Miles per Hour to Meters per Second

Convert mph to m/s instantly — with a table, common speeds, and a live calculator.

1 mph equals 0.447 m/s.

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Convert any speed

Result (m/s)0.447 m/s

mph to m/s table

mphm/s
1 mph0.447 m/s
2 mph0.894 m/s
3 mph1.34 m/s
5 mph2.24 m/s
10 mph4.47 m/s
15 mph6.71 m/s
20 mph8.94 m/s
25 mph11.18 m/s
30 mph13.41 m/s
40 mph17.88 m/s
50 mph22.35 m/s
55 mph24.59 m/s
60 mph26.82 m/s
65 mph29.06 m/s
70 mph31.29 m/s
80 mph35.76 m/s
90 mph40.23 m/s
100 mph44.7 m/s
120 mph53.64 m/s
150 mph67.06 m/s
200 mph89.41 m/s
300 mph134.11 m/s

m/s to mph (reverse)

m/smph
1 m/s2.24 mph
2 m/s4.47 mph
3 m/s6.71 mph
5 m/s11.18 mph
10 m/s22.37 mph
15 m/s33.55 mph
20 m/s44.74 mph
25 m/s55.92 mph
30 m/s67.11 mph
40 m/s89.48 mph
50 m/s111.85 mph
55 m/s123.03 mph
60 m/s134.22 mph
65 m/s145.4 mph
70 m/s156.59 mph
80 m/s178.95 mph
90 m/s201.32 mph
100 m/s223.69 mph
120 m/s268.43 mph
150 m/s335.54 mph
200 m/s447.39 mph
300 m/s671.08 mph

Common speeds

mphm/s
5 mph2.24 m/s
10 mph4.47 m/s
20 mph8.94 m/s
30 mph13.41 m/s
40 mph17.88 m/s
50 mph22.35 m/s
60 mph26.82 m/s
70 mph31.29 m/s
80 mph35.76 m/s
100 mph44.7 m/s
120 mph53.64 m/s
200 mph89.41 m/s

How it scales

112234450255075100mph

100 km/h in other units

62.1mph27.8m/s54kn91.1ft/s

The ratio at a glance

1 mph0.45 m/s

Metric, imperial, and nautical speed units

Kilometers per hour and meters per second are metric, miles per hour and feet per second belong to the imperial/US system, and knots (one nautical mile per hour) come from maritime and aviation use. One mile per hour is defined as exactly 0.44704 meters per second, and one knot as exactly 1.852 km/h.

Speed conversions are exact and rest on fixed factors — for more unit pairs, use our speed conversion hub.

Related conversions

Where speed conversions are used

Speed conversions are part of driving abroad, aviation and sailing, and sport — moving between km/h, mph, knots, and metres per second.

  • One knot is one nautical mile per hour, equal to about 1.852 km/h.
  • A quick mental trick: mph ≈ km/h × 0.62, and km/h ≈ mph × 1.61.
  • The speed of sound at sea level is about 1,235 km/h (Mach 1); the speed of light is roughly 1.08 billion km/h.

Frequently asked questions

How many m/s are in 1 mph?

1 mph equals 0.447 m/s.

How many m/s are in 2 mph?

2 mph equal 0.894 m/s.

How do I convert mph to m/s?

Divide the speed in mph by 2.24 to get m/s.

What is a meter per second?

Meters per second (m/s) is the SI unit of speed. 1 m/s equals exactly 3.6 km/h and about 2.23694 mph.

Why are there so many speed units?

Kilometers per hour and meters per second are metric, miles per hour and feet per second belong to the imperial/US system, and knots come from maritime and aviation use. All conversions rest on fixed factors.

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