Free health and fitness calculators to help you understand your numbers. Estimate calories with BMR and TDEE, set a sensible calorie deficit and macros, follow a pregnancy week by week, plan sleep and train in the right heart rate zone. The tools are for general information and do not replace advice from your GP or midwife.
In This Guide
Quick picks
Not sure where to start? These are the tools people use most in this category.
| I want to | Use this tool |
|---|---|
| Daily calorie needs | TDEE Calculator |
| Resting calorie burn | BMR Calculator |
Body weight and calories
3Energy needs and balanced eating.
Frequently asked questions
Are these calculators medical advice?
No. They give general estimates. Speak to your GP, midwife or a registered dietitian about your own health.
How accurate is a BMR estimate?
Formulas such as Mifflin-St Jeor are good averages, but individual results can differ by around 10%, so use them as a starting point.
Is a calorie deficit safe?
A modest deficit suits most adults, but very low calorie diets should only be followed with medical supervision.
Do you store my health details?
No. Everything you enter stays in your browser.
How we build and check these tools
Every tool is built by hand by the Tools Veria Editorial Team, tested with worked examples and checked against official guidance. Read our editorial policy to see how we review figures when rules change. Key sources for this category:
Explore more categories
Browse all tools or read our practical guides.