Sprint Split Speed Calculator
Sprint speed is best measured over a flying segment between two timing gates rather than from a standing start, because the acceleration phase masks true top speed. This calculator takes the distance and elapsed time at an earlier marker and at a later marker, finds the segment distance and segment time, and computes the average speed across that segment. It reports the result in metres per second, kilometres per hour, and miles per hour, so you can compare it against past tests or published benchmarks. Enter consistent units: distances in metres and times in seconds, both measured from the same start of the run.
Segment speed formula
segment distance (m) = second distance - first distance
segment time (s) = second time - first time
speed (m/s) = segment distance / segment time
km/h = m/s * 3.6; mph = m/s * 2.2369362921
Worked example: markers at 10 m (1.9 s) and 40 m (5.0 s) give segment distance 30 m and segment time 3.1 s, so speed = 30 / 3.1 = 9.68 m/s, that is 34.84 km/h or 21.65 mph.
Sprint testing notes
- Use a flying segment between two later markers to capture near-maximal speed.
- Both marker times must be measured from the same run start.
- Keep distances in metres and times in seconds for consistent results.
- The result is an average over the segment, not the instantaneous peak.
- Compare against your own previous tests to track speed development.
Sprint split speed: frequently asked questions
What is a sprint split?
A split is the time recorded as an athlete passes a marker partway through a sprint, for example at 10 metres and 30 metres. The flying speed over a segment is the distance between two markers divided by the time taken to cover that segment, which removes the slow start phase and shows true running speed.
How do I calculate segment speed?
Subtract the earlier split time from the later split time to get the segment time, and subtract the earlier distance from the later distance to get the segment distance. Segment speed equals segment distance divided by segment time. The calculator converts the result to metres per second, kilometres per hour, and miles per hour.
Why measure a flying segment rather than the whole sprint?
Average speed over a whole sprint from a standing start is reduced by the acceleration phase. A flying segment between two later markers captures near-maximal velocity, which is the figure coaches usually want for top-speed assessment.
How do I convert m/s to mph?
Multiply metres per second by 3.6 for kilometres per hour, or by 2.2369362921 for miles per hour. For example 10 m/s is 36 km/h or about 22.37 mph. The calculator performs these conversions automatically.
What is a fast 10 metre flying speed?
Elite male sprinters can exceed 11 to 12 metres per second over a flying segment near top speed, while recreational athletes are typically much lower. This calculator reports your measured speed; compare it against your own past tests to track progress.
Official sources
- National Institute of Standards and Technology: SI units and unit conversions.
- National Center for Biotechnology Information (PubMed): Sprint kinematics and speed testing literature.
Reviewed by the CalculatorHub team, edited by James Graham, 17 June 2026. See our methodology.