Methodology

Each calculator on Kalkmate publishes the formula it uses on its own page, beneath the calculator itself. We avoid hidden assumptions wherever we can — if a calculator needs a default (a tax rate, a bracket, a coefficient), it's shown on screen and editable.

Source list

• BMI bands — World Health Organization adult classifications
• TDEE — Mifflin-St Jeor equation, default sedentary multiplier
• Body fat — US Navy circumference method
• Currency rates — refreshed daily from Frankfurter (ECB feed)
• Tip norms — country-specific service customs

Found a bug?

Email hello@kalkmate.com with the calculator name, your inputs, and what you expected. We read every message.