Free tools
Calculators that use the published formulas
No sign-up and nothing stored. Each one names its sources and links the guide that explains it.
VO2 max calculatorFree VO2 max calculator from a home test: Cooper 12-minute run, 1.5-mile run, Rockport one-mile walk, or the heart-rate…Heart rate zone calculatorFree heart rate zone calculator using the Karvonen formula: enter resting and maximum heart rate, or your age, and get…Running cadence to BPM calculatorFree running cadence to BPM calculator: count your steps, get the music tempo that lands a beat on every step, plus the…50/30/20 budget calculatorFree 50/30/20 budget calculator: enter take-home pay for one or two partners and see needs, wants and savings, plus…