How accurate is this 1rm calculator? (serious)

cmmulla · 07-09-2007, 05:46 PM

http://www.bodybuilding.com/fun/1rm.htm

just wondering how yours compares to it.. i don't want to waste a workout today on finding my 1rm so i'm just curious how yours all compare.

pryme · 07-09-2007, 05:53 PM

Seems close.

tgk_pl · 07-09-2007, 06:22 PM

I usually use 10% on a triple, eg 300x3 should be good for about 330 max single. I find that 1RM calculator to be off by 1 rep. I just googled and checked a bunch of 1 RM calculators and I entered 300x3 and got either 318 or 327.

Best thing to do is keep track of your #'s and when you max, use your max triple to determine you own percentages.

LockOut · 07-09-2007, 06:45 PM

It is a complete joke...everyone is very different..If you train with all low reps for power you burn out faster...example is a guy I know can rep 225lbs the same as me, but my max is 70lbs more then his...he trains with high reps.

jmil · 07-09-2007, 09:38 PM

Quote:

Originally Posted by LockOut

It is a complete joke...everyone is very different..If you train with all low reps for power you burn out faster...example is a guy I know can rep 225lbs the same as me, but my max is 70lbs more then his...he trains with high reps.

Exactly...those do not work for everyone. On ME Exercises, I don't go above 3 reps, those things will never be able to determine my 1 rep max.

John Prophet · 07-09-2007, 10:15 PM

obviously the less reps u use the closer it is. In other words if u enter a 10 rep numbers its a total crapshoot. a 5 rep number is closer, a 3 rep is even closer

I maxed 315 on bench the other day. I missed 325

2 weeks before I did 275x5..for 275x5 it says 309

I did 295x3 and that comes to 312

so for me it comes up only SLIGHTLY conservative

The_Brawler · 07-10-2007, 12:12 AM

Best thing to do is just get your own percentages for future references.

ShogunAssassin · 07-10-2007, 02:28 AM

The day I consider a one rep max test a wasted workout is the day I put a bullet in my brain.

StrongInChrist · 07-10-2007, 04:29 AM

I put in 100 pounds for 1 rep and it calculated 100 pounds for my one rep max, therefore it works. /thread

Mike Zero · 07-10-2007, 05:15 AM

^ Lol

How accurate? Not very.

Besides, everyone's different.

IRON_MANII · 07-10-2007, 11:52 AM

iam really against these 1rm calculators....who needs them, and who cares if they are accurate....u can determine ur 1rm just by trying to max out at the end of ur bench routine, all u need to do is know ur body and know wat weight u can handle.....

Newbtime · 07-10-2007, 12:00 PM

it depends, if you benched 275x5 hard as fck it would tell you like 315, but if you did it some what easier it would tell you the same thing, it doesn't know how hard your worked on your set, and it doesn't know how you usually train for what rep range your best at, so it can't be 100% accurate.

bee su · 07-10-2007, 01:11 PM

it works for me on most lifts.

turbo271 · 07-10-2007, 02:04 PM

to find your 1rm max, do as much heavy weight as you can for 1 rep

There's your 1rm calculator. The only accurate one.

MidwestMonster · 07-10-2007, 03:11 PM

Not very.

You can NEVER get a 1rm from a rep max.

Even tho idiots on this site think that you can.

Newbtime · 07-10-2007, 03:19 PM

Quote:

Originally Posted by MidwestMonster

Not very.

You can NEVER get a 1rm from a rep max.

Even tho idiots on this site think that you can.

wow strong bench to dl ratio

rawPL · 07-10-2007, 09:46 PM

there seems to be a huge hating going and i hate to get involved, but sometimes i do succumb to the guilty pleasure that is the theoretical 1rm calcs. i find as long as you plus in your absolute rep maxes theyre never that far off. Take them with a grain of salt, but they are fun to see say, what your max could be at the end of some training program like smolov or w.e.

heres the one i find the most useful, bc it has dif. coefficients for dif. lifts

http://www.muscletech.com/CALCULATOR..._rep_max.shtml

anyways enjoy

rwgober92 · 07-10-2007, 10:24 PM

it was pretty close on my weights...not perfect but close

verbatim9 · 07-11-2007, 03:48 PM

Bb.com 1rm calc. I entered 220 for 8 reps on squat, it says 275 is my 1rm

calc. on the link this posted in this thread says 292 for the same weight/reps?

wtf?

JustinStephan89 · 07-11-2007, 05:31 PM

that calc is crap........ the only 1rm calculator that in my opinion is actually very very accurate is the one on criticalbench.com

Perceptionist · 07-11-2007, 10:20 PM

it all depends on the person, style, and technique of benching and doing reps. also the higher the reps, obviously the lower the accuracy. honestly if you want to find out just max, don't assume.

jgreystoke · 07-12-2007, 02:09 AM

Quote:

Originally Posted by Perceptionist

it all depends on the person, style, and technique of benching and doing reps. also the higher the reps, obviously the lower the accuracy. honestly if you want to find out just max, don't assume.

Spot on, Perceptionist.

People are far to anal about this kind of thing......kind of like the guy who tells you in all seriousness that his bodyfat is 13.4% when we all know that the error is +/- 3%, and increases the leaner you get.

A very simplified chart looks like this:

1 rep 100%
2 reps 95
4.......90
6.......85
8.......80
10.....75
12.....70
and then
15.....65
20.....60

This is really easy to remember. For every next even rep in the range most people are interested just take off 5%

All very neat......but THIS IS UTTER NONSENSE. It sure sells books and articles, though.

The following chart is fairly accurrate for most lifts, most people:

1rep......100%
2...........95
3...........90

And that's it! The error could be up to 1-2% but the working figures are a useful guide.

After that, accuracy falls off a cliff. Many do high reps(in my book, anything over 5) but never go low. They really have no idea what their 1rm is.

The reverse is also true. When I went from my favourite 5x5(ramping the weight) to 8reps once, I had to drop the weight in almost every exercise by a whopping 25-30%! Not the 7.5% the typical chart solemnly "informs" us.

I was just so totally unconditioned for the higher rep range.

Currently I add a backdown set or two of higher reps, up to 10. I want to add size as well as endurance. My high rep strength has gone way up......with hardly any effect at all on my low rep strength.

To MY chart i can add

4.....85
5 or 6 ...80%.......or thereabouts.......sorta.
10........no idea, it is still increasing!

Bottom line, your workout journal tells you that a particular 100kg lift for 5 reps in good form is worth a 120kg single. For YOU the 20% or 1.2x factor is accurate.........but only for that or similar lift.

Put no faith in all the scientific mumbo jumbo(I have a science background).

Your journal, and iron on the bar, never lies.

Best of luck, all you guys into strength and power.