Cycling Power Zone Calcs
Coggan (7) or British (6) zones from FTP.
OpenCycling Heart Rate Zone Calcs
%LTHR (Friel) or %HRmax (Polar). Running or cycling.
OpenLTHR Based Run HR Zones
Running heart rate zone calculator using %LTHR (Friel).
OpenLTP Based Run Pace Zones
Running pace zone calculator using %LTP (Friel).
OpenCycling Nutrition Calculator
Fuel (g/h & sugar tbsp), fluids (L/h & fl oz), sodium (mg/h & tsp salt), caffeine.
OpenBody Mass Index (BMI)
Compute BMI and category (imperial by default).
OpenBasal Metabolic Rate (BMR)
Mifflin-St Jeor (default); compare with others.
OpenSweat Rate Calculator
Classic sweat test - L/h and fl oz/h.
OpenRunning Pace Calculator
Distance/time - pace & speed.
OpenSwim Pace Calculator
Distance/time - /100m, /100y, speed, and common splits.
OpenRace Time Equivalents
Predict other distances (VDOT, Riegel, Cameron).
OpenZwift Calories from Watts
Avg W & time - kJ and kcal (efficiency slider).
OpenSwim CSS & Zones
400/200 test - CSS pace and send-offs (25/50/100).
OpenBaker's % Calculator
Hydration, yeast/starter, salt, totals.
OpenS/B/R Calories
Calories burned for Run, Bike (speed or watts), and Swim. + optional HR.
OpenCalories Burned
Estimate calories burned for a swim, bike, or run workout.
OpenMacro Calc
Macros in grams -> calories and percent breakdown.
OpenTSS Calc
Triathlon training stress score calculator with bike, run, and swim modes.
Open