Max Heart Rate Calculator
Maximum heart rate (max HR) is the fastest your heart can safely beat during maximum physical exertion, and it’s the foundation almost every training heart-rate-zone system is built on. Since directly testing true max HR requires a supervised,…
MET Minutes Calculator
MET-minutes are the standard unit public health organizations use to measure physical activity volume in a way that’s comparable across completely different activities — a MET-minute figure from swimming laps and a MET-minute figure from brisk…
Target Heart Rate Calculator
Target heart rate tells you the beats-per-minute range to aim for during a workout to hit a specific training intensity. This calculator uses the Karvonen method, which factors in your resting heart rate alongside your estimated max heart rate — a more…
VO2 Max Calculator – Aerobic Capacity
VO2 max — the maximum volume of oxygen your body can use during intense exercise, measured in milliliters per kilogram of body weight per minute — is considered the gold-standard measure of aerobic fitness. This calculator uses the Cooper test, a simple…
Marathon Pace Calculator
Marathon pace calculation tells you the exact per-kilometer and per-mile speed you need to sustain for 26.2 miles (42.195 km) to hit a specific goal finish time. Unlike a general running pace calculator, this tool is built specifically around marathon…
Bike Gear Calculator
Gear inches is cycling’s standard way of comparing gearing setups across completely different bike types — road, mountain, track, folding — by converting chainring teeth, cog teeth, and wheel size into a single comparable number. It tells you, in…
Bike Pace Calculator
A ride’s finishing time only tells part of the story — average speed and per-kilometer pace are what actually let you compare one ride against another, plan a future route’s expected duration, or check progress against a personal best over a…
Cycling Heart Rate Zone Calculator
Training by heart rate zone lets a cyclist target a specific physiological effort level directly, rather than guessing intensity from feel or speed alone, which is especially useful in cycling where terrain and wind make speed a poor stand-in for actual…
Cycling Wattage Calculator
Cycling wattage — the power output a rider must sustain, measured in watts — is the single most reliable way to gauge cycling effort, because unlike speed it isn’t distorted by wind, hills, or drafting. A power meter reads the same wattage on a…
Ape Index Calculator
Ape index compares arm span directly against height, producing a single number that’s become a genuinely popular talking point in rock climbing, basketball, boxing, and swimming communities, where a longer reach relative to height is often…