1 RM Print E-mail
The 1 RM calculator allows you to calculator your maximal strength in a given exercise based on the number of repetitions you can can perform with a submaximal load.

Instructions:
1. Pick a weight you can maximally lift 2-12 times.
2. Lift the weight for as many repetitions possible and enter weight and number of repetitions.
3. The top panel shows the estimated RM-values. 1 RM is the maximal weight you can lift 1 time. 2 RM is the maximal weight that can be lifted 2 times, etc.

 

Background 

One RM is defined as the maximal weight that can be liftet once with good form in a given exercise. Two RM is tha maximal weight that can be lifted two times etc. By knowing the maximal weight you can lift a given number of repetitions, you can estimate the maximal weights that can be lifted any other number of repetitons (within limits).


References
Brzycki, M. Strength testing: Predicting a one-rep max from a reps-to-fatigue
Journal of Physical Education, Recreation and Dance 64 (1): 88-90, 1993.

Comments (6)add comment

zulu said:


the calculator is a bit iffy. Of course it can't really be a hundred percent correct but when you increase the reps, it get's ridicolous.
For example doing 12 repetitions on 70 kg, is not = 1RM 100.8

Think it is more safe if you do low rep excercises for maxium strength (like bench 3x4 etc, or stronglift 5x5)

But anyway, a great upload! I'm always cheering when I type in the reps and weight and see that my max has increased:)
October 04, 2011

sathish said:


i wish to copy this calculator . please help me
July 29, 2011

cricketislol said:


Stephen:it does not say "pick up a weight", it says"pick a wieght".Any exercise goes. if you can, say, lift 200 lbs. 4 times, put those numbers into the calculatorand it will tell you how many lbs. you can lift 1,2,3,5times and so on.
December 09, 2009

isha said:


hai.i wish to copy the calculators for thesis... how? tq
October 08, 2009

Stephen said:


I don't fully understand this test. I'm a cricket coach and I am using these tests on my (currently) woefully unfit cricketers.
When you say pick up a weight what exactly do you mean? Pick it up from the floor and shoulder press it? And should I have to change the weight depending on the existing strength of the cricketer?
I only want a minimum of equipment hence bleep test, cooper run, step test, pressup test, and body composition tests all working well.
Fantastic website by the way.
February 28, 2009

rudyrahman said:


im very appauled how the calculators work for me and my clients..i wish to copy the calculators to input it to my files..can i do that?
October 09, 2008

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