Age Grading Calculator
Compare a race time fairly across ages with an estimated age-graded percentage.
Quick answer: enter your details below and click Calculate Age Grade — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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How to use
- Enter your age and pick your sex and distance.
- Enter your finish time in minutes.
- Click Calculate Age Grade.
About this tool
Enter your age, sex, race distance, and finish time. The tool estimates an age-graded percentage by adjusting a reference standard time with a simple age factor, and shows the equivalent open-age time. This is an estimate using a simplified age curve, not the official World Masters Athletics tables.
Frequently asked questions
Is this the official age grade?
No. Official tables use detailed age-group standards; this is a simplified estimate for casual comparison.
What is a good age grade?
Roughly, 60% is strong for a club runner and 80% plus is national-class territory, but the labels vary by source.