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Calculate your one-rep max

Gauge your current strength
with our fitness calculators!

Calculate Your One Rep Max!

Enter how much weight and reps you did for your last workout. It tells you what your approximate one rep max would be!

Before beginning any strength-training program, it is advisable that a lifter determine their one-repetition-maximum (1RM) to gauge their current strength level. Essentially the result of one-repetition-maximum testing will give a precise indication of how much weight one is capable of lifting for one repetition across a range of exercises, sport specific or otherwise.

Related Video Calculating your 1RM
Watch The Video - 03:56

Upon learning of their one-lift capacities, one can design their program around these maximal weights. For example, it might be suitable for power-training that 85% of a one repetition maximum is used as a training weight for the bench press, squat, and deadlift. For toning, or developing a defined body for the beach, 70%, or lower, might be more appropriate.

It Is Advisable That A Lifter Determine Their 1RM To Gauge Their Current Strength Level.
It Is Advisable That A Lifter Determine Their 1RM To Gauge Their Current Strength Level.

Calculate Your One-Rep Max (1RM)

Weight Lifted
Reps Done

= One-Rep Max

 95% 1 RM
 90% 1 RM
 85% 1 RM
 80% 1 RM
 75% 1 RM
 70% 1 RM
 65% 1 RM
 60% 1 RM
 55% 1 RM
 50% 1 RM

Fitness Calculators Main Page

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ImCollins

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ImCollins

This comes in very handy. It breaks down how much your actually putting into a rep and how much should be doing. This is great.

Dec 15, 2011 5:11am | report
UTTitan

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UTTitan

awesome video thanks for the new way to calculate this!

Jan 13, 2012 9:49am | report
goyettecj

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goyettecj

Aye mayn, yu tryn to build some muscle mayn?

Jan 27, 2012 8:00pm | report
ant88

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ant88

Good overview of how "one rep max" is used. This helps me with my work with workout tracker.

Feb 9, 2012 11:28am | report
budyali

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budyali

A great site. I am proud to join in here.
Unfortunately, my English is not good.
Some terms (such as: RM1 or rep) will not understand.
If the description given is very high.

Feb 16, 2012 5:20am | report
  • Body Stats
  • ht: 12'10"
  • wt: 154.54 lbs
  • bf: 7.0%
Kelgogi

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Kelgogi

I go to this every week. So much safer than doing 1 rep maxes.

Feb 23, 2012 12:51pm | report
want2behuge22

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want2behuge22

but u know what like it all depends i mean the calculator is pretty accurate but like some people are good at just doing one rep like some days i can barely do 295 more than 2 or 3 times and the calculator says my max is under 315 but when i try 315 i drive that **** up easy

Mar 26, 2012 6:03pm | report
charlie_g68

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charlie_g68

nice to know it's pretty accurate! thanks want2behuge22

Jul 8, 2012 5:47pm | report
skinnykid90

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skinnykid90

awesome. i was able to recreate my high school program for strength training with the percentages provided for any workout at any weight and it didn't take me all day to do the math! lol.

Apr 10, 2012 2:03pm | report
villagechick

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villagechick

I love this site. I learn so much. I can't wait to use this information!

Apr 12, 2012 8:33pm | report
BlackOrdinance

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BlackOrdinance

This sounds like a good deal. Been looking for something to break my max plateau. Getting started on the "Day 2" portion today.

Apr 18, 2012 8:16am | report
Poliana

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Poliana

thank you!

Article Rated:
Apr 30, 2012 9:01pm | report
bwilliams2020

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bwilliams2020

I love bodybuilding.com, Its the best. Thanks for being awesome.

Jun 15, 2012 9:27am | report
danfitness

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danfitness

I REALLY LIKE THIS. GREAT JOB BODYBUILDING.COM.

Jun 16, 2012 4:57am | report
xBANxKAIx

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xBANxKAIx

hi guys..can help me? im lifting 5 pounds of dumbells and i lift it 70 times. how many reps is that?
sorry newbie in teen bodybuilding dunno much yet. u can reply via email: here's mine
joshua.pascual23@gmail.com. any reply will be highly appriciated thankyou..

Jun 17, 2012 5:18pm | report
emzero2

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emzero2

For some reason the calculator is returning wrong results in some cases.
For example:
8 reps of 50kg:
1RM = 50 * 0.0333 * 8 50
1RM = 63,32
But the calculator is returning 62.

Jun 30, 2012 12:06pm | report
  • Body Stats
  • ht: 12'4"
  • wt: 148.94 lbs
  • bf: 15.0%
charlie_g68

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charlie_g68

never done dead lifts before in my life and im 44 but took the advise and did 2 warm up sets and got up 175lbs 10 time. i could have done more but wanted to be careful. did another set to 8 so i stopped there. next week im goona try 180/185,i'm pretty sure i can do it but the warm ups were key. great advise ty!

Article Rated:
Jul 8, 2012 5:51pm | report
kpw1989

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kpw1989

I'll be doing some calculations tomorow :D

Jul 18, 2012 3:54pm | report
motivation2give

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motivation2give

I wish I could save these pages on in folder on here some kind of way. This is another good one!

Jul 31, 2012 2:27pm | report
frenchman86

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frenchman86

I know this is a little late.... but you can click the star on your firefox browser and save them to your bookmark menu, toolbar or unsorted bookmark menu.

Mar 25, 2014 5:48am | report
kbespy

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kbespy

Love this!

Aug 2, 2012 8:19pm | report
NotOverYet50

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NotOverYet50

As someone who is just starting out, with no education on body building, this is an awesome tool. I now know what to expect from myself , takes out all the guess work.
Thanks

Aug 11, 2012 12:29pm | report
eagleappaloosa

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eagleappaloosa

Freakin' "Einstein"...

Sep 21, 2012 9:27pm | report
silvanita

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silvanita

it's great!!!

Oct 3, 2012 7:57pm | report
  • Body Stats
  • ht: 11'11"
  • wt: 143.52 lbs
  • bf: 15.0%
bigdawgnc

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bigdawgnc

I like this calculator cause it pushes me to do more.....

Oct 6, 2012 8:07pm | report
Showing 1 - 25 of 52 Comments

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