About SmartDietChoices

What we do

SmartDietChoices is a collection of tools for everyday decisions about food and body composition: how many calories to eat, how to split your macros, how much protein you need, what your maintenance calories are, and more. Every calculator runs instantly in your browser, works in both metric and imperial units, and stores nothing. There are no accounts, no paywalls, and no data harvesting.

Why we are different

Most online calculators hand you a number and expect you to trust it. We think you deserve to see the reasoning. That is why each tool states the formula it uses in plain language, shows a worked example with real numbers, and links to the exact sources on our methodology page. If you disagree with an assumption, you can see it and adjust. Transparency is not a marketing line for us; it is how the whole site is built.

Our commitment to accuracy and safety

We use established, peer-reviewed formulas such as Mifflin-St Jeor and Katch-McArdle, and food data from USDA FoodData Central. We also build in guardrails: our weight-loss tools will not recommend calorie targets below safe floors, because a calculator should never nudge someone toward harm for the sake of a faster result. These tools are educational and are not a substitute for personalized advice from a doctor or registered dietitian.

Who this is for

Whether you are starting your first fat loss phase, planning a lean bulk, dialing in macros for a cut, or just curious about your numbers, these tools meet you where you are. Beginners get plain-language explanations and safe defaults; experienced lifters get the control and precision they expect. Explore the full set from the homepage, or jump straight to the TDEE calculator to find your maintenance calories.

How we build and check our tools

Every calculator starts from a formula in the published scientific or clinical literature, never an invented shortcut. We implement the equation, then verify it two ways: the worked example on each page is calculated by hand and must match what the tool returns, and an automated test suite runs those same cases on every build so a broken calculation cannot ship unnoticed. When guidelines give a range rather than a single value, such as protein needs or a healthy waist to height ratio, we present the range and explain how we apply it rather than pretending there is one exact answer.

How we keep content accurate

We review our formulas, reference values, and food data on a regular schedule and whenever a reader flags a problem. Each calculator page lists the sources behind it, and the methodology page gathers every equation, constant, and citation in one place. We write in plain language and avoid overstated claims: our tools produce estimates, and we say so clearly rather than promising outcomes. Where a topic touches health decisions, we point to the underlying research and to our health disclaimer instead of offering individual medical advice.

What we do not do

We do not sell supplements, meal plans, or coaching, and we do not invent experts, credentials, testimonials, or star ratings to look more authoritative than we are. We do not require an account, and calculator inputs stay in your browser rather than on a server, as our privacy policy explains. The site is supported by advertising, which lets the tools stay free; ads never change the numbers a calculator returns or the guidance we give.

Get in touch and corrections

Found a bug, spotted a formula you think is wrong, or have a tool you would like us to build? We would genuinely like to hear it, and we treat corrections seriously: verified errors are fixed and noted on the methodology page. Reach us through the contact page.