Max Squat Estimate Help

Hey everyone I wanted to know if anyone could give me an estimate on a 1 rep squat max, I tried a calculator and it seemed a little off.
I know everyones different and im not trying to get a perfect answer, just want a estimate, especially if someone has a similar lift to me.

I did 315 pounds for 20 reps.
Thanks everyone.

Work up to your max? You could try PMing Stallion, he does a lot of high rep squatting.

i doubt anyone could give you even close to your max on a 20 rep squat…the closer you are to your 1 rep max, the more accurate you will get using any type of max calculator. 20 reps is way to far up the spectrum.

Depends also how well you can keep stable at higher weights. 315 for 20 widowmaker style you’d be decent for 430ish

edit: this is based only on personal experience

What vikingrob said. Plus, even at lower rep ranges it depends on how long you are pausing (how many breaths you are taking) between reps. If you can get 6 reps at a given weight but these are more like rest-paused singles, then your true 1RM will be a lot lower than what you would get out of a 1RM calculator.

If you care so much just get a spotter and go for it. It will be lower than you expect if you usually stick around 10-20 reps.