Magic Mile Calculator

Predict race times from a one-mile time trial (Galloway).

Mile time minutes

Mile time seconds

Predicted 5K 28.583

Predicted 10K 59.652

Predicted marathon 272.68

Formula: Galloway: scale mile pace per race

Step-by-step with your numbers:

1. Values used:

2. Mile time minutes = 8

3. Mile time seconds = 0

5. Predicted 5K = 28.583

6. Predicted 10K = 59.652

7. Predicted marathon = 272.68

Did we solve your problem today?

Jeff Galloway's Magic Mile predicts longer race times from a single hard mile.

The math behind it

Multiply the mile pace by 1.15 (5K), 1.2 (10K) or 1.3 (marathon) and scale by the race distance in miles.

An 8:00 mile → roughly a 28.6-min 5K and 4:32 marathon.

How hard should the mile be?

A true time trial — run it close to all-out for an accurate prediction.