Free toolBMI Calculator
BMI Calculator
for Teenagers
Get your BMI, personalised daily calorie target, and a realistic timeline to your goal weight — all in 30 seconds.
- ✓Uses Mifflin-St Jeor equation (gold standard)
- ✓Age-appropriate for teen girls
- ✓Calculates BMR, TDEE, and daily calories
- ✓Shows your ideal healthy weight range
- ✓Free — no account needed to see results
Free BMI Calculator
Personalised in 30 seconds
Common questions
Is BMI accurate for teenagers?+
BMI is a useful screening tool but has limitations for teenagers, who are still growing. Use it alongside energy level, fitness, and doctor guidance.
What is a healthy BMI for teen girls?+
For teenagers, healthy BMI ranges vary by age and sex. Generally 18.5–24.9 is considered healthy, but this varies during puberty.
How many calories should a teen eat?+
Most teenage girls need 1,600–2,400 kcal/day depending on activity level. Our calculator gives a personalised recommendation.
Is this calculator safe for teens?+
Yes. We use the Mifflin-St Jeor equation and never recommend below 1,200 kcal/day. Our guidance is age-appropriate and body-positive.
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