Track Your Fitness.
Calculate With Confidence.
Free calculators for BMI, TDEE, BMR, macros, and more. Science-based formulas, instant results, zero data sent to servers.
SportyCalc is a free collection of fitness and body calculators that run entirely in your browser. Whether you want to check your BMI, estimate daily calories, plan macros, or track body composition, you get instant results with no sign-up and no data sent to any server. We use established scientific formulas so you can trust the numbers—and your privacy stays protected.
Take the Quiz!
Test your fitness knowledge in 5 quick questions. Get instant green/red feedback and see how you score.
BMI Calculator
Body Mass Index
BMR Calculator
Basal Metabolic Rate
TDEE Calculator
Total Daily Energy Expenditure
Calorie Calculator
Daily calorie needs
Carbohydrate Calculator
Daily carb intake
Macro Calculator
Protein, carbs, fat
Body Fat Calculator
Navy method estimate
Lean Body Mass
Boer formula, LBM estimate
Heart Rate Zones
Training zones
1RM Calculator
One-rep max
Protein Intake
Daily protein needs
Water Intake
Daily hydration
Calories Burned
Activity calories
Power-to-Weight
W/kg, hp/lb ratio
Calorie Deficit
Time to reach target weight
Healthy Weight
Ideal body weight formulas
Ideal Body Weight
IBW, Robinson, Miller, Devine, Hamwi
Running Pace
5K, 10K, marathon finish time
Pregnancy Weight Gain
IOM guidelines, healthy gain range
Smart fitness, not stressful
At SportyCalc, we believe fitness should be smart, not stressful. That’s why we built a complete suite of free, accurate calculators designed specifically for athletes, military personnel, and anyone serious about their health and performance.
When you use our tools, you stop relying on guesswork and start making data-driven decisions.
With our TDEE Calculator, you’ll know exactly how many calories your body needs. Pair it with the Macro Calculator, Carbohydrate Calculator, and Fat Intake Calculator to build a nutrition plan that actually matches your goals — whether you’re cutting fat, building muscle, or maintaining peak performance.
Tracking body composition becomes effortless too. Our Body Fat Percentage Calculator, Army Body Fat Calculator, Waist-to-Hip Ratio, and Waist-to-Height Ratio tools give you clear insights into your progress. Military users especially love the Air Force PT Calculator, which follows the latest 2026 standards to help them stay mission-ready.
Want to know how old your body really is? Our Fitness Age Calculator reveals your biological fitness level based on science-backed VO2max estimation. Many users are shocked to discover their Fitness Age is 8–12 years younger — or older — than their actual age.
Training smarter is easier when you understand intensity. Use our Heart Rate Zone 2 Guide and Sleep Cycle Calculator to optimize recovery and endurance. Even occasional social choices become clearer with the Blood Alcohol Content (BAC) Calculator.
Whether you’re preparing for a military PT test, trying to lose stubborn fat, building muscle, or simply want to feel and perform better, our calculators give you the precise numbers you need to succeed.
No subscriptions. No ads in the tools. Just clean, fast, and accurate calculators that help real people get real results.
Thousands of athletes, service members, and fitness enthusiasts already use SportyCalc every week to track progress, optimize nutrition, and make better decisions.
Ready to take the guesswork out of your fitness journey? Explore our full collection of calculators and start building a stronger, healthier version of yourself today.
Fitness Guides
Step-by-step guides to reach your goals.
What Makes SportyCalc Stand Out?
Research-Driven
Equations supported by scientific studies (e.g., Mifflin-St Jeor, Navy Body Fat, and more).
Fully Secure
All your personal health info stays right in your browser—no sharing ever.
Optimized for Mobile
Access it easily at the gym, while cooking, or on the go.