A calculator that shows its working.

Why this site exists

There is no shortage of TDEE calculators. Nearly all of them share the same two problems. They present an estimate as though it were a measurement, and they will happily tell a small woman to eat 900 calories a day if the arithmetic points there.

Neither of those is acceptable in a tool people use to decide what to eat. So TDEENet does three things differently. It runs your numbers through every published equation it knows and shows you the spread, because that spread is the honest picture of the uncertainty. It prints an error range next to the headline figure. And it refuses to display an intake below the levels that clinical guidance treats as a floor.

Who writes this

Every page is written by [author name], [credential], and reviewed for clinical accuracy by [reviewer name], [credential]. Review dates appear at the bottom of each page. When a page has not been checked in twelve months, we either recheck it or take it down.

If you find an error, factual or arithmetic, please tell us. Corrections get made and logged.

How the calculator works

It is a static page. There is no back end, no database and no account system. The maths runs in JavaScript on your own device, which is why results appear instantly and why nothing you enter is transmitted anywhere. Close the tab and it is gone. The privacy policy spells out the small amount of analytics the site does collect.

The equations used are Mifflin-St Jeor, the revised Harris-Benedict, Katch-McArdle and Cunningham. Which one leads depends on whether you supply a body fat percentage. Sources for all of them are listed on the homepage.

How it is funded

[Describe your funding model here: advertising, affiliate links, or personal funding. State it plainly. If you run ads, say so, and say that ad placement never influences the content. If you use affiliate links, say where they appear and that they cost the reader nothing extra.]

Whatever the model, one rule holds: nobody pays to change what the calculator says or what the articles recommend.

What this site will not do

• Show a calorie target below 1,200 for women or 1,500 for men.
• Produce results for anyone under 18.
• Suggest a weight-loss target to someone whose BMI is already below the healthy range.
• Sell, share or store the numbers you type into the calculator.
• Present an estimate as a diagnosis, or stand in for a doctor or a registered dietitian.