🏅 Running Pace Calculator
Calculate pace, race time, or distance — for any run, any distance.
Our free Pace Calculator works in all three directions: given distance and time → pace per mile/km; given pace and distance → finish time; given pace and time → distance covered. Essential for runners, cyclists, and race planners training for any distance.
Pace Formulas
Finish Time = Pace × Distance
Distance = Total Time ÷ Pace
Common Race Distances Reference
5K (3.107 miles): World record 12:49 | Competitive amateur 20–25 min | Casual 30–40 min
10K (6.214 miles): World record 26:24 | Good amateur 40–50 min | Recreational 55–65 min
Half Marathon (13.1 miles): World record 57:31 | Average finisher 2:00–2:20
Marathon (26.2 miles): World record 2:00:35 | Average finisher 4:20–5:00
Training Zone Paces
Effective running training uses different intensity zones. Most of your weekly mileage (80%) should be at easy/conversational pace:
- Easy/Recovery runs: 60–90 seconds per mile SLOWER than 5K race pace. You should be able to hold a full conversation.
- Tempo runs: Approximately 30 seconds per mile slower than 5K pace. "Comfortably hard" — sustainable for 20–40 minutes.
- Interval training: At or faster than 5K pace, with recovery periods between efforts.
- Long run: 60–90 seconds per mile slower than marathon goal pace.
Pacing Strategy for Race Day
Negative splitting — running the second half faster than the first — is the most efficient race strategy. Even a 1–2% negative split typically results in a personal best. Most recreational runners go out too fast and fade badly in the second half.
Recommended race day approach: start 10–15 seconds per mile slower than goal pace for the first mile. You'll feel restrained but you're building reserves. The payoff comes in the final miles when others are fading and you're still running strong.
Altitude Effect on Pace
Reduced oxygen at altitude slows running pace. As a guideline:
- 5,000 ft (1,500m): approximately 2–3% slower
- 8,200 ft (2,500m): approximately 4–6% slower
- 10,000 ft (3,000m): approximately 6–8% slower
Acclimatization takes 10–14 days for full adaptation at altitude. Short visits see the full performance penalty without any adaptation benefit.
🏃 Calculate your race pace and finish time with our free Pace Calculator.
Open Pace Calculator →Frequently Asked Questions
What is a good running pace for beginners?
For beginner runners, pace matters less than effort. Run at a conversational pace — if you can't speak in complete sentences, slow down. Most beginners find this is around 11–14 minutes per mile. Over weeks and months, your comfortable pace will naturally improve as your aerobic fitness develops.
How do I convert min/km to min/mile?
Multiply your min/km pace by 1.60934 to get min/mile. So a 5:00/km pace = 5:00 × 1.609 = 8:03/mile. Going the other direction, multiply min/mile by 0.62137. Our calculator handles this conversion automatically.
What is a good marathon pace for a 4-hour finish?
A 4-hour marathon requires a pace of approximately 9:09 per mile (5:41 per km). For training purposes, your easy runs should be around 10:30–11:00 per mile. Your long runs at 10:00–10:30 per mile. Your tempo runs at 8:30–8:45 per mile.