Sweat Rate Calculator
Estimate hourly sweat rate from pre/post weights. Use it to plan hydration and electrolyte intake for long sessions.
Sweat Rate
Estimate hourly sweat rate from pre/post weights. Use it to plan hydration and electrolyte intake for long sessions.
Calculators give a starting estimate, not a clinical assessment. Pair with body composition data and a healthcare professional's input for personalized advice.
Calculators are screening tools, not diagnoses. Pair the result with body composition data and a healthcare professional’s input for personalised guidance.
Other calculators
The eight tools work better as a set than alone. Pick the next one that fits your question.
BMI
Get a baseline read on your body mass index. BMI is a starting point — not the whole story.
CalculatorTDEE
Total Daily Energy Expenditure — the calories your body uses in a normal day. Pick a goal-aligned target from there.
CalculatorBMR
Basal Metabolic Rate — calories burned at complete rest. The foundation under every calorie target you'll set.
CalculatorMacro
Split your daily calorie target into protein, carbs, and fat — anchored to bodyweight protein needs and your goal.
CalculatorHeart Rate Zones
Karvonen-method training zones using heart rate reserve. More accurate than the basic 220-minus-age method.
Calculator1RM
Estimate your one-rep max from a sub-maximal set. Most accurate at 3 to 8 reps.
CalculatorBody Fat % (7-site)
Jackson-Pollock 7-site caliper estimation. Tracks change month-over-month if you use the same caliper and tester.
CalculatorFFMI
Fat-Free Mass Index — height-adjusted lean-mass measure. Fixes BMI's biggest weakness for athletes. Pairs with body-fat % and BMI.
CalculatorPace
Convert between pace, speed, and time over distance. Solve for any one given the other two.
CalculatorWaist-to-Hip Ratio
Two measurements, one ratio. Better cardiovascular-risk predictor than BMI alone (Yusuf 2005, INTERHEART).
CalculatorCaloric Deficit / Goal Date
Daily caloric deficit needed to hit a goal weight by a target date, with safety guardrails on aggressive plans.