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Running Pace Calculator
Work out your pace from a run, or see projected race times for any target pace.
Calculate pace from distance & time
Project race times from a pace
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How to Use This Calculator
Use the top form to find your pace from a recent run. Use the bottom form to see what finish times a target pace predicts.
- For race day, add a buffer — most runners slow 5-10% over half/full marathons.
- Negative splits (starting slower) usually produce better overall times.
Frequently Asked Questions
What is a good running pace?
For a recreational runner, 5:30-7:00 per km (9-11 min per mile) is typical. "Good" depends on your training history.
How do I pace a half marathon?
Start 10-15 seconds per km slower than target for the first 3 km, then settle into goal pace.
Does elevation affect pace?
Significantly — expect 20-30 sec/km slower on hilly courses than flat roads.
Can I trust race-time projections?
They're a guide for equal effort. Actual times depend on training, course and conditions.
Practical Example
Suppose you run 10 km in 52 minutes:
- Pace = 52 ÷ 10 = 5:12 per km (≈ 8:22 per mile)
- Projected 5 km (equal effort) ≈ 25:40
- Projected half marathon ≈ 1:49–1:52
What Your Results Mean
- Pace — minutes per km or mile at your effort level.
- Speed — the inverse; distance covered per hour.
- Race projections — estimates assuming even pacing and similar conditions.
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