Resources
Work out the numbers before the start line.
Two calculators, both free and both usable without an account. Your results carry over to the race you're training for once it's in your archive.
The guides explain what to do with the numbers once you have them.
Numbers are easier when the race is already in your archive.
Follow a race and the calculators start from its distance and your last time at it, rather than from a blank field.
Guides that use these numbers
All articles →Guide
Heart Rate Training 101: Decoding Your Data for Better Performance
You’re running slow, but your watch says Zone 5. Are you unfit, or is your data wrong? We …
TrainingThe Laws of the Long Game: Science vs. Tradition in Running
Are you following outdated running rules? We dive into the science behind the 10% rule, ra…
TrainingThe Base Phase: Why Running Slower is the Secret to Your Next PB
Most runners spend their training in the 'Grey Zone'—too fast to recover, too slow to get …