Running Pace Calculator

PaceCalc solves for pace, time, or distance the moment you fill in the other two values, in both metric and imperial units. Enter a target finish time for a five kilometer, ten kilometer, half marathon, or full marathon and get the exact pace per kilometer and per mile you need to hold.

Key features
• Three-way solver for pace, finish time, or distance
• Race presets for 5K, 10K, half marathon, and marathon
• Split table with optional negative-split pacing
• Equivalent performance predictions across race distances
• Treadmill speed conversion from any pace
• Saved plans with notes and shareable summaries

Use a known race result to estimate finish times at other distances with the Riegel formula, save named training plans, and share a clean pace summary when you need a quick checkpoint list.