About Health-calc.com

Ownership and background for this site.

On this site you will find calculators and utilities related to health, exercise and diet. All utilities on this site are well-proven and scientifically based tools and scientific references are provided where relevant. 

The utilities are intended for health professionals as well as for private individuals. Morten Zacho

Health-calc.com is owned and developed by exercise physiologist Morten Zacho (M.Sc.). Morten has previously worked as a researcher at the internationally recognized research centres "Copenhagen Muscle Research Centre" and "Centre for Physical Activity Research". Currently Morten is a teaching associate professor at the Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark.

Morten has also worked within the areas of coaching elite athletes, army exercise training, developing "Exercise on prescription" programmes. The basis for selecting and developing the utilities on this site has been the combination of research and practical experience. 

Health-calc.com started in January 2006 and is (as everything else on the net) under constant development.

If you have any questions or suggestions, please send an email to: This email address is being protected from spambots. You need JavaScript enabled to view it.

Thanks for stopping by ...

Follow us on Facebook



#15 Manzel 2020-12-20 00:47
Greetings, Morten. Just thought I should let you know that the comments section on the "Waist to height ratio" page is filling up with people posting about web pages for credit repair, house cleaners and the usual pornographic stuff. I know it's a burdensome task but perhaps it's time for someone to moderate these comments before they get posted. I like the site, by the way and especially like that metric measurements are catered for as well as imperial. Good work. Cheers, Manzel. Sanctuary Point, Australia.
#14 Morten Zacho 2020-11-10 14:49
Just to let everybody know, that the comment field is working again.
#13 Nathan 2018-05-06 07:23
Love this calculator but it has stopped working. All you get when you try to move the dials is "NaN"
#12 Beth 2013-07-25 18:55
What is the name of the iphone app that gives all the weight, BMI, measurements? Thanks!
#11 Coach V 2013-06-10 15:18
I use your app for my PE classes. I love it. I would like to see you add curl up, pull-up, trunk lift, shoulder stretch and flexed arm hang. If it is possible to add these it would be fabulous.
#10 Morten Z 2013-04-30 22:05
Chris -> I see your point, but for this category of estimation there are already many uncertainties as we are not really measuering anything. We could make it more accurate by asking for a VO2max value, heart rate, maximal heart rate and other measures, but then it wouldn't be easy to use at all. So by asking for a 10 minute setting we feel that it is a fair balance between ease of use and precision. Also, with a 10 minute dial you can maximally be 5 minutes off ;-)
#9 Chris 2013-04-26 18:27
Hi Morten,

I really like the design of your calculators and the ease of obtaining a result.

One question though regarding the advanced energy expenditure calculator. It is described as "very precise", but the increments available are only in 10 minute segments.

So, a 10 minute change in intense activity for example is for me about 250 calories or roughly 10% of my daily calorie allowance.

I guess there is a trade-off between usability and precision, but does this make for a "very precise" calculator?


#8 Morten 2012-04-25 13:53
You probably entered your height in meters whereas it should be entered in cm.
175 cm that is and not 1.75 cm ;-)

Add comment

Comments can not be used for advertising