Your Fitness.
Scientifically Calculated.
Protein, calories, creatine, body fat — calculate everything you need for your training. Evidence-based, free, no sign-up required.
8
Specialized Calculators
100%
Evidence-Based
$0
Completely Free
<60s
Results In Seconds
Most Popular Calculator
Your Complete Fitness Plan In 5 Minutes
- check_circleProtein, calories, creatine, body fat combo
- check_circleCalculates optimal fitness plans
- check_circleComplete research-based recommendations
- check_circle5 minutes max, free, no sign-up required
Calculators at a Glance
Fitness Checkup
Complete 7-step wizard for personalized fitness plan, macro calculation, and supplement recommendations.
Protein Calculator
Calculate your optimal daily protein intake based on body weight, training goals, and activity level.
Calorie & Macro Calculator
Estimate your daily caloric needs and macro breakdown using the Mifflin-St Jeor formula.
Creatine Calculator
Precision dosing for loading and maintenance phases based on your body weight.
Body Fat Calculator
Estimate your body fat percentage using the validated US Navy method.
Supplement Stack Builder
Build a data-driven supplement protocol tailored to your performance goals.
Supplement Cost Calculator
Calculate your monthly and yearly supplement costs across budget, mid-range, and premium tiers.
Cold Plunge ROI Calculator
Calculate break-even point and ROI for investing in a home cold plunge setup.
How It Works
Choose a Calculator
Choose the calculator to customize to your needs and fine-tune your supplement regimen.
Enter Your Data
Enter your data and our algorithms will calculate precise recommendations for you.
Get Your Plan
Get your plan with all your results, and get it into your Fitness Checkup.
FAQ
What are the benefits of using Supplement-Calculator?
Our calculators use peer-reviewed formulas to give you accurate, personalized supplement dosing and body composition metrics — no guesswork involved.
Are the calculations scientifically validated?
Yes. Every calculator uses established scientific formulas such as the US Navy body fat method or evidence-based creatine dosing protocols.
Is Supplement-Calculator free?
100% free. No sign-up required, no hidden costs, no premium tier. Just accurate results.
What is the Supplement Stack Builder?
An interactive tool that helps you build a personalized supplement protocol based on your fitness goals — whether that's muscle building, fat loss, or performance.
Ready? Start Your Fitness Checkup.
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