We don't collect your answers. They stay in your browser, on your device.
What this calculator handles
To work out your calorie target it asks for things like your age, sex, weight, body-fat percentage, activity, diet, training, goal, and optionally your sleep and stress. It also asks whether anything on the health check applies to you. Some of this is health information, so we treat it carefully.
Where your answers go
Nowhere. The calculation runs in your browser. There are no accounts, and your answers are not sent to a server by this site.
To let you carry on later, the site saves a few things in your browser's local storage, on this device only:
- tdee-calculator:draft:v1: Your answers to the questions, so you can come back and carry on
- tdee-calculator:screening:v1: That you saw the health check, and which items you ticked
- theme: Your light or dark theme choice, if you picked one
You can remove all of it at any time with Start over on the results page, or by clearing this site's data in your browser.
Share links
The Copy link button puts your answers into the link itself, after the “#”. Browsers do not send that part of an address to a website, so it does not reach our server. Anyone you give the link to can see the answers inside it, and a messaging app or email service may keep a copy of the link. Share it only with people you trust.
Cookies, analytics and third parties
- No cookies are set by this site.
- No analytics or tracking tools are used at the moment.
- No advertising, and no data is sold or shared.
- Fonts are served from this site, so your browser does not contact a font provider.
If privacy-friendly, cookie-free analytics are added in future, this page will say so before they are switched on.
Hosting
Like any website, the company that hosts it receives your IP address and basic technical details (such as your browser type) when a page loads, and may keep them in short-lived logs for security and to keep the site running. That information does not include your answers.
Your control
Because your answers stay on your device, you stay in control of them: change them in the questions, clear them with Start over, or clear your browser's site data. There is no copy on a server for us to correct or delete.
Young people
This calculator is made for adults. If you are under 18, please talk to a doctor, dietitian or coach before changing how you eat.
Changes
If how the site handles data changes, this page will be updated and the date at the top will change.