Age Grade Percentage Calculator

Work out age grade percentage instantly with clear inputs, formula shown and shareable results.

About Age Grade Percentage Calculator

Age-grade percentage is the age-and-sex world standard divided by your actual time. 42 minutes against a 28:30 standard is 67.9%, so a time of 35:38 would be needed to reach the 80% national-class threshold. The measure lets a 70 year old and a 25 year old compare performances meaningfully.

Formulas

Age-grade percentage

percentage = standard time / actual time x 100

Target time

target = standard / desired percentage

Worked example

With the default values below, Age Grade Percentage Calculator returns Age-Grade Percentage of 67.86%. Change any input above and every figure here is recalculated in your browser.

Inputs used

World standard time for your age and sexminimum 0.1 min: 28.5 min
Your timeminimum 0.1 min: 42 min

Results

Age-Grade Percentage: 67.86%
Time Behind The Standard: 13.50 min
Time Needed For 80%: 35:38
Performance Class: Local class - above average

Step by step

1Values used
2Age-grade percentage
3Target time
4Age-Grade Percentage= 67.86
5Time Behind The Standard= 13.50 min
6Time Needed For 80%= 35:38
7Performance Class= Local class - above average

Assumptions and limits

The result is derived only from the 2 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.
This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

This is an estimate from population-average equations, not a medical or diagnostic assessment. Individual results vary with genetics, training history and technique. Seek advice from a qualified coach or clinician before making significant changes to training.

Frequently Asked Questions

Where do the standards come from?

World Masters Athletics publishes tables of the best recorded performance for each age, sex and distance, updated periodically.

Does age grading favour older athletes?

No - it is designed to remove the age advantage, so a 60% grade means the same relative standard at any age.