TOOLS

Pace, mileage, race predictions

No account, no email wall. Just the numbers.

Pace calculator

Enter a distance and a time to get your pace per mile and per kilometer.

Distance
Unit
Hours
:
Min
:
Sec
Pace / mile
—
Pace / km
—
Speed
—

Race time predictor

Based on a recent race result, using the Riegel formula — a standard endurance prediction model. Best used with a race from the last 4–8 weeks at similar fitness.

Recent distance
Hours
:
Min
:
Sec
DistancePredicted timePace / mile

Fueling calculator

General carb, fluid, and sodium targets based on session duration and conditions. Ranges reflect standard endurance nutrition guidance — practice your numbers in training, not on race day, since individual sweat rate and tolerance vary.

Hours
:
Min
Conditions
Carbs / hour
—
Fluid / hour
—
Sodium / hour
—
Total for session
—
Roughly translates to
—