Question 1

Are these calculators free?

Accepted Answer

Yes. All calculators are 100% free with no account required.

Question 2

How accurate are the results?

Accepted Answer

Our calculators use validated formulas (Mifflin-St Jeor for BMR, Navy Method for body fat, Devine/Robinson/Miller for ideal weight). Results are estimates and should not replace medical advice.

Question 3

Do you store my data?

Accepted Answer

No. All calculations happen in your browser. We never transmit or store your personal measurements.

Question 4

What units do you support?

Accepted Answer

All calculators support both metric (kg, cm) and imperial (lbs, ft/in) units with automatic conversion.

Question 5

What is BMI?

Accepted Answer

BMI (Body Mass Index) is a screening tool that estimates whether your weight is in a healthy range for your height. A BMI under 18.5 is underweight, 18.5–24.9 is normal, 25–29.9 is overweight, and 30+ is obese.

Question 6

What is BMR?

Accepted Answer

BMR (Basal Metabolic Rate) is the number of calories your body burns at rest to maintain basic functions. TDEE (Total Daily Energy Expenditure) adds your activity level on top.

Question 7

How is body fat percentage calculated?

Accepted Answer

We use the US Navy circumference method, which requires waist, neck, and (for women) hip measurements along with height. It is an estimate; DEXA scans are more accurate.

Question 8

What ideal weight formula should I use?

Accepted Answer

We provide Devine, Robinson, and Miller formulas — all are estimates. A healthy weight range is more useful than a single ideal number. Consult your doctor for personalised advice.

Frequently Asked Questions

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Frequently Asked Questions

What calculators are available on this site?

Are these calculators free to use?

How accurate are these calculators?

Is my data private?

Can I switch between metric and imperial units?

Can I download my results?

How do I use the calculators?

What if my results seem wrong?

When was the data last updated?

Is BMI accurate for athletes and bodybuilders?

What's the difference between BMR and TDEE?

Do you provide professional health or medical advice?

How do I report errors or bugs?

Who made this site?

Are my calculator inputs saved on your servers?

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