Calorie Calculator

About Calorie Calculator Tool

Calorie Calculator Tool is a free consumer nutrition tool. It estimates your daily calorie needs from the standard Mifflin-St Jeor equation, and publishes plain-language guidance on what those numbers mean — with particular depth on two situations where generic calorie advice falls short: after bariatric surgery and on GLP-1 medications.

Who publishes this site

This site is published by M4Quick Studios LLC, an independent digital studio. It is not operated by, funded by, or affiliated with any pharmaceutical manufacturer, supplement brand, surgical practice, telehealth provider or weight-loss programme. We do not sell consultations, meal plans or subscriptions.

What we are — and what we are not

• Our nutrition content is reviewed by a dietitian on our staff. Dietary guidance — calorie and protein targets, food choices, eating patterns — is a dietitian's field, and the pages they review carry a green banner saying so.
• We employ no doctor, nurse, pharmacist or surgeon. Anything touching diagnosis, medication or surgical management is outside what we can responsibly review, and we do not pretend otherwise.
• We will not blanket-badge the site. Stamping "medically reviewed" on every page would be easy and untrue. The green banner appears only where a dietitian genuinely reviewed the content, which is the only thing that makes it worth anything.
• We do not give individual advice. We cannot tell you your correct calorie intake, whether a symptom matters, or whether a plan is safe for you. Those need someone who can see your history and your labs.
• What we do is apply published formulas correctly, summarise authoritative guidance in plain language, show our sources, and be explicit about uncertainty.

Our editorial policy

• Sources are public and authoritative. We work from the Dietary Guidelines for Americans, USDA and MyPlate material, NIH and NIDDK, CDC, MedlinePlus, ASMBS and Academy of Nutrition and Dietetics guidance, and published peer-reviewed research. Each content page lists its sources.
• We show the formula. Where a number comes from an equation, we print the equation. You should be able to check our arithmetic, and on the how it works page you can.
• Estimates are labelled as estimates. BMR formulas are accurate to roughly 10% for most people and worse at the extremes of body composition. We say so rather than presenting a calculated figure as a measurement.
• Pages carry a review date and a review status. Every content page shows when it was last reviewed and whether a dietitian reviewed it.
• Review is scoped. Our dietitian reviews dietary guidance. They do not review, and are not represented as reviewing, surgical or medication management.
• We correct errors. If something here is wrong, tell us and we will fix it.

How this site is funded

• Advertising. This site displays third-party ads. Advertisers have no input into our content and no advance sight of it.
• Affiliate links. Some product links — protein supplements, for instance — are Amazon affiliate links, and we may earn a small commission if you buy through one, at no additional cost to you. They appear only where the product is genuinely relevant, and a commission never determines what we recommend.
• No industry funding. We accept no money, product or sponsored content from supplement brands, surgical practices or pharmaceutical companies.

Our calculator and your data

The calculator runs entirely in your browser. Your height, weight, age, sex and activity level are used to do the arithmetic on your own device and are never transmitted to us, never stored and never logged. Closing the page discards them. It produces a general estimate, not a personalised nutrition prescription, and it cannot account for pregnancy, growth years, kidney or liver disease, or a history of disordered eating.

Contact and corrections

Corrections are the most useful message we receive. See our contact page.