RunTools Calc is a free training calculator built for runners and coaches who care about accuracy.
Most running apps overcomplicate simple math. RunTools Calc focuses on what actually matters: splits, pace, and performance clarity—presented in a clean, readable format.
Features
• Calculate splits for any distance and total time
• View pace in min/mi, min/km, mph, and km/h
• Simple vertical split layout designed for quick reference
• Accurate pace formatting (no broken times like 3:60)
• Preset distances including Mile, 8K, 10 Mile, 15K, Half Marathon, and Marathon
• VO₂ calculator with fitness-level insight
• Built for athletes, coaches, and serious training
Whether you’re planning workouts, checking race pace, or coaching athletes, RunTools Calc gives you the numbers you need—without noise.