Medical emergency? Call your local emergency number
First aid guides

Menu

GeoMed · Medical Calculators

Medical Calculators

Type your numbers and get the answer straight away, with what it means and what to do next. Everything is worked out in your browser: nothing you enter is sent to us or stored.

  • Instant answers as you type
  • Private: nothing is saved
  • Ranges from WHO, AHA and other guidelines
Most used
Everyone

BMI Calculator

Body mass index (BMI) compares your weight with your height. Enter your measurements in the units you know to see your BMI, where it falls on the World Health Organization scale and the weight range that counts as healthy for your height.

Open calculator

For everyone

Period & ovulation
Everyone

Menstrual Cycle Calculator

Enter the first day of your last period and how long your cycle usually lasts. The calculator predicts your next periods, your most fertile days and, if you could be pregnant, an estimated due date.

Instant answer Free
Vital signs
Everyone

Vital Signs Checker

Enter any vital signs you have measured. Each one is compared with the normal range for the person's age and marked normal, low or high, with what to do next. Adults also get a NEWS2 early-warning score.

Instant answer Free

For students & clinicians

Dosage
Students & clinicians

Drug Dosage Calculator

Weight-based dose arithmetic for children and adults: the dose in milligrams, the volume of liquid to give, daily totals and maximum-dose checks, plus body surface area, ideal body weight, kidney function and infusion rates.

Instant answer Free
Urinalysis
Students & clinicians

Urinalysis Interpreter

Choose the results from a urine dipstick, and from microscopy if you have it. Every abnormal finding is explained, and findings that belong together (for example nitrite with leukocytes) are combined into a short interpretation.

Instant answer Free
Lab results
Students & clinicians

Laboratory Results Interpreter

Type in the results from a lab report, as many or as few as you have. Each one is compared with a typical adult reference range and explained in plain words. eGFR, corrected calcium, anion gap and non-HDL cholesterol are worked out for you.

Instant answer Free
These calculators are for education. They cannot examine you or know your history. If a result worries you, speak to a health professional. In an emergency, call your local emergency number.