Running pace
Solve pace, time or distance and generate splits at a constant speed. Drag the graph handles to change inputs and explore the result.
Your inputs
The editable example is illustrative. Enter your own dimensions, operating data, prices, and fees. Results update as you edit.
Calculations run in your browser. Inputs are not saved or sent to analytics.
How it works
- = × ; Speed = /; : tₙ = min(tᵣ, tᵢ)
- Worked example: 10 km /50 min = 12 km/h; 50 min/10 km = 5 min/km; 5 km × 5 min/km = 25 min
- Supported input limits: : 1e-12 ≤ x ≤ 1,000,000,000,000; : n ≤ 14; : n ≤ 14; : 0 ≤ x ≤ 1,000,000,000,000
Input and formula key
Your result
Complete the inputs to see your result.
Assumptions and limitations
Enter time and pace as HH:MM:SS; pace uses your selected distance unit. Splits assume one constant speed, with the final segment shortened when necessary. Projected times do not account for fatigue, hills, weather or training fitness.
Sources
- NIST — conversion factor conventions Sources reviewed: 2026-10-06
- NIST — conversion factor table B.8 Sources reviewed: 2026-10-06
