About FitnessCalcs
Reliable, evidence-based fitness calculators for anyone who wants quality information, not guesswork, guiding their health and training decisions.
Our Mission
To bridge the gap between exercise science research and practical application by providing reliable, well-researched fitness calculators that help people make informed decisions about their health, training, and nutrition.
The Problem We Solve
🚫 Misinformation Overload
The fitness industry is saturated with unqualified "influencers" promoting pseudoscience and quick fixes.
📱 Inaccurate Tools
Most fitness apps and calculators use outdated formulas or lack scientific validation.
🎯 Generic Advice
One-size-fits-all recommendations ignore individual differences and training experience.
Our Solution
🔬 Research-Based
Our calculators use established research and validated methods from exercise science and sports nutrition.
🎯 Quality Focus
Designed for people who want reliable tools and understand that context matters in fitness.
📚 Educational Focus
Comprehensive explanations help you understand the "why" behind every calculation.
The Story Behind FitnessCalcs
FitnessCalcs was born during Game 6 of the intense 2025 Pacers vs Knicks playoff series - a collaboration between Claude Code (Anthropic's AI coding assistant) and @juddlyon, a developer based in Atlanta who was frustrated with the lack of scientifically accurate fitness tools available online.
Fun Fact: The entire site was built during Game 6 commercial breaks and halftime, powered by playoff energy, Atlanta vibes, and a shared passion for evidence-based fitness! 🏀⚡🍑
Why We Built This
After years of watching people struggle with conflicting fitness information and unreliable calculators, we decided to create the resource we wished existed. Our formulas come from established research, our recommendations are backed by evidence, and every calculation includes the context you need to apply it sensibly.
Our Standards
- Research-Based: Formulas from established studies and validated methods
- Transparent Sources: Clear references for our recommendations
- Practical Application: Real-world context for applying the numbers
- Mobile-First Design: Works perfectly on any device, anywhere
- Educational Content: Learn the reasoning behind every calculation
- Regular Updates: Tools improved as better methods become available
We're not trying to replace your coach or your critical thinking - we're here to give you the accurate tools and information you need to make informed decisions about your training and nutrition.
The Team
Claude Code
AI Development Partner
Anthropic's official coding assistant, responsible for the technical implementation, scientific research validation, and ensuring every calculator meets the highest standards for accuracy and user experience.
@juddlyon
Project Vision & Direction
Developer and fitness enthusiast who recognized the need for scientifically accurate fitness tools. Provides strategic direction, user experience insights, and ensures the site serves the intermediate/advanced athlete community effectively.
Our Principles
Quality Over Hype
We prioritize established research over viral fitness trends. We avoid fads and focus on methods with solid evidence behind them.
Context Is King
Numbers without context are meaningless. We provide the background, limitations, and practical applications for every calculation.
Intellectual Honesty
We acknowledge limitations, discuss conflicting research, and update our positions when new evidence emerges.
Accessible Yet Thorough
We provide clear explanations without dumbing things down. Whether you're new to fitness or experienced, you'll find useful information.
Ready to Try Our Calculators?
Experience the difference that scientific accuracy makes in your training and nutrition planning.
Privacy & Disclaimers
🔒 Privacy First
- • No personal data collection or storage
- • No cookies or tracking scripts
- • All calculations performed locally in your browser
- • Privacy-focused analytics (no personal identifiers)
⚖️ Medical Disclaimer
All calculators are for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Individual results may vary significantly.
Always consult qualified healthcare professionals before beginning any exercise program or making significant changes to your diet.
Built with the Vibe 🏀⚡
Late-night Game 6 energy, scientific precision, and a shared belief that fitness deserves better tools.
Every line of code written with care during commercial breaks and timeouts.
Science never sleeps, and neither did we during this playoff run.