Free Running Tools
12 tools. Instant results. No signup. No limits. Built for runners who want real answers.
01
Pace & Speed
Distance + time = pace. Instant results for any distance.
Open tool02What Can I Run?
Predict your race time from a recent result. Riegel & Cameron.
Open tool03Race Split Planner
Plan your race splits. Even or negative split strategies.
Open tool04Find My Training Paces
Easy, tempo, interval and rep paces from your race.
Open tool05Pace Converter
Convert between min/km, min/mi, km/h, mph instantly.
Open tool06How Good Is My Time?
Age-graded performance rating using WMA factors.
Open tool07Estimate My VO2max
VO2max and fitness classification from any race.
Open tool08My Heart Rate Zones
5-zone heart rate training with Karvonen method.
Open tool09Calories Burned
Estimate calories from distance, weight and pace.
Open tool10Treadmill vs Outdoor
Convert treadmill speed/incline to outdoor effort.
Open tool11Negative Split Strategy
Start slower, finish stronger. Plan your half splits.
Open tool12Run/Walk Planner
Plan run/walk intervals for any distance and goal.
Open tool