Health and Fitness Calculators
Check BMI, energy needs, body fat, heart rate zones and standard drinks using Australian units.
- BMI Calculator
Calculates body mass index for adults using metric units.
- BMR Calculator
Estimates the energy your body uses at rest, in kilojoules and calories.
- Daily Kilojoule Needs Calculator
Estimates daily energy needs in kilojoules based on activity level.
- Body Fat Calculator
Estimates body fat percentage using the US Navy tape-measure method.
- Ideal Weight Calculator
Gives a healthy weight range for your height.
- Water Intake Calculator
Estimates daily fluid needs from body weight and exercise.
- Pregnancy Due Date Calculator
Estimates a due date from the first day of the last menstrual period.
- Heart Rate Zone Calculator
Calculates heart rate training zones using the Karvonen method.
- Standard Drinks Calculator
Calculates Australian standard drinks from volume and alcohol percentage.
- Running Pace Calculator
Converts a running time and distance into pace and speed.
About these calculators
Australian nutrition labels use kilojoules, alcohol is measured in standard drinks of 10 grams, and health guidance comes from sources such as the NHMRC and Healthdirect. These calculators use common, published formulas as a starting point.
Questions
- Are these calculators medical advice?
- No. They provide general information. See your GP or visit healthdirect.gov.au for personal advice.
- Do they work for children?
- No. Adult formulas are used throughout. Children’s growth is assessed differently.
- Where do the formulas come from?
- Each calculator page names the formula used, such as Mifflin-St Jeor for BMR or the US Navy method for body fat.
Guides
- How the BMI Calculator Works (With a Worked Example)
Calculates body mass index for adults using metric units. Includes the formula, a worked example with Australian figures and tips.
- Getting the Most From a BMI Calculator: Tips and Common Errors
Common mistakes when working out BMI in Australia, and how to get a result you can rely on.
- BMR Calculator: Formula, Example and What the Result Means
Estimates the energy your body uses at rest, in kilojoules and calories. Includes the formula, a worked example with Australian figures and tips.
- BMR: What to Check Before You Trust the Number
Common mistakes when working out BMR in Australia, and how to get a result you can rely on.
- Using a Daily Kilojoule Needs Calculator in Australia: A Step-by-Step Guide
Estimates daily energy needs in kilojoules based on activity level. Includes the formula, a worked example with Australian figures and tips.
- Common Daily Kilojoule Needs Mistakes (and a Better Way)
Common mistakes when working out daily kilojoule needs in Australia, and how to get a result you can rely on.
- Body Fat Calculator Explained for Australians
Estimates body fat percentage using the US Navy tape-measure method. Includes the formula, a worked example with Australian figures and tips.
- Body Fat Mistakes Australians Make and How to Avoid Them
Common mistakes when working out body fat in Australia, and how to get a result you can rely on.
- How the Ideal Weight Calculator Works (With a Worked Example)
Gives a healthy weight range for your height. Includes the formula, a worked example with Australian figures and tips.
- Getting the Most From a Ideal Weight Calculator: Tips and Common Errors
Common mistakes when working out ideal weight in Australia, and how to get a result you can rely on.
- Water Intake Calculator: Formula, Example and What the Result Means
Estimates daily fluid needs from body weight and exercise. Includes the formula, a worked example with Australian figures and tips.
- Water Intake: What to Check Before You Trust the Number
Common mistakes when working out water intake in Australia, and how to get a result you can rely on.
- Using a Pregnancy Due Date Calculator in Australia: A Step-by-Step Guide
Estimates a due date from the first day of the last menstrual period. Includes the formula, a worked example with Australian figures and tips.
- Common Pregnancy Due Date Mistakes (and a Better Way)
Common mistakes when working out pregnancy due date in Australia, and how to get a result you can rely on.
- Heart Rate Zone Calculator Explained for Australians
Calculates heart rate training zones using the Karvonen method. Includes the formula, a worked example with Australian figures and tips.
- Heart Rate Zone Mistakes Australians Make and How to Avoid Them
Common mistakes when working out heart rate zone in Australia, and how to get a result you can rely on.
- How the Standard Drinks Calculator Works (With a Worked Example)
Calculates Australian standard drinks from volume and alcohol percentage. Includes the formula, a worked example with Australian figures and tips.
- Getting the Most From a Standard Drinks Calculator: Tips and Common Errors
Common mistakes when working out standard drinks in Australia, and how to get a result you can rely on.
- Running Pace Calculator: Formula, Example and What the Result Means
Converts a running time and distance into pace and speed. Includes the formula, a worked example with Australian figures and tips.
- Running Pace: What to Check Before You Trust the Number
Common mistakes when working out running pace in Australia, and how to get a result you can rely on.