Age-Graded Calculator with Equivalent Performances

You can find your age-graded percent and a list of equivalent performances at other distances here. Just enter a few details about your race below and we’ll do the rest.


How does it work?

This tool combines both an age-graded calculator and a equivalent performances calculator into one. To calculate your age graded percent (often abbreviated AGP or AG%), we take your time and divide it by the world record time at that distance. Then, depending on your age, we multiply the resulting percentage by the appropriate WMA Factor.* The result is your age graded percent.

Then, we take that AG% and use it to calculate what an equivalent performance** would be at each of our standard race distances, and return them to you in a table. So, for example, you can plug in your most recent 10K time and get an estimate of how fast you should be able to finish a half marathon. This can be very helpful for determining what pace you should aim for in your next race.

Our world records come from a few different sources. We list the official IAAF world records wherever possible and filled in from other sources in the distances that the IAAF doesn’t maintain records for. All distances 15 kilometers and longer are road times, not track times. (For example, we list the road 20K record, not the 20,000 meter track record.) For all races 10,000 meters and shorter, we list track records. To see a complete list, visit our world records page.

* For races 5 kilometers and longer, we are using the 2015 road age-grading factors published by Alan Jones on You can download the files here (men’s) or here (women’s). For everything shorter than 5 kilometers, we are using the 2006 age-grading factors found on Howard Grubb’s website. You can download them directly here. For a full list of the factors used, see our age-graded factors page.

** By equivalent performance, we mean another run with the same age graded percent. Of course, training for a 100 meter dash is ridiculously different from training for a 100 mile race, so just because the calculator gives you an equivalent time doesn’t mean you’ll automatically be able to run it. You still have to train appropriately. And, even so, your body might be better suited to run either short races or long ones so you might not be able to get to the same AG% for all distances.