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.

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.

Here is exactly what happens when you enter your numbers. Mifflin-St Jeor is the default equation in the main calculator, and it is also what the cutting, bulking, lean bulk, body recomposition, and calorie deficit tools use to estimate maintenance. Harris-Benedict is available as a comparison point. Selecting Katch-McArdle opens a body fat field, because that equation works from lean body mass instead of total bodyweight, so it cannot return a result until you supply a percentage. Whichever equation you choose produces a BMR, which is then multiplied by an activity factor to reach TDEE: 1.2 for a desk job, 1.375, 1.55 and 1.725 as training volume rises, and 1.9 for extremely active work. A sixth option at 2.0 covers twice-daily training. The 1.2 to 1.9 values are the standard published set, not numbers we tuned to make results look better. The methodology page cites the source for each equation.

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.

Editorial Team

Content and calculators are maintained by the TDEE Macro Calculator Editorial Team. We are not a medical practice, registered dietitian service, or personal training provider. Our role is to implement established public formulas, explain the assumptions behind them, and make the limits of each estimate clear.

Every calculator should be treated as a starting point for healthy adults, not a diagnosis or prescription. We prioritize transparent math, practical defaults, and source-backed explanations over personalized claims. Three pages document how that works in practice: the methodology page shows the equations and their citations, the editorial policy covers sourcing and corrections, and the medical review process states plainly what our review does and does not include.

Related Project

The same team also builds Meketo.com, a keto diet tracking and macro planning app. The two are separate products for different jobs. This site answers a calculation question in a few seconds and asks nothing of you. Meketo is for people who want to keep logging meals week after week on a ketogenic diet. If you came here for keto macros and want ongoing tracking rather than a one-time number, start there.

Contact

Questions, corrections, and reports of a calculator behaving strangely all go to hello@tdeemacrocalculator.com. If you can show a number is wrong, we want to hear it.