Nutrition calculators,
backed by real
articles

All nutrition calculators

Every calculator below opens as a working tool — tap a card to try it.

Why nutrition calculators matter

Formula transparency

Every calculator shows its formula and a worked example, not just a black-box number.

A real article, not a tooltip

Each calculator links to a full article on why that number matters and how to act on it safely.

No clutter, fast pages

A clean, distraction-free design that works well on any device.

Nutrition calculators

All 6 calculators, listed one by one. Open any calculator directly, or read the full article underneath it first.

/ /

Other nutrition calculators

/ /

· Reviewed for accuracy against published nutrition guidance

Frequently asked questions

Common questions about Sweet Calculator's nutrition tools and articles.

Are these nutrition calculators medically accurate?

Every calculator uses published, widely cited formulas (such as Mifflin-St Jeor for energy needs), but results are estimates. They're meant to inform, not replace, advice from a qualified doctor or registered dietitian.

Is Sweet Calculator free to use?

Yes. Every calculator and every article on the site is free, with no account required.

Why do all calculators use metric units?

Metric keeps every formula consistent and easy to verify. If you use imperial units, convert with: kg = lb ÷ 2.205, and cm = in × 2.54.

What's the difference between the calculator page and the article page?

The calculator page gives you a working number plus the formula behind it. The "View about" article page goes deeper — why that number matters day to day, how it fits into overall nutrition, and safety tips specific to that calculator.

How often is content reviewed?

Formulas and articles are checked periodically against current guidance from bodies like the CDC, WHO, NIH, and IOM.

About Sweet Calculator

Why we narrowed everything down to nutrition, and what we're trying to do differently.

Sweet Calculator was built on a simple idea: nutrition calculators should show their work. Most calculator sites give you a number and nothing else — no formula, no explanation, and no honest context for whether it even applies to you.

We deliberately focused this site on one category — nutrition — rather than spreading thin across dozens of unrelated tools. Calories, energy expenditure, macronutrients, protein, fat, and carbohydrates all interact with one another, so it makes sense to understand them together, in one place, with one consistent standard of writing.

Every calculator here pairs its result with a full article: not a two-line tooltip, but a genuine explanation of why that number matters day to day, how it fits into the bigger nutritional picture, and what to watch out for. We'd rather you understand your result than just stare at it.

We are not a medical provider. Every calculator here produces an estimate for educational purposes, and nothing on this site should replace advice from a qualified doctor or registered dietitian.

6Working calculators
6In-depth articles
100%Free, no account

Have a suggestion or spotted something inaccurate? Send us a review — it goes straight to our inbox.

Terms & Conditions

Please read these terms before using Sweet Calculator's tools and articles.

1. Educational use only

Every calculator on this site produces a general estimate for educational purposes. Results are not medical advice, a diagnosis, or a treatment plan, and should not replace guidance from a qualified doctor or registered dietitian.

2. No warranty

We do our best to keep formulas accurate and up to date, but the calculators and articles are provided "as is," without warranty of any kind, express or implied.

3. Your responsibility

You're responsible for how you use the information on this site. Always consult a qualified professional before making significant changes to your diet, exercise, or health routine, especially if you have an existing medical condition.

4. Reviews and messages

If you send us a review or message through the About page, you agree that we may read and respond to it. We won't share your message with third parties beyond what's needed to reply to you.

5. Changes to these terms

We may update these terms from time to time. Continued use of the site after changes means you accept the updated terms.

Privacy Policy

What we collect, why, and how it's handled.

1. What we collect

Sweet Calculator's calculators run entirely in your browser — the numbers you enter (age, weight, height, activity level, etc.) are never sent to or stored on our servers. If you use the review form on the About page, we collect the name, email, and message you choose to submit, purely so we can read and reply to you.

2. Cookies and tracking

We don't use tracking cookies or third-party analytics to profile individual visitors. Basic, aggregate technical information (like page load errors) may be logged by our hosting provider for reliability purposes only.

3. How review messages are used

Messages sent through the review form are delivered to our inbox solely to respond to your feedback or question. We don't sell, rent, or share this information with third parties.

4. Data retention

We keep review messages only as long as needed to address them. Since calculator inputs never leave your device, there's nothing for us to retain from your calculator use.

5. Changes to this policy

We may update this policy from time to time. Continued use of the site after changes means you accept the updated policy.

Medical Disclaimer

Please read this before relying on any calculator result.

1. Not medical advice

Sweet Calculator's tools provide general estimates for educational purposes only. Nothing on this site is intended to diagnose, treat, cure, or prevent any medical condition, and none of it should replace advice from a qualified doctor or registered dietitian.

2. Individual results vary

Formulas like BMR, TDEE, and macro splits are population-level estimates. Your actual needs can differ based on muscle mass, metabolic health, medications, genetics, and other factors a calculator can't account for.

3. Existing health conditions

If you have a medical condition, are pregnant or breastfeeding, or are recovering from illness or surgery, talk to a healthcare professional before making changes to your diet or activity based on these results.

4. Emergencies

This site is not equipped to handle medical emergencies. If you're experiencing a health emergency, contact your local emergency services immediately.