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Over the years there have been a few methods for calculating esimated race finish times for distances never run before. This calculator shows the results of formulas by Peter Riegel and Dave Cameron.

Enter either a previous finish time or an average pace and the results will calculate the estimated finish times of other distances.

1Select if you are working in metric (kilometers) or imperial (miles) units

Metric

Imperial

2Select if using a race finish time or average pace

Finish Time

Average Pace

3Enter the finish time or average pace

4Select the distance this time or pace corresponds to

100m

200m

400m

800m

1500m

1 Mile

2 Miles

5k

5 Miles

10k

10 Miles

Half Marathon

Marathon

Custom

KM

5See the estimated race times for common race distances below based on your input values of running 0 in 0

Time

Pace

Distance

Riegel

Cameron

100 Metres

00:00:00

00:00:00

200 Metres

00:00:00

00:00:00

400 Metres

00:00:00

00:00:00

800 Metres

00:00:00

00:00:00

1500 Metres

00:00:00

00:00:00

1 Mile

00:00:00

00:00:00

2 Miles

00:00:00

00:00:00

5k

00:00:00

00:00:00

5 Miles

00:00:00

00:00:00

10k

00:00:00

00:00:00

10 Miles

00:00:00

00:00:00

Half Marathon

00:00:00

00:00:00

Marathon

00:00:00

00:00:00

50k

00:00:00

00:00:00

50 Miles

00:00:00

00:00:00

The results from all formulas tends to fall away towards the extremes so the very short or very long races may be somewhat unreliable however the 5k to marathon range tends to be fairly well accepted as a good guide.

Alternatives

Another way to predict a race time is to use the age grade calculator which, when including age, will use age grading tables to calculate an age grade score, then use this to predict equivalent age graded times for other distances.

Calculations here are based on

- Peter Riegel's formula of T1*(D2/D1)^1.06
- Dave Cameron's formula