About TDEEMacroCalculator.com

What We Build

The site includes a core TDEE and macro calculator supporting three established scientific formulas - Mifflin-St Jeor, Harris-Benedict, and Katch-McArdle - alongside dedicated calculators for calorie deficit planning, protein intake, bulking and cutting phases, body fat estimation using the US Navy method, BMI, ideal weight ranges, and calorie burn by activity type.

For people following specific diets, we offer pre-configured calculators for ketogenic, vegan, IIFYM flexible dieting, high-protein, intermittent fasting, carnivore, and Mediterranean dietary patterns.

Two AI-powered tools use Google's Gemini model: a 7-day meal plan generator that creates personalized plans matching your exact macro targets, and a fridge recipe generator that suggests macro-aware recipe ideas from ingredients you already have on hand. Both run through Vercel AI Gateway and stream results in real time.

Our Approach to Accuracy

The formulas used here are the same ones regularly referenced by registered dietitians, sports nutritionists, coaches, and researchers. They are not proprietary and they are not invented for this site. The value of the tool is not secret math. It is putting established formulas into a fast, usable format with clearer guidance than most people get from generic calorie charts.

All calculators provide estimates, not certainties. Individual metabolism varies, and real-world calorie needs can differ meaningfully from a formula result. The right way to use any calculator is to treat it as a starting point, then adjust based on actual bodyweight trend, training performance, and adherence over the next 2 to 4 weeks.

Macro ratios are based on established research and sports nutrition guidelines rather than arbitrary numbers. Protein requirements for muscle retention and muscle gain are especially well established, which is why values around 1 gram per pound remain a common conservative upper bound in practice. The medical disclaimer exists for a reason: these tools are genuinely useful for healthy adults, but they should not be the sole source of guidance for people with medical conditions that affect metabolism, digestion, or nutrition requirements.

Imperial and Metric Units

Both unit systems are fully supported. We default to Imperial because most of our US-based users are more familiar with pounds and feet, but switching to metric is one click. Metric is especially useful in cooking and meal prep because grams are far more precise than cups or rough visual estimates. A kitchen scale is one of the simplest ways to improve nutrition tracking accuracy, which is why we treat unit choice as practical guidance, not just a feature checkbox.

Who Uses These Tools

Our users include people just starting their fitness journey who want to understand how many calories they actually need, experienced gym-goers planning bulking and cutting cycles, people tracking macros using flexible dieting approaches, athletes optimizing nutrition for performance, and professionals such as personal trainers who use the tools as a quick reference with clients.

The gym and bodybuilding community represents a particularly engaged segment because macro tracking has become standard practice there, and accurate tools are genuinely valued. But the site is not built only for lifters. It is equally intended for anyone who wants cleaner answers to basic nutrition questions without paying for access.

About SquarepegIdeas

TDEEMacroCalculator.com is a SquarepegIdeas project. SquarepegIdeas builds practical free tools across multiple domains. Our other tools include BusinessDayCalculator.org for calculating working days and payment deadlines, PaycheckTakeHomeCalculator.com for net pay estimation after tax, and RentVBuy.net for comparing the true cost of renting versus buying a home.

Contact: hello@tdeemacrocalculator.com