorde cruise speed | 603 m/s | 1,350 mph (Mach 2) |
| Space Shuttle reentry | 7,800 m/s | 17,500 mph |
| Earth orbital speed | 29,780 m/s | 66,600 mph |
| Speed of light (vacuum) | 299,792,458 m/s | 670,616,629 mph |
Full m/s to mph Table
| m/s | mph | m/s | mph | m/s | mph |
|---|---|---|---|---|---|
| 1 | 2.24 | 15 | 33.55 | 60 | 134.22 |
| 2 | 4.47 | 20 | 44.74 | 70 | 156.59 |
| 3 | 6.71 | 25 | 55.92 | 80 | 178.95 |
| 4 | 8.95 | 30 | 67.11 | 90 | 201.32 |
| 5 | 11.18 | 35 | 78.29 | 100 | 223.69 |
| 6 | 13.42 | 40 | 89.48 | 150 | 335.54 |
| 7 | 15.66 | 44.7 | 100.00 | 200 | 447.39 |
| 8 | 17.90 | 45 | 100.66 | 300 | 671.08 |
| 9 | 20.13 | 50 | 111.85 | 343 | 767.27 |
| 10 | 22.37 | 55 | 123.03 | 1,000 | 2,236.9 |
FAQs About m/s to mph
How do you convert m/s to mph?
Multiply by 2.237. For example, 15 m/s × 2.237 = 33.6 mph. The exact factor is 3,600 ÷ 1,609.344 = 2.23694.
What is 10 m/s in mph?
10 m/s × 2.237 = 22.37 mph. This is roughly the average speed of a 100m sprint — fast running pace, not world record.
What is 30 m/s in mph?
30 m/s × 2.237 = 67.1 mph. This is about the speed of a fast highway car, or a Category 1 hurricane threshold (74 mph = 33.1 m/s).
Is m/s faster than mph?
A speed of 1 m/s is slower than 1 mph — 1 m/s ≈ 2.24 mph. But when comparing the same speed in both units, a larger m/s number beats a smaller mph number if the m/s figure × 2.237 exceeds the mph figure.
What is the speed of sound in mph?
At sea level and 20°C, the speed of sound is 343 m/s = 767 mph (Mach 1). At the cruising altitude of most jets (~35,000 ft, −56°C), it drops to about 295 m/s = 660 mph.
Sources
References & further reading
- Bureau International des Poids et Mesures (BIPM) — SI unit for speed: meter per second (m·s⁻¹)
- World Meteorological Organization — Guide to Meteorological Instruments — Beaufort scale definitions
- World Athletics — Usain Bolt 100m world record analysis (Berlin 2009): average 10.44 m/s, peak 12.4 m/s
- NIST — Speed of sound in dry air: 331.3 + 0.606 × T°C m/s
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