Free Fitness Tools
Your Free Wellness
Dashboard
6 science-backed fitness tools. Zero sign-up required. Know your numbers, build your plan, and reach your goals.
Free Fitness Tools
Each tool connects to the next — enter your data once and get a complete wellness picture.
Calorie Calculator
Get your maintenance calories, goal targets, and safe daily ranges.
Use Free →📊BMI Calculator
Calculate your Body Mass Index and see your WHO category.
Use Free →🥗Macro Calculator
Find your ideal protein, carbs, and fat split for any diet.
Use Free →🍗Protein Calculator
How much protein you actually need — with food equivalents.
Use Free →💧Water Intake Calculator
Your optimal daily water intake based on weight and activity.
Use Free →🏋️One-Rep Max Calculator
Estimate your 1RM using 7 proven strength formulas.
Use Free →How It Works
Know Your Numbers
Use our calculators to find your BMI, daily calories, macros, and protein needs.
Build Your Plan
Tools connect together — your calorie target feeds into macros, which feeds into protein needs.
Stay Consistent
Track hydration, estimate your strength, and keep every aspect of your fitness dialed in.
Why FitFixLife?
Connected Tools
Each calculator feeds the next. Enter your data once, get a complete wellness picture.
Science-Backed Formulas
Mifflin-St Jeor, Katch-McArdle, Epley, Brzycki — peer-reviewed formulas used by professionals.
No Account Required
Use every tool instantly. No sign-up, no email gates, no friction.
Ranges, Not Prescriptions
We give you practical ranges and plain-language explanations — not clinical prescriptions.