Use a published running factor
Enter your actual time, the age factor for your event and category, and the matching open standard from the same table edition. All times are in seconds: 25 minutes is 1,500 seconds. The factor and standard are deliberately blank until you supply them.
This tool performs the arithmetic only. It does not look up a factor from your age or sex, estimate biological ability, or assume that an age standard is a world record.
Adjusted time = time × factor; age grade = open standard ÷ adjusted time × 100; age standard = open standard ÷ factor
Find the matching table
Alan Jones and Tom Bernhard’s published road-running tables include separate editions and supporting documentation. Choose the distance, age and sex category in the edition required by your event. Track and road standards can differ; do not mix them. World Masters Rankings also provides age-grading resources.
Worked arithmetic example
For illustration only, a time of 1,500 seconds, a supplied factor of 0.8000 and a supplied open standard of 900 seconds give an adjusted time of 1,200 seconds and an age grade of 75%. These illustrative inputs do not represent a particular age, sex, event or published table row.
Interpret the result
A percentage compares your time with the selected standard. It is not a race placing, a medical assessment or a guarantee of equivalence between different races. Values above 100% are possible when a performance exceeds the selected table standard; the calculator does not cap them.
Calculations use unrounded inputs and intermediate values. This is running-time arithmetic, not a complete competition scoring engine: apply any competition-specific timing, rounding or eligibility rules separately. It does not support field-event distance multipliers or changed-distance hurdle events.