Plan a race
Find my pace
Know my fitness
Guides
All tools
Every calculator, chart, and planning tool — in one place.
Plan a race
Pick a race
Choose from 50+ marathons
Race predictor
Estimate finish time from a past result
Find my pace
Pace calculator
Solve for pace, time, or distance
Marathon pace calculator
Splits for 26.2 miles / 42.2 km
Half marathon pace calculator
Splits for 13.1 miles / 21.1 km
5K pace calculator
Splits for 5 kilometres
Pace chart
Reference table for common paces & finish times
Pace converter
min/km, min/mi, km/h, mph
km to miles converter
km ↔ miles — for race entries and GPS units
Pace per km calculator
min/km for any distance and time
Race finish time
Predict your finish from pace and distance
Split calculator
Even, negative, or progressive splits
Know my fitness
Heart rate zones
Train at the right intensity
VO2 max calculator
VDOT & training paces from a race time
My profile
Soon
Save your personal bests
Guides
Sub-3 marathon pace
Everything for a 2:59:59
5K pacing strategy
Go out right, finish strong
All pace guides
Target paces for every distance & time
