Speed Converter
Speed measures how fast distance is covered over time. Road speeds use miles per hour or kilometers per hour, physics uses meters per second, and marine and aviation use knots. The SI base is the meter per second. Aeronautics adds Mach, and astronomy adds the speed of light and orbital velocities.
36 units supported Base unit meter per second (m/s)
Multiply the number of miles per hour by 1.609344 to get kilometers per hour. How this is calculated
About speed conversion
Speed conversion is commonly needed when driving, running, cycling, aviation, and weather reports.
Popular conversions
Convert Mile per Hour to other speed units
1 mph expressed in every other speed unit on this site.
- Meter per Second m/s 0.44704
- Kilometer per Hour km/h 1.609344
- Kilometer per Minute km/min 0.0268224
- Kilometer per Second km/s 0.00044704
- Meter per Minute m/min 26.8224
- Meter per Hour m/h 1,609.344
- Centimeter per Second cm/s 44.704
- Centimeter per Minute cm/min 2,682.24
- Centimeter per Hour cm/h 160,934.4
- Millimeter per Second mm/s 447.04
- Millimeter per Minute mm/min 26,822.4
- Millimeter per Hour mm/h 1,609,344
- Mile per Hour mph 1
- Mile per Minute mi/min 0.016666667
- Mile per Second mi/s 0.00027777778
- Yard per Hour yd/h 1,760
- Yard per Minute yd/min 29.333333
- Yard per Second yd/s 0.48888889
- Foot per Hour ft/h 5,280
- Foot per Minute ft/min 88
- Foot per Second ft/s 1.4666667
- Inch per Second in/s 17.6
- Inch per Minute in/min 1,056
- Inch per Hour in/h 63,360
- Knot kn 0.86897624
- Knot (UK) kn (UK) 0.86842105
- Mach (sea level) M 0.001313703
- Mach (SI standard) M (SI) 0.0015151515
- Mach (20 °C, 1 atm) M (20 °C) 0.0013010477
- Speed of Sound (pure water) c (H₂O) 0.00030150401
- Speed of Sound (sea water) c (sea) 0.000293796
- Speed of Light (vacuum) c 1.4911649e-9
- Cosmic Velocity (first) v₁ 0.000056587342
- Cosmic Velocity (second) v₂ 0.000039914286
- Cosmic Velocity (third) v₃ 0.000026817037
- Earth's Orbital Velocity v⊕ 0.000015018982
Complete list of speed units
All 36 units this converter supports, each stated against the meter per second (m/s).
| Unit | Symbol | System | In meters per second | Conversions |
|---|---|---|---|---|
| Meter per Second | m/s | SI | base unit (m/s) | m/s to km/hm/s to mph |
| Kilometer per Hour | km/h | Metric | 1 km/h = 0.277777777778 m/s | km/h to mphkm/h to m/s |
| Kilometer per Minute | km/min | Metric | 1 km/min = 16.6666666667 m/s | — |
| Kilometer per Second | km/s | Metric | 1 km/s = 1,000 m/s | — |
| Meter per Minute | m/min | Metric | 1 m/min = 0.0166666666667 m/s | — |
| Meter per Hour | m/h | Metric | 1 m/h = 0.000277777777778 m/s | — |
| Centimeter per Second | cm/s | Metric | 1 cm/s = 0.01 m/s | — |
| Centimeter per Minute | cm/min | Metric | 1 cm/min = 0.000166666666667 m/s | — |
| Centimeter per Hour | cm/h | Metric | 1 cm/h = 0.00000277777777778 m/s | — |
| Millimeter per Second | mm/s | Metric | 1 mm/s = 0.001 m/s | — |
| Millimeter per Minute | mm/min | Metric | 1 mm/min = 0.0000166666666667 m/s | — |
| Millimeter per Hour | mm/h | Metric | 1 mm/h = 2.77777777778e-7 m/s | — |
| Mile per Hour | mph | Imperial | 1 mph = 0.44704 m/s | mph to km/hmph to knots |
| Mile per Minute | mi/min | Imperial | 1 mi/min = 26.8224 m/s | — |
| Mile per Second | mi/s | Imperial | 1 mi/s = 1,609.344 m/s | — |
| Yard per Hour | yd/h | Imperial | 1 yd/h = 0.000254 m/s | — |
| Yard per Minute | yd/min | Imperial | 1 yd/min = 0.01524 m/s | — |
| Yard per Second | yd/s | Imperial | 1 yd/s = 0.9144 m/s | — |
| Foot per Hour | ft/h | Imperial | 1 ft/h = 0.0000846666666667 m/s | — |
| Foot per Minute | ft/min | Imperial | 1 ft/min = 0.00508 m/s | — |
| Foot per Second | ft/s | Imperial | 1 ft/s = 0.3048 m/s | fps to mph |
| Inch per Second | in/s | Imperial | 1 in/s = 0.0254 m/s | — |
| Inch per Minute | in/min | Imperial | 1 in/min = 0.000423333333333 m/s | — |
| Inch per Hour | in/h | Imperial | 1 in/h = 0.00000705555555556 m/s | — |
| Knot | kn | Other | 1 kn = 0.514444444444 m/s | knots to mphknots to km/h |
| Knot (UK) | kn (UK) | Imperial | 1 kn (UK) = 0.514773333333 m/s | — |
| Mach (sea level) | M | Other | 1 M = 340.29 m/s | mach to mph |
| Mach (SI standard) | M (SI) | Other | 1 M (SI) = 295.0464 m/s | — |
| Mach (20 °C, 1 atm) | M (20 °C) | Other | 1 M (20 °C) = 343.6 m/s | — |
| Speed of Sound (pure water) | c (H₂O) | Other | 1 c (H₂O) = 1,482.7 m/s | — |
| Speed of Sound (sea water) | c (sea) | Other | 1 c (sea) = 1,521.6 m/s | — |
| Speed of Light (vacuum) | c | Other | 1 c = 299,792,458 m/s | — |
| Cosmic Velocity (first) | v₁ | Other | 1 v₁ = 7,900 m/s | — |
| Cosmic Velocity (second) | v₂ | Other | 1 v₂ = 11,200 m/s | — |
| Cosmic Velocity (third) | v₃ | Other | 1 v₃ = 16,670 m/s | — |
| Earth's Orbital Velocity | v⊕ | Other | 1 v⊕ = 29,765 m/s | — |
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Frequently asked questions
What is the base unit for speed?
Speed conversions on this site are calculated against the meter per second (m/s).
Which speed units can I convert?
You can convert between 36 units, including meter per second, kilometer per hour, kilometer per minute, kilometer per second, and more.
Where is speed conversion useful?
It is commonly needed when driving, running, cycling, aviation, and weather reports.
Does this converter mix measurement systems?
The converter supports SI, Metric, Imperial, Other units and keeps their exact definitions separate so results stay accurate.
Related categories
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.