Free Running Calculators
Free running calculators for pace, race times, training zones, nutrition, and more. Fast, accurate, no signup required.
Pace & Speed
Calculate running pace, speed, finish times and split strategies for any distance.
11 calculators →
Race Prediction
Predict race times using proven formulas like Riegel, VDOT and age grading.
13 calculators →
Training
Calculate training zones, threshold paces, heart rate zones and VO2 max.
17 calculators →
Distance
Calculate running distances, weekly mileage, elevation adjustments and track lanes.
11 calculators →
Calories & Nutrition
Calculate calorie burn, hydration needs, race nutrition and fuelling strategies.
10 calculators →
Shoe & Gear
Track shoe mileage, find your size, plan rotations and gear up for any conditions.
8 calculators →
Injury & Recovery
Plan safe return to running, recovery timelines and cross-training alternatives.
9 calculators →
Race Planning
Plan race day strategy, taper schedules, goal times and logistics.
11 calculators →
Track & Field
Calculate lap times, lane staggers, wind corrections and track conversions.
8 calculators →
Running Maths
Calculate cadence, stride frequency, ground contact time and running economy.
9 calculators →
Gear & Equipment
Running shoe rotation, replacement schedules and gear management calculators.
2 calculators →
Physiology
Lactate threshold, VO2max estimation and physiological benchmarks from race results.
2 calculators →
Reference
Useful running reference guides, conversion charts and race data.
4 calculators →
RunCalcs — Free Running Calculators
RunCalcs offers 115+ free calculators across 13 categories. Every tool is fast, accurate, and requires no signup. Just enter your values and get instant results.
Browse all 115+ calculators or search above to find exactly what you need.