Race Time Improvement Calculator

To find out improved running times, all you need to do is to fill in the race result you want to improve. All the rest is done by our calculator. Our calculator comes up with the following numbers:

• race time improved by 1%
• race time improved by 2%
• race time improved by 3%
• race time improved by 4%
• race time improved by 5%
• race time improved by 7%
• race time improved by 10%

You can see running times in different units - they can be displayed in hours:minutes:seconds, only seconds, minutes or hours, even few more combinations. Choose the best option yourself.

If you need some custom % time improvements (which are not on the list), open the custom improvement section. Here, you can type in a particular value of percent improvement. The improved result will be displayed below.

Race time improvement calculator is based on simple time transformations. For example:
Target time improvement = 5% so, the new time will be:
improved time = race time × 95%.

You can calculate all the remaining time improvements in a similar way. If you are interested in calculating percentage changes or improvements in other areas of life, visit our percentage change calculator. It is more general and thus can deal with more problems and questions.

See the step-by-step example below to see how to use the race time improvement calculator. Let's assume that you have done a 10km race and you want to have a better result next time. Your time is:

race time = 48 min 35 sec

Our calculator provides the following results:

1% improved time = 48 min 5 sec

2% improved time = 47 min 36 sec

3% improved time = 47 min 7 sec

4% improved time = 46 min 38 sec

5% improved time = 46 min 9 sec

7% improved time = 45 min 10 sec

10% improved time = 43 min 43 sec

There is no calculation for a 6% improvement which is your target? Don't worry. Open the Advanced mode and type it in manually.

custom improvement = 6%

your better time = 45 min 40 sec

That's all! Simple, isn't it? If you want to discover, even more, go to the pace calculator.

The longer you run, the more you train, and the more difficult it is to cut minutes off your time. Probably you know that observation very well. Sometimes using a percentage to plan running improvements is much more practical. Highly trained athletes should expect improvements in the 2-4% range, while newbie runners can usually look for slightly better rates of initial enhancements.