Hi ,
It looks like you're using an ad blocker.



The revenue generated from the adverts on the site is a critical part of our funding - and it's because of these ads that I can offer the site for free. But using the site for free AND blocking the ads doesn't feel like a great thing to do, which is why this box is so large and inconvenient. Some sites will completely block your access, but I'm not doing that - I'm appealing to your good nature instead. Did you know that you can allow ads for specific sites, whilst still blocking them on others?

Thanks,
Ian Williams aka Fetch
Want help calculating training paces, race predictions and age gradings? More calculators here

Training Calculator - Predict Your Marathon Time

In 1977, Pete Riegel devised a formula for predicting race times, based on your existing performances. The basic formula is t2 = t1 * (d2 / d1)1.06, but the "1.06" can be improved upon.

Specifically, when converting from half marathon to full marathon, it often provides what feels like an unobtainable time. From an analysis of over a thousand runners, we found that it was more than 5% out for two thirds of runners. We have produced a calculator that will give you a more realistic calculation - and it takes your gender into account. In our sample data, it got within 5% for three quarters of our sample.

If you like our calculator, please share it with your friends:
Enter your half marathon time here:

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Fetcheveryone is a free website for runners, cyclists, and swimmers. We offer a training log with detailed analysis, none of it hidden behind a paywall - we are funded by voluntary donations from happy users. Find races and runners near you, get advice, play games, share blogs, measure routes - and much more!

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