Smart Tools for Health & Science

Free medical calculators and measurement converters, built on the same evidence-based standards as the BioMind AI Academy — every formula shown, every source named.

🔒 Private by design — everything is calculated in your browser. Nothing you type is stored or sent anywhere.

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📏 Universal Measurement Converter

The units used in medicine and science, converted instantly — in both directions.

⚖️ BMI & Healthy Weight Range

Body Mass Index shows whether a weight is in the healthy range for a person's height (adults 20+).

Weight (kg)

Height (cm)

How it works: BMI = weight (kg) ÷ height (m)². Categories (CDC): underweight below 18.5 · healthy 18.5–24.9 · overweight 25.0–29.9 · obesity 30 and above. Healthy weight range = 18.5 × h² to 24.9 × h². BMI is a screening measure — it does not measure body fat directly and may misclassify very muscular people. Source: CDC, Adult BMI Categories.

📚 Learn more: the academy's lesson “How to Lose Weight — and Keep It Off”.

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🔥 Calorie & Protein Needs

Estimate how many calories your body burns each day, a sensible target for your goal, and how much protein to aim for.

Sex

Age (years)

Weight (kg)

Height (cm)

Activity level

Goal

How it works: resting burn (BMR) uses the Mifflin–St Jeor equation — women: 10W + 6.25H − 5A − 161; men: 10W + 6.25H − 5A + 5 (W = kg, H = cm, A = age). Daily burn (TDEE) = BMR × activity factor. Losing ≈ 500 kcal/day below TDEE gives roughly 0.5 kg (1 lb) per week. Protein: the NIH recommended allowance is 0.8 g per kg body weight; during weight loss, 1.2–1.6 g/kg helps protect muscle. Sources: Mifflin et al. (1990); NIH Dietary Reference Intakes; CDC weight-loss guidance.

📚 Learn more: the academy's course Healthy Eating & Weight.

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💧 Daily Water Intake

How much water to drink each day, based on your body weight and activity.

Weight (kg)

Exercise today (minutes)

Climate

How it works: a widely used clinical guide is 30–35 mL of water per kg of body weight per day, plus roughly 350–500 mL for every 30 minutes of exercise. For context, the National Academies set total water adequate intakes at about 2.7 L/day for women and 3.7 L/day for men — that total includes water from food, which provides roughly a fifth. Thirst, pale-yellow urine, and your clinician's advice (especially with kidney or heart conditions) come first. Source: National Academies Dietary Reference Intakes.

📚 Learn more: the academy's lesson “The Healthy Plate”.

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🩸 A1C ↔ Average Glucose (eAG)

A1C shows your average blood sugar over about 3 months. Convert between A1C (%) and estimated average glucose.

I know my…

A1C (%)

How it works: eAG (mg/dL) = 28.7 × A1C − 46.7; eAG (mmol/L) = 1.59 × A1C − 2.59. Ranges (ADA): A1C below 5.7% is normal · 5.7–6.4% prediabetes · 6.5% and above is in the diabetes range. Source: American Diabetes Association (ADAG study).

📚 Learn more: Dr. Mariam's book and lessons on diabetes at the BioMind AI Academy.

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🍬 Blood Sugar Converter — and What the Number Means

Convert a blood sugar (glucose) result between mg/dL and mmol/L, and see where it falls.

Glucose value

Unit

When was it measured?

How it works: mmol/L = mg/dL × 0.0555. Reference ranges (ADA): fasting — normal 70–99 · prediabetes 100–125 · diabetes range 126+ mg/dL; two hours after meals — normal below 140 · prediabetes 140–199 · diabetes range 200+. A diagnosis always needs a repeat laboratory test, not a single reading. Source: American Diabetes Association, Standards of Care.

📚 Learn more: the academy's lessons on diabetes and metabolism.