What this experiment does
Scale weekly mileage to a year (and optionally many years), then divide by race distances.
A similar Fun calculator still accepts any pasted distance. This experiment starts from habit volume for a shareable punchline.
How it works
Yearly km = weekly × 52. Marathons = yearly ÷ 42.195. Halves and 5Ks use the same shared distance constants as the Fun tool.
Counts training kilometres as stacked race distances. It does not predict race fitness or count official finishes.
Frequently asked questions
Is this the same as the Fun marathon equivalents tool?
Same distance math. The Fun page takes any distance; this experiment turns weekly habit into a yearly (and lifetime) punchline.
Can I share the count?
Yes. Share Result copies a link with your weekly mileage and optional years.