Calorie, BMI, TDEE & 1RM Calculators
Free browser-based health and fitness calculators — BMI, body fat, daily calories, macros, TDEE, one-rep max, running pace, heart rate zones, sleep, water intake, ideal weight, ovulation, and pregnancy due date. Your numbers never leave the browser.
Explore the Health & Fitness
TDEE Calculator
Calculate Total Daily Energy Expenditure and macro splits for cutting, maintenance, or bulking.
Launch ToolOne Rep Max Calculator
Estimate 1RM using 5 formulas (Epley, Brzycki, Lombardi, Mayhew, O'Conner) with training percentages.
Launch ToolPace Calculator
Calculate running pace per mile/km and predict race times for 5K, 10K, half, and full marathon.
Launch ToolA Health Calculator for Every Goal
Whether you are cutting, bulking, building a marathon training block, or just figuring out whether you are sleeping enough — these calculators turn the standard formulas into a number you can plan around. Coverage spans nutrition, body composition, strength, cardio, recovery, and reproductive health.
Nutrition: calorie, macro, TDEE, water intake. Body composition: BMI, body fat, ideal weight. Strength: one-rep max with five formula options. Cardio: heart rate zones, running pace, race-time predictor. Recovery: sleep cycle calculator. Reproductive: ovulation and pregnancy due date.
Health data is among the most sensitive information you own — your weight, your cycle dates, your heart-rate zones, your body-fat percentage. Most fitness calculators either email you a"result" that someone now has on file, or push you toward a signup that funnels the inputs into an ad-targeting profile. ToolWise keeps every calculation on the device: type your numbers, read the result, and nothing leaves the tab.
Key Advantages of ToolWise Health Calculators
- Transparent Formulas: Mifflin-St Jeor, Epley, Brzycki, Karvonen, US Navy body-fat — every calculator shows which peer-reviewed formula it uses.
- Absolute Privacy: Your weight, height, and cycle dates are processed on your device — never uploaded to a server that tracks them.
- Live Results: Numbers update as you type — no submit button, no page reload, no waiting on a fitness API.
- Zero Cost Barriers: The full health calculator set is free forever — no premium tier that gates macros or saves heart-rate zones.
Frequently Asked Questions
Are health calculations based on medical standards?
Yes. Our BMI, TDEE, Calorie, and Body Fat calculators are based on clinical guidelines from the World Health Organization (WHO), the Mifflin-St Jeor equation, and the Katch-McArdle formula.
How does the TDEE Calculator determine daily calorie expenditure?
It calculates your Basal Metabolic Rate (BMR) based on age, gender, height, and weight, then applies an activity multiplier to estimate the exact calories needed to maintain, lose, or gain weight.
Is my personal health data kept confidential?
Yes. We do not store, track, or transmit your body measurements, fitness numbers, or health answers. All computations happen in your browser.
Should these calculators replace professional medical advice?
No. ToolWise health calculators are educational tools designed for fitness planning and general wellness. Always consult a licensed healthcare professional for medical diagnosis or clinical nutrition programs.
100% Private
Your weight, height, and cycle dates stay on your device — no server, no tracking, no public profile.
Trusted Formulas
Mifflin-St Jeor, Epley, Brzycki, Karvonen, US Navy body-fat — these calculators use peer-reviewed formulas.
Always Free
Every health calculator here is free forever — no subscriptions, no daily limits, no signup wall.