Calculate your BMI: when is it time to take action?

What is BMI?

BMI stands for Body Mass Index — a simple calculation that relates your weight to your height. The formula:

BMI = weight (kg) / (height (m) x height (m))

For example: 90 kg at 1.75 m = 90 / (1.75 x 1.75) = 29.4

BMI categories

When is action needed?

BMI isn't perfect — it doesn't account for muscle mass, bone density or fat distribution. But it provides a useful initial indication.

BMI 25-29.9 (overweight)

At this level, lifestyle adjustments can often be enough: more exercise, healthier eating, better sleep. A dietitian can help.

BMI 30+ (obesity)

At a BMI of 30 or above, a personalised weight management programme may be worthwhile. This is the point where medically supervised support becomes more effective than dieting alone.

What are your options at BMI 30+?

Lifestyle

Nutrition, exercise and behavioural change remain the foundation. But at a BMI of 30+, this is often not enough on its own.

Branded products

There are registered branded products available through your GP. Cost: roughly €150-500 per month, depending on product and dose. Often a standard dosage that isn't tailored to your body.

Compounding, arranged independently

A personalised programme through a licensed compounding pharmacy, arranged directly with a doctor and pharmacy — not through Magistra. The dosage can be tailored to your BMI, health and goals. Pricing is set independently by the prescribing doctor and pharmacy — ask for a quote before committing.

What Magistra actually offers

Magistra does not run a questionnaire and does not calculate or receive your BMI — there is no Magistra intake to share it with. Check our free predictor tool for a personalised view of expected side effects and outcomes to discuss with your own doctor.

See your personalised risk profile: magistra.health/en/predictor

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