Blog
- New: an ovulation calculator that's upfront about what an estimate can and can't tell you
An instant, shareable ovulation and fertile-window calculator using the standard calendar method — honest about its limits, not a substitute for medical guidance.
2026-08-14 - New: a calories burned calculator that shows its work
An instant, shareable MET-based calories burned calculator — transparent about the formula and honest that it's an estimate, not a diet plan.
2026-08-14 - New: a water intake calculator that shows its math, not just a number
Our hydration calculator explains the 33 ml/kg guideline, cross-checks it against the imperial rule of thumb, and shows ml, oz, and cups at once.
2026-08-13 - New: a protein target calculator that gives you a range, not a fake-precise number
Our protein intake calculator turns your weight and goal into a daily protein range in grams — honest about the real uncertainty, not a single falsely precise figure.
2026-08-13 - New: a pregnancy due date calculator that tells you the honest odds
Our due date calculator uses Naegele's rule and tells you upfront that only ~5% of babies arrive on their exact due date.
2026-08-13 - New: split any calorie target into protein, carbs, and fat
Our macro calculator turns a daily calorie target into protein, carb, and fat grams using diet-style presets or your own custom percentages.
2026-08-13 - New: an ideal weight calculator that shows you three numbers, not one
Why we built the ideal weight calculator to show Devine, Robinson, and Miller side by side instead of picking a winner.
2026-08-13 - New: a heart rate zone calculator built on the Karvonen method
Why our heart rate zone calculator uses resting heart rate, not just age, to set your five training zones.
2026-08-13 - New: a daily calorie calculator that shows deficit and surplus targets side by side
Our calorie calculator (TDEE) builds on the Mifflin-St Jeor equation and shows honest, adjustable deficit and surplus targets — not just one number.
2026-08-13 - New: a body fat calculator that tells you its own margin of error
An instant U.S. Navy method body fat calculator that states its real ±3-4% margin of error upfront, instead of pretending a tape measure is a lab scan.
2026-08-13 - New: a BMR calculator that names its formula and its limits
Our BMR calculator uses the Mifflin-St Jeor equation, shows its work, and is honest about what a rest-metabolism formula can't measure.
2026-08-13 - New: a BMI calculator that tells you what BMI can't tell you
An instant, shareable BMI calculator that's upfront about the standard formula's real limits — no inflated claims of precision.
2026-08-13