What Is Age Grading in Running?

If you’ve ever looked at parkrun results or masters athletics results, you may have seen something called an age graded percentage. Age grading is one of the most useful ways to compare running performances fairly across different ages and between men and women, but many runners don’t fully understand what it actually means.

In simple terms, age grading adjusts your race time based on your age and sex so that performances can be compared on a level playing field. A 55-year-old running a 22-minute 5k is not the same performance as a 25-year-old running a 22-minute 5k. Age grading accounts for the physiological changes that happen as we get older and converts performances into a percentage score.

This makes age grading one of the best ways to measure running performance over time, especially for masters athletes, club runners, and anyone interested in long-term improvement rather than just raw finishing times.

How Age Grading Works

Age grading works by comparing your race time to the best recorded performance for your age and event. Statistical factors are applied to your time to calculate an equivalent open-age performance and an age graded percentage.

The age graded percentage is calculated by comparing your performance against a world best standard for your age group. A score of 100% would represent a world record level performance for your age. Most runners will fall well below this, but the percentage allows performances to be compared fairly across ages.

For example, a 50-year-old runner with a 65% age grade performance may be performing at a similar competitive level within their age group as a 30-year-old runner with a 65% age grade performance.

If you want to calculate your own score, you can use the age grade calculator on this site to see how your performances compare across age groups.

What Is a Good Age Grade in Running?

Age grade percentages are usually grouped into performance standards. While there is no official universal classification, the following guide is commonly used in running clubs and masters athletics:

Age Grade %	Performance Level
80%+	National Class
70–79%	Regional Class
60–69%	Strong Club Runner
50–59%	Club Runner
40–49%	Recreational Runner
Below 40%	Beginner

Most recreational runners will fall between 40% and 55%. Competitive club runners are often between 60% and 70%, while very strong masters athletes can achieve 70% or higher.

Age grading is particularly useful because it allows you to track performance over time. Even if your race times get slower as you get older, your age graded score may stay the same or even improve, which means you are maintaining or improving your performance relative to your age group.

Why Age Grading Is Useful

Age grading is useful for several reasons.

First, it allows runners of different ages to compare performances fairly. This is why it is often used in parkrun results and masters athletics competitions.

Second, it is a good way to track long-term performance. Instead of focusing only on race times, runners can track whether their age graded percentage is improving year after year.

Third, it can be used to set realistic performance goals. For example, aiming for a 60% age grade performance is a good target for many club runners, while aiming for 70% would represent a very strong performance.

Finally, age grading helps put performances into context. A runner may feel disappointed with a time, but when they see their age graded score, they may realise it is actually a very strong performance for their age group.

Using Age Grading in Your Training

Age grading can be a useful tool when setting training goals and race targets. Instead of only chasing faster times, runners can aim to improve their age graded score. This is particularly useful for masters athletes who want to remain competitive as they get older.

For example, a runner may aim to maintain a 60% age grade across different distances, or improve their age graded performance year to year rather than focusing purely on personal best times.

Age grading can also help coaches and athletes compare performances across different athletes and age groups, making it a useful coaching tool as well as a performance metric.

If you are unsure what your age graded performance is, you can use the calculator on this site to calculate your age grade percentage and equivalent open performance.

Final Thoughts

Age grading is one of the best ways to compare running performances across different ages and track long-term performance. While finishing times and personal bests are still important, age graded performance provides a more complete picture of how strong a performance really is.

Whether you are a beginner runner, a club runner, or a masters athlete, age grading can help you understand your performance better and set realistic training and racing goals.

If you want help improving your running performance, structuring your training, or working towards a specific race goal, you can also explore my coaching services, where I help runners improve performance through structured training, pacing strategies, and endurance performance coaching.