Bench press one-rep max calculator

Bench press one-rep max calculator. Weight lifted · Repetitions · 1RM. Change the values you know. Every result updates instantly in your browser.

01 · Starting values

Your editable starting point

Change the values you know. Every result updates instantly in your browser.

kg / lb

Weight lifted

Repetitions

Bar weight

03 · What the numbers mean

1RM formulas are estimates. Do not test a maximum without appropriate technique, safety equipment and supervision.

Estimated 1RMWeight lifted · Repetitions · 1RM100.3 kg

EpleyW × (1 + R ÷ 30)101.3 kg

BrzyckiW × 36 ÷ (37 − R)99.3 kg

80% · one sideAfter subtracting the bar, before rounding to available plates.30.1 kg

04 · Method and limits

1RM formulas are estimates. Do not test a maximum without appropriate technique, safety equipment and supervision.

Does the result update automatically?

Yes. Every calculation runs locally in this browser as soon as a value changes.

Is this an official decision?

1RM formulas are estimates. Do not test a maximum without appropriate technique, safety equipment and supervision.