Free calorie, macro & fitness calculators
Caloritix is a free online hub for the TDEE calculator, macro calculator, calorie deficit calculator, body fat, water intake, one rep max and sleep cycle tools — built for mobile, with no accounts and no data uploads.
Calorie & macro calculators
Plan your calories, macros and deficit
The three most-used Caloritix tools — start here to dial in your daily intake.
TDEE Calculator
Estimate your Total Daily Energy Expenditure using the Mifflin–St Jeor formula.
Open calculatorMacro Calculator
Split your daily calories into protein, carbs and fat for cutting, maintaining or bulking.
Open calculatorCalorie Deficit Calculator
Find the daily calorie target to reach your goal weight in a realistic time frame.
Open calculatorBody composition & wellness
Track body fat, hydration, strength & sleep
Body Fat Calculator
Estimate body fat percentage, fat mass and lean mass using the US Navy tape method.
Open calculatorBMR Calculator
Calculate your Basal Metabolic Rate — the calories your body burns at complete rest — using Mifflin–St Jeor.
Open calculatorWater Intake Calculator
Calculate how much water to drink each day based on weight, activity and climate.
Open calculatorOne Rep Max Calculator
Estimate your 1RM with Epley, Brzycki and Lombardi, plus training percentages.
Open calculatorSleep Cycle Calculator
Plan bedtimes and wake times around 90-minute sleep cycles for better rest.
Open calculatorHow Caloritix works
Pick a calculator
Choose from 7 free tools for nutrition, body composition, hydration, strength or sleep.
Enter your details
Use metric or imperial units. Inputs stay in your browser — nothing is uploaded.
Get instant results
See your number, read a plain-English explanation, copy or reset in one click.
Private by design
No accounts. Inputs never leave your browser.
Instant results
Built for speed. No spinners, no API calls.
Works everywhere
Mobile, tablet, desktop — same fast experience.
Trusted formulas
Mifflin–St Jeor, US Navy, Epley and more.
Popular goals
Jump straight to the right tool for what you're working on.
All calculators
Frequently asked questions
Are the Caloritix calculators really free?+
Yes. Every calculator on Caloritix is 100% free, requires no account and has no usage limits.
Do you store my data?+
No. All calculations run locally in your browser. Your weight, height, age and other inputs are never sent to a server.
Which formulas do you use?+
We use peer-reviewed formulas: Mifflin–St Jeor for BMR, the US Navy method for body fat, Epley/Brzycki/Lombardi for 1RM and the 90-minute REM cycle for sleep planning.
Can I use imperial units like pounds and inches?+
Yes. Every calculator supports both metric (kg, cm) and imperial (lb, ft/in) units.
Is Caloritix medical advice?+
No. Caloritix gives general estimates for educational purposes. Always consult a qualified health professional before making changes to your diet or training.
Which calculator should I start with?+
Start with the TDEE Calculator to learn your daily calorie needs, then use the Macro Calculator to split those calories into protein, carbs and fat.
A quick note on results
Caloritix calculators give general estimates based on population-level formulas. They are not medical, nutritional or fitness advice. Always consult a qualified professional before changing your diet, training or sleep — see our full disclaimer.