Percentage calculator
Calculate percentages online, including percent of a number, percentage increase, and percentage decrease.
Pace calculator
Calculate running pace, finish time, or distance in km or miles. Get race predictions for 5K, 10K, half marathon, and marathon plus splits.
How to use Pace calculator
A running pace calculator that solves for whichever value you're missing:
- Pace from distance and finish time
- Finish time from distance and pace
- Distance from time and pace
Choose 5K, 10K, half marathon, or marathon presets, or enter any distance in kilometers or miles. You also get speed, pace in the other unit, predicted times at standard race distances, and per-unit splits.
Pace calculator FAQs
Is Pace calculator free?
Pace calculator is a free online tool on ReallyUseful.Tools. No account is required.
Does Pace calculator run in my browser?
Pace calculator is designed to run in your browser where supported, so files can stay on your device instead of being uploaded to a server.
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