The Fitness Calculator

More than six million individuals all over the world have tried our Fitness Calculator. American health authorities recommend our calculator over other non-exercise models to estimate how fit you really are. You should also test your fitness age by clicking the image below, but let us first explain what makes our calculator so special and popular.

  1. The Fitness Calculator is accurate for most people
  2. The Fitness Calculator reveals risk of disease
  3. The Fitness Calculator is for the whole world

fitness calculator

The Fitness Calculator estimates your fitness age measured as maximum oxygen uptake (VO2max). VO2max is the most precise measure of overall cardiovascular fitness. You can also find your own risk of dying early from cardiovascular disease, and we give you some tips on how you can reduce the risk. If you want to, you can contribute to our research by completing an extended questionnaire.

Estimates fitness accurately

In 2007 and 2008 several thousand Norwegians tested their VO2max on a treadmill in The HUNT Fitness Study. They also answered several questions and had a complete health check-up as part of the third HUNT study (HUNT3).

Therefore, we could establish the most important factors for fitness among healthy women and men. These facors – namely age, waist circumference or body mass index (BMI), leisure-time physical activity and resting heart rate – are those included in the algoritm that constitutes our Fitness Calculator.

Read the full research article:
Estimating V˙O2peak from a Nonexercise Prediction Model: The HUNT Study, Norway

Predicts your risk

The next thing we did was to show that the fitness number estimated by the Fitness Calculator is of great importance for how long you can expect to live. That's why we now recommend every physician to use the calculator to identify patients with high risk of life style diseases and early death.

By use of the Fitness Calculator, we estimated fitness in 37,000 healthy individuals who participated in the HUNT1 study in the 1980s. We then followed them for 24 years and looked at health outcomes.

The risk of dying from cardiovascular disease was 21 % lower for each increase of 3.5 mL·kg-1·min-1, or 1 MET. This associations persisted after adjusting the analysis for confounding factors. The risk of dying from all causes during follow-up was also gradually reduced with better fitness.

Read the full research article:
A Simple Nonexercise Model of Cardiorespiratory Fitness Predicts Long-Term Mortality

All you need

Moreover, the number you get from the Fitness Calculator seems to be all you really need to estimate the risk of cardiovascular disease and premature death in presumably healthy individuals. Recently, we published data showing that the calculator estimates the risk about just as good on its own as when traditional risk factors for cardiovascular disease are included in the model.

In these analyses we included almost 40,000 participants from the HUNT study and followed them for up to 17 years. The results highlight that the Fitness Calculator can be an extremely simple and useful tool in prevention strategies against lifestyle diseases.

Read the full research article:
Prediction of Cardiovascular Mortality by Estimated Cardiorespiratory Fitness Independent of Traditional Risk Factors: The HUNT Study

Unique database for the whole world

Answers from more than 730,000 healthy persons have made it possible for us to create a database on the fitness levels for people in different countries and on all continents. The database could – in combination with the Fitness Calculator – potentially be used by health services in all countries to identify population groups and individual patients with especially high risk of cardiovascular disease and other non-communicable diseases.

Some results from the database:

  • The average man in the world has a fitness number of 50.4
  • The average woman in the world has a fitness number of 40.6
  • The average man sits 7.2 hours a day
  • The average woman sits 6.8 hours a day
  • Regular physical activity eliminates the increased risk associated with a sedentary lifestyle: Even among those who reported to sit a lot, individuals who reported to exercise according to guidelines had significantly higher estimated VO2max than individuals who did not.
  • VO2max is lower the older you are.

Read the full article:
Global Fitness Levels: Findings From a Web-Based Surveillance Report

Frequently Asked Questions

How do I measure my resting heart rate?

To measure your resting heart rate, you can either use a heart rate monitor and sit quietly for ten minutes, and use the lowest pulse measurement you get. Or you can simply sit quietly for ten minutes, then measure your pulse by counting it for 30 seconds and multiplying by two.

How do I measure my waist circumference?

To measure your waistline, use a measuring tape around your waist at the level of your navel.

What does my fitness number tell me?

Physical fitness is very important for longevity and good health. The maximal oxygen uptake (fitness) is the most precise measure of overall cardiovascular fitness. Read more about the importance of good fitness here, and find out what are the normal values for people your own age.

How can I improve my results the next time I try the Fitness Calculator?

Here we have gathered some general exercise advice. You could also try our 7 week fitness program, which is a fast and effective way to get fit.

What do we ask for in the Fitness Calculator, and why?

Where are you from? Ethnicity? Highest level of education?

We use this information only for research purposes, so we can compare fitness levels in different coutries, and among different ethnicities. Nothing of this is used in the algorithm.

Gender, age, height, weight?

Women's fitness values tend to be about 20 % lower than men's, so gender matters a lot. Age is also important, and the older you are, the lower the oxygen uptake. We use height and weight to calculate body mass index (BMI), which also goes into the algorithm.

What’s your maximum heart rate?

Maximum heart rate is a common means of denoting intensity for endurance training. If you don't know your maximum heart rate, our HRmax Calculator (integrated in the Fitness Calculator) can estimate it for you.

How often, how long, and how intense is your exercise?

All these factors matter in a balanced way, but exercise intensity is the most indicative of fitness.

What’s your waistline? What’s your resting pulse?

Both waist circumference and BMI can be used in the algoritm. The Fitness Calculator will be about just as accurate independently of which body composition measurement is used. 

A low resting heart rate is a sign of a fit heart, and world-class endurance athletes use it to see if they’re ready for their next exercise session.

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NTNU, Fakultet for medisin og helsevitenskap
Institutt for sirkulasjon og bildediagnostikk
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