About CalcMacros
Free, accurate fitness calculators. No accounts. No paywalls. No BS.
Our Mission
Everyone deserves accurate, science-backed nutrition data without signing up, paying a subscription, or wading through ads to find the answer. CalcMacros exists to give you your numbers instantly and get out of your way.
We believe that health and fitness information should be accessible to all. Our tools are designed with a "user-first" philosophy—prioritizing speed, accuracy, and a clean interface over marketing gimmicks.
What We Offer
- TDEE & Macro Calculator: Our flagship tool that provides a full goal-based calorie and macro breakdown in under 60 seconds.
- BMR Calculator: A specialized tool supporting three clinically validated formulas, including Katch-McArdle for those who know their body fat percentage.
- Blog: A repository of evidence-based guides on nutrition and fitness to help you understand the science behind the numbers.
Why Is It Free?
CalcMacros is supported by display advertising and affiliate recommendations. This allows us to keep the tools free for everyone. We have a strict policy: we don't sell your data, we don't require accounts, and we never put our core calculators behind a paywall.
Accuracy & Disclaimer
Our calculators use clinically validated formulas: Mifflin-St Jeor, Harris-Benedict (Revised), and Katch-McArdle. While these are the best tools available for estimating metabolic rate, please remember that individual metabolism varies.
All results are estimates. Always consult a qualified professional—such as a doctor or registered dietitian—before making significant changes to your diet or exercise routine.