Yashoda Half Marathon 4.0
Ghaziabad · Half marathon, 10K, 5K
Train
Free tool · running
Running pace calculator and race time predictor
Quick answer: pace = time ÷ distance. A 2-hour half marathon needs 5:41 per km, and so does a 4-hour marathon. Find your pace, your finish time or your likely race times from a recent run.
- 5K to full marathon
- Pace in min per km
- Reviewed 9 November 2026
How pace and race predictions are worked out
pace (min per km) = time ÷ distancespeed (km/h) = 60 ÷ pace in minutesExample: 10K in 1:00:00 is 6:00 per km, or 10 km/h. Paces are rounded down to the second, so running at the pace shown gets you in on time.
Race predictions use the Riegel formula, the standard used by most running calculators:
predicted time = your time × (race distance ÷ your distance)1.06It works best when you have trained for the longer distance and use a recent, hard effort. Predicting a marathon from a 5K or 10K is often optimistic, especially for a first marathon.
Pace chart for common goal times
| Race | Goal time | Pace needed | Speed |
|---|---|---|---|
| 5K | 25:00 | 5:00 /km | 12 km/h |
| 5K | 30:00 | 6:00 /km | 10 km/h |
| 5K | 35:00 | 7:00 /km | 8.6 km/h |
| 5K | 40:00 | 8:00 /km | 7.5 km/h |
| 10K | 50:00 | 5:00 /km | 12 km/h |
| 10K | 1:00:00 | 6:00 /km | 10 km/h |
| 10K | 1:10:00 | 7:00 /km | 8.6 km/h |
| 10K | 1:20:00 | 8:00 /km | 7.5 km/h |
| Half marathon | 1:45:00 | 4:58 /km | 12.1 km/h |
| Half marathon | 2:00:00 | 5:41 /km | 10.5 km/h |
| Half marathon | 2:15:00 | 6:23 /km | 9.4 km/h |
| Half marathon | 2:30:00 | 7:06 /km | 8.4 km/h |
| Full marathon | 3:30:00 | 4:58 /km | 12.1 km/h |
| Full marathon | 4:00:00 | 5:41 /km | 10.5 km/h |
| Full marathon | 4:30:00 | 6:23 /km | 9.4 km/h |
| Full marathon | 5:00:00 | 7:06 /km | 8.4 km/h |
Upcoming races in India
Got a race coming up? Work out your goal pace above, then train for it with a plan counted back from race day.
Adani Ahmedabad Marathon
Ahmedabad · Full marathon, Half marathon, 10K, 5K
Train
JBG Kolkata Marathon
Kolkata · Full marathon, Half marathon, 10K, 5K
Train
TCS Noida 10K
Noida · 10K, 5K
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Bengaluru Midnight Marathon
Bengaluru · Full marathon, Half marathon, 10K, 5K, Other distances
Train
Pune International Marathon
Pune · Full marathon, Half marathon, 10K, 5K
TrainQuestions people ask
What pace do I need for a sub-2-hour half marathon?
5:41 per km (10.5 km/h) or faster. Running exactly 5:41 per km finishes 21.1 km in about 1:59:54.
What pace do I need for a 4-hour marathon?
5:41 per km, the same pace as a 2-hour half marathon, held for twice as long. A 5-hour marathon needs 7:06 per km.
How do I calculate my running pace?
Divide your time by your distance. For example, 10K in 55 minutes is 55 ÷ 10 = 5.5 minutes, which is 5:30 per km.
How do I convert km/h to pace per km?
Divide 60 by your speed. 10 km/h is 60 ÷ 10 = 6:00 per km; 12 km/h is 5:00 per km. Handy on a treadmill.
How accurate are race time predictions?
They are a good guide if you have trained for the longer distance. The Riegel formula is reliable from short races up to about the half marathon. For a marathon, especially your first, most runners finish slower than a 5K or 10K suggests.
What are split times?
Split times are where you should be at each km (or every 5 km in a marathon) to finish on target. Running even splits, the same pace throughout, is the simplest way to avoid slowing down at the end.
Sources
- Riegel P.S., Athletic records and human endurance, American Scientist, 1981: the race time prediction formula (exponent 1.06).
- Distances: half marathon 21.0975 km, marathon 42.195 km (World Athletics).
Made by the Fittest Club team. Reviewed 9 November 2026. If you are new to running or returning after a long break, build up slowly and check with your doctor if you have a health condition.
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