UltraCalculators

Health & Fitness Calculators

From tracking your Body Mass Index to planning a calorie deficit for sustainable weight loss, our health calculators use clinically backed formulas to help you make informed decisions about your wellbeing. Each tool references NHS guidelines and established nutritional science.

BMI Calculator
Health & Fitness
Calculate your Body Mass Index and weight category
TDEE Calculator
Health & Fitness
Calculate your Total Daily Energy Expenditure
Macro Calculator
Health & Fitness
Calculate your daily protein, carbs, and fat targets
Calorie Deficit Calculator
Health & Fitness
Plan your weight loss timeline with a daily calorie target
Protein Intake Calculator
Health & Fitness
Calculate your daily protein needs based on weight, activity level, and goals
One Rep Max Calculator
Health & Fitness
Estimate your one-rep max from submaximal lift data
Body Fat Calculator
Health & Fitness
Estimate your body fat percentage using the US Navy method
Pregnancy Due Date Calculator
Health & Fitness
Calculate your estimated due date from your last menstrual period or conception date