Sprint Reaction Time Calculator

Analyze sprint reaction time, wind correction, split phases, and speed endurance for 60m-400m races.

Race distance (m)

Reaction time (s)

Finish time (s)

60m split (s)

Wind speed (m/s)

Tab to move between fields

Running Time (no reaction)

10.35 s

Wind-Corrected Time10.5 s

Equivalent Flat Time10.5 s

Average Speed9.66 m/s

Est. Max Speed10.43 m/s

Speed Endurance95.7%

Drive Phase (0-30m)3.11 s

Transition (30-60m)2.59 s

Max Velocity (60-80m)2.28 s

Deceleration (80-100m)2.38 s

Est. Time to 10 m1.79 s

Wind Correction0 s

Is Wind LegalYes

Reaction QualityGood

How to Use This Calculator

Enter Race distance (m), Reaction time (s), and Finish time (s).
Set 60m split (s) and Wind speed (m/s).
Review the Running Time (no reaction) (s) result.
Use Wind-Corrected Time (s) and Equivalent Flat Time (s) to inform your decision.

How the result changes with Finish time (s)

Race distance (m): Race distance in meters (60, 100, 200, or 400).
Reaction time (s): Time from gun to first movement (IAAF false start < 0.100 s).
Finish time (s): Official finish time in seconds.
60m split (s): Time at 60m mark (0 = estimate from finish time).
Wind speed (m/s): Wind speed in m/s (positive = tailwind, negative = headwind).

Running Time (no reaction): Finish time minus reaction time — pure running speed.
Wind-Corrected Time: Time adjusted for wind conditions.
Equivalent Flat Time: Normalized to 0.150 s reaction and zero wind.
Average Speed: Average running speed over the race distance.
Est. Max Speed: Estimated peak velocity during the race.
Speed Endurance: Speed maintenance in final segment vs peak speed phase.
Drive Phase (0-30m): Time for initial acceleration phase.
Transition (30-60m): Time for transition to upright running.
Max Velocity (60-80m): Time in peak speed zone.
Deceleration (80-100m): Time in speed maintenance phase.
Est. Time to 10 m: Estimated time to cover first 10 metres from blocks.
Wind Correction: Time added/subtracted for wind correction.

Identify Input Parameters
4 parameters
Race distance (m) = 100, Reaction time (s) = 0.15, Finish time (s) = 10.5, 60m split (s) = 0 = 5 input(s) provided
Calculate Running Time
Running Time = finishTime - reactionTime
10.35 = 10.35
Calculate Wind-Corrected Time
Wind-Corrected Time = finishTime + windCorrectionFactor * windSpeed
10.5 = 10.5
Calculate Equivalent Flat Time
Equivalent Flat Time = windCorrectedTime - reactionTime + normalizedReaction
10.5 = 10.5