Running Calculators — Sports
Running form and pacing analytics: marathon pace, Couch to 5K progression, cadence and ground contact time, form power, and heart-rate decoupling. Decoupling and ground contact time need data from a watch or pod; pace and plan tools only need a target time.
All Running Calculators
Create a progressive Couch to 5K training plan from current fitness level and target date.
Calculate form power with inputs, formulas, and instant results.
Calculate gait cadence analyzer with inputs, formulas, and instant results.
Calculate ground contact time with inputs, formulas, and instant results.
Calculate heart rate drift (decoupling) with inputs, formulas, and instant results.
Calculate marathon pace per mile/km and projected finish time from training pace.
Convert race bib chip time to pace and calculate negative/positive splits.
Calculate race predictor – running time with inputs, formulas, and instant results.
Calculate run walk ratio with inputs, formulas, and instant results.
Calculate running economy with inputs, formulas, and instant results.
Track running shoe mileage and estimate when to replace them from weekly miles.
Calculate steps to km with inputs, formulas, and instant results.
Calculate steps to miles with inputs, formulas, and instant results.
Calculate stride angle with inputs, formulas, and instant results.
Calculate stride length with inputs, formulas, and instant results.
Calculate training pace with inputs, formulas, and instant results.
Calculate vo2 max (runners) with inputs, formulas, and instant results.
Calculate weather adjusted race predictor with inputs, formulas, and instant results.
Calculate pace and finish times
About Running Calculators
Running form and pacing analytics: marathon pace, Couch to 5K progression, cadence and ground contact time, form power, and heart-rate decoupling. Decoupling and ground contact time need data from a watch or pod; pace and plan tools only need a target time.
Whether you need to solve a one-time problem or verify your own calculations, these free tools cover the most common running scenarios. All results are computed in your browser — no data is sent to any server.
What You Can Calculate
This section includes 19 tools: Couch to 5K Training Plan Calculator, Form Power Calculator, Gait Cadence Analyzer, Ground Contact Time Calculator, Heart Rate Drift Decoupling Calculator, Marathon Pace Calculator, Race Bib Pace Calculator, Race Predictor Running Time, and 11 more. Each calculator is free to use with no signup required.