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Speed and Running Pace Unit Converter

Convert positive speeds into metric, customary and nautical rates or running pace formats.

  • Formula & worked example
  • Private in your browser
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

10 m/s equals 36 km/h and takes 10 seconds per 100 m. Its speed in feet per second is approximately 32.808399.

Speed = distance/time; pace = time/distance; 1 mph = 0.44704 m/s.

Worked example

Enter these known values and leave the other values blank.

Meters per second
10 m/s
Miles per hour
22.37 mph
Feet per second
32.81 ft/s
Yards per second
10.936 yd/s
More imperial/US units
0.006214 mi/s
Kilometers per hour
36 km/h
Kilometers per second
0.01 km/s
More metric units
1000 cm/s
Knots
19.44 kn
Beaufort scale
5.23 B
Light speed
3.3356e-8 c
Minutes per mile and seconds per mile
2:40.93 min:sec/mile
Seconds per mile
160.93 sec/mile
Minutes per km and seconds per km
1:40 min:sec/km
Seconds per 100 m
10 sec/100m
More pace units
0.0016667 min/m

Assumptions and limitations

  • Speed and pace must be positive. Pace is reciprocal to speed; minutes:seconds controls accept duration components. The row labeled seconds per 100 m is a pace, not seconds per 100 km.
  • The Beaufort equivalent is the continuous approximation v = 0.836 B^(3/2), not a categorical wind observation or a forecast. The c selector uses exactly 299792458 m/s.
  • Clear the value you want to solve before entering the remaining independent measurements. Display rounding does not describe measurement uncertainty.

Common questions

How should I enter an unknown quantity?

Leave the unknown field empty. Supply enough independent values; lock a known value if you need to preserve it while changing another control.

References

Replace rounded captured unit factors with exact definitions or explicitly identified CODATA 2022 central values; preserve all choices and original captures. Enforce the stated arithmetic and physical domains.

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