Runner's Blueprint

✓ Quick AnswerThe 5K Time Predictor estimates your achievable 5K finish based on a known recent race or training pace. Drop in a number, get a realistic target. It uses the Riegel formula adapted with weekly mileage as a confidence weight — closer to what an actual coach would tell you than what a watch generates. How to use it

Plug in any ...

✓ Quick AnswerThe Marathon Predictor estimates your achievable marathon finish based on a recent shorter race result. It scales the prediction by weekly mileage because the gap between half-marathon fitness and marathon execution is mostly volume — and the predictor accounts for that. How to use it

Drop in any recent race result (10K, 15K, ...

✓ Quick AnswerThe Pace Calculator converts between time, distance, and pace in either direction. Drop in any two values, get the third. Built for runners planning splits, race-day pacing, or comparing training paces across different unit systems. How to use it

Pick the two values you know — for example, you ran a distance and want the pace,...

✓ Quick AnswerThe Marathon Pace Calculator converts a goal marathon time into a full pacing strategy — target pace, kilometer and mile splits, and a pacing band that accounts for tapering, weather, and effort drift in the second half. How to use it

Enter your goal marathon time. The tool produces target pace, splits for every kilometer and ...

✓ Quick AnswerThe Calorie Burn Calculator gives a realistic estimate of calories burned per run, factoring body weight, pace, and distance. Watch numbers are usually off by 10-30 percent — this calculation uses the standard metabolic-equivalent (MET) math that actually holds up. How to use it

Enter your body weight, the distance run, and th...