Body & Wellness Calculators

Nutrition, sleep, hydration and fitness calculators. All free, instant, no signup.

Calorie Needs Calculator

BMR and TDEE using Mifflin-St Jeor formula with activity multiplier.

Personalised daily hydration target based on weight, activity, and climate.

Calculate your accumulated sleep debt and cognitive performance impact.

Calculate all 5 heart rate training zones from age and resting HR.

Estimate cardiovascular fitness from resting and max heart rate.

Calculate WHR and assess cardiovascular risk classification.

Find your chronotype (morning lark, hummingbird, or night owl) and peak window.

Personalised daily fibre goal with best food sources.

Set a realistic step goal based on current activity and health target.