Calorie Check exists to answer one very specific, very common question as accurately and honestly as free web tools reasonably can: "how many calories is this, actually?" — whether that's a daily target based on your body and activity level, or a real plate of food at a restaurant table.
Why We Built This
Most people who search for a calorie calculator are not looking for a research project. They want a number they can act on today — a daily calorie target before they start a diet, a rough macro split before they go shopping, or a nutrition estimate before they order at a restaurant. The problem is that a huge amount of what ranks for these searches is either an oversimplified widget with no explanation of what the number means, or a generic food database that treats every restaurant meal like a lab sample rather than a real plate of food someone is about to eat.
We built this site to sit in the gap between those two extremes: calculators that are genuinely fast and easy to use, but that also explain their method, state their assumptions, and — where the numbers could be misleading if taken at face value — say so plainly.
What Makes Our Approach Different
Three things guide every calculator and every article we publish:
- Named, checkable formulas. We don't invent proprietary equations. Our BMR and TDEE calculators use the Mifflin–St Jeor equation; our BMI tool uses the standard WHO weight classification bands; our macro splits are based on widely used gram-per-kilogram protein targets from sports nutrition guidance. Every calculator page tells you exactly which method is running behind the scenes.
- Real portions, not lab averages. Our restaurant calculators are built around how people actually order — a chosen cut of meat, a couple of sides, a sauce, a drink — rather than a single "meal" entry that hides what's actually on the plate. You build the plate; the tool totals it.
- Honest uncertainty. Formulas built on population averages are estimates, not diagnoses. Where a result — like an aggressive calorie deficit — falls outside commonly recommended, sustainable ranges, the calculator flags it instead of quietly returning a number that might not be a good idea to follow.
How the Calculators Are Built
Every calculator runs entirely in your browser using JavaScript — there's no server round-trip, no account, and nothing you type is transmitted or stored anywhere. That's partly a privacy decision (see our Privacy Policy for the full detail) and partly a speed one: results appear instantly as you submit the form, with no loading spinner and no dependency on a third-party API that could go down or change its terms.
For general calculators — BMR, TDEE, calorie deficit/surplus, macros, and BMI — the underlying formulas are published, peer-reviewed or widely adopted equations used across clinical and sports-nutrition contexts. We link to the specific equation on each calculator's page rather than asking you to take our word for it.
For restaurant-specific calculators, we compile per-item nutrition estimates (calories, fat, saturated fat, carbohydrates, sugars, fibre, protein and salt) for menu categories at named venues, modelled on typical published portion sizes and standard nutrition-composition data. These tools are independent projects: they are not affiliated with, endorsed by, or sponsored by the restaurant brands they reference, and the figures are estimates for general guidance rather than a substitute for the operator's own official nutrition information — which we always encourage you to check directly, particularly if you manage a food allergy or medical condition. Full detail on how each dataset is compiled and kept current lives on our Editorial Methodology page.
What We Are Not
We are not a medical or dietetic practice, and nothing on this site is individual medical advice. Calorie and nutrient needs vary with age, medical history, medication, activity, hormonal factors, and genetics — variables no web calculator can fully account for. If you have a diagnosed health condition, are pregnant or breastfeeding, are supporting disordered eating recovery, or are otherwise in a situation where general calorie guidance could be inappropriate, please speak with a doctor, registered dietitian, or other qualified healthcare professional before using our numbers to make decisions.
Keeping Things Current
Menus change, portion sizes shift, and recipes get reformulated. We review restaurant datasets periodically and update the "last updated" date shown on each calculator page when we do. If you spot something that looks out of date or incorrect, please get in touch — we would rather hear about it and fix it than leave a stale number live.
Get in Touch
Questions, corrections, or a calculator you'd like to see added? Visit our Contact page — we read every message. Thanks for using Calorie Check.