** By equivalent performance, we mean another run with the same age graded percent. For a full list of the factors used, see our age-graded factors page. This has proved more reliable than using the 2006 age-grading factors found on Howard Grubb’s website as we used to do. His factors start at 5 kilometers, so for shorter races, we simply use the factor for 5 kilometers. You can download the files here (men’s) or here (women’s). * We’re using the 2015 road age-grading factors published by Alan Jones on. But you can still generate a prediction for those distances (or any other distance from 100 meters to 100 miles) using our race time predictor. Note: Several of the “softer” records - 2 mile, 10 mile, 25K, 30K, and 50 mile - have been removed from this tool’s calculations because they were skewing the results. To see a complete list, visit our world records page. (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. All distances 15 kilometers and longer are road times, not track times. We list the official World Athletics (formerly IAAF) world records wherever possible and filled in from other sources in the distances that the World Athletics doesn’t maintain records for. Our world records come from a few different sources. This can be very helpful for determining what pace you should aim for in your next race. 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. 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. Then, depending on your age, we multiply the resulting percentage by the appropriate WMA Factor.* The result is your age graded percent. 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. This tool combines both an age-graded calculator and a equivalent performances calculator into one.
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