Free Health Calculators

Know your numbers.
Own your health.

Honest tools for real people. No jargon, no judgment — just the numbers that help you understand your body and take the next step.

2.1B Adults tracking health metrics
5 Free tools available now
60s To get your first number
Calculate my numbers →

BMI Calculator

Your Body Mass Index is a starting point — not a verdict. Tell us about you and we'll give you results calibrated to your actual biology.

yrs
ft
in
lbs
⚠️ Standard BMI is less accurate for wheelchair users and people with spinal cord injuries or limb differences, as it can underestimate body fat due to reduced muscle mass. Your result will include adjusted context and alternative measurements to consider.
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Your results will appear here.
We'll give you your number and honest context about what it actually means for you.

Your BMI
Underweight
<18.5
Normal
18.5–24.9
Overweight
25–29.9
Obese
30+

BMI doesn't measure body fat directly. It doesn't account for muscle mass, bone density, age, or ethnicity. Use it as one data point — not a final answer. Your healthcare provider can give you fuller context.

Next step → Now that you know your BMI, find out exactly how many calories your body burns daily. Try the TDEE Calculator
Save your results

Enter your email and we'll send you your numbers plus a reminder to recalculate in 6 weeks as your body changes.

✓ Saved! Check your inbox shortly.
All Tools

Five numbers that tell your story.

Each tool builds on the last. Start anywhere — but start.

⚖️
BMI Calculator
Your body mass index — the classic starting point with honest context about its limits.
Start here →
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TDEE Calculator
How many calories your body actually burns in a day — the number that makes or breaks any goal.
Calculate →
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Macro Calculator
Protein, carbs, and fat targets tailored to your goal — whether that's losing fat, building muscle, or maintaining.
Calculate →
📐
Body Fat Estimator
A measurement that goes beyond BMI — uses your body measurements to estimate body composition.
Estimate →
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Ideal Weight Range
Not one number — a realistic range based on your height, frame, and biology. Because health isn't a single target.
Find yours →
Why GetVitalNumbers Is Different

Numbers without context are just noise.

We tell you what the number means

Most calculators give you a result and stop. We explain what it actually means for your body, your goals, and your next decision — in plain language.

We're honest about limitations

BMI doesn't measure fat. TDEE is an estimate. We tell you this upfront — because a number you understand is more useful than a number you blindly trust.

No judgment, no pressure

You're here because you want to understand your body better. That's enough. No sales pitch, no shame, no "you should lose weight" — just the data you came for.