Average Triathlon Finishing Time Calculator
A triathlon finishing time is simply the sum of five sequential segments — the swim, the first transition (T1), the bike, the second transition (T2), and the run — but many first-time triathletes underestimate how much transition time actually adds to a…
DIY Sports Drink Calculator
Commercial sports drinks are formulated around two key numbers — carbohydrate concentration and sodium concentration — and both can be replicated fairly closely at home with plain sugar, table salt, and water for a fraction of the cost. This calculator…
Fish Weight Calculator
Weighing a fish on an actual scale, especially a big one intended for release, isn’t always practical or good for the fish’s health, which is exactly why anglers have long relied on a simple length-and-girth formula to estimate weight…
Hull Speed Calculator
Every displacement-hull boat — from a small sailing dinghy to a large trawler — has a theoretical maximum efficient speed determined almost entirely by its waterline length, a limit boat designers and sailors call “hull speed.” This…
Swim Time Converter
Competitive swimming is contested in three distinct pool configurations — short course yards (25-yard pools, standard in US college and high school swimming), short course meters (25-meter pools), and long course meters (50-meter pools, the Olympic…
Hiking Time Calculator
Hiking time isn’t just distance divided by walking speed — climbing adds a real time cost that flat-ground pace calculations completely miss. This calculator uses Naismith’s rule, a formula devised in 1892 by Scottish mountaineer William W.…
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…