About This Site
This website is an independent, unofficial tool built for people who follow James Smith’s no-nonsense, evidence-based fitness philosophy. We are not affiliated with, endorsed by, or connected to James Smith PT Ltd or any of his official products or services.
Our calculator was built to fill a gap: a free, simple, science-backed tool that helps everyday people understand their calorie and macro targets in plain language — without confusing jargon or paid subscriptions.
Who Built This
This site was created by a small team of fitness enthusiasts and web developers based in the UK. We have personally used calorie tracking and macro-based eating to manage weight and improve health — and we wanted a tool that was honest about how the maths works.
We are not registered dietitians or medical professionals. Our tool is based on the Harris-Benedict equation, a widely validated formula used by nutritionists worldwide. We recommend consulting a qualified professional for medical advice.
What This Calculator Does
Using the Harris-Benedict equation, the calculator estimates:
- Your Total Daily Energy Expenditure (TDEE)
- Daily calorie target based on your goal
- Recommended protein, fat, and carbohydrate intake
- A simple breakdown you can apply immediately
We show you the formula we use, not just the output. You should understand your numbers — not just receive them.
Why We Built It
Most free calorie calculators hide their methodology or push paid upgrades. We built a tool that is transparent, free, and focused on long-term understanding.
Our Commitment to Accuracy
- Using peer-reviewed formulas (Harris-Benedict, Mifflin-St Jeor)
- Being transparent about limitations
- No unsupported health claims
- Results are estimates, not medical advice
- Keeping the tool free
Important Disclaimer
All results from this calculator are estimates for informational purposes only. They are not medical advice. If you have a health condition, consult a healthcare professional.
Contact Us
We welcome feedback and suggestions. Please use the contact form on this site.