Bench Press 1RM Calculator
Estimate your bench press one rep max with validated formulas and a practical %1RM loading table — perfect for programming hypertrophy, strength and peaking blocks.
Bench standards table
Reference profile based on common ExRx/Symmetric Strength ranges.| Level | Relative load |
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FAQ
How accurate is a bench press 1RM calculator?
When you use a set between 2 and 10 reps taken close to failure, the average estimate from these four formulas is typically within 5–8% of your real bench max. Accuracy drops above 12 reps or with very fresh sets where reps in reserve are unclear.
Which formula should I trust most for bench press?
Use the average across the four formulas as your primary number — it cancels out the individual bias of each formula. Brzycki tends to be more conservative in the 8–12 rep range, while Epley reads slightly higher in 1–5 reps. Looking at the spread tells you how confident the estimate is.
Does grip width change my estimated 1RM?
Not in the math. Reps × weight is the same regardless of grip. But your real bench max can shift 5–15% between narrow, medium and wide grip because of leverages and triceps demand, so always log the grip you used when comparing across sessions.
Can I use this for dumbbell bench press?
You can plug the per-hand weight in to get a rough estimate, but the strength standards on this page are calibrated for barbell bench. Dumbbell-to-barbell ratios vary from 0.6 to 0.9 depending on stabilization demands and shoulder structure.
How often should I retest my bench 1RM?
Once every 4–8 weeks is enough for most lifters. If you are running a linear or block program, recalculate at the end of each block using your top working set rather than testing a true 1RM, which adds fatigue without much extra information.
Why does adding RPE change my estimated max?
RPE captures how close to failure your set was. An 8/10 RPE means you had 2 reps in reserve, so the calculator treats your set as if you actually did 2 more reps for estimation purposes. This is the single biggest accuracy improvement you can make over a plain weight × reps calculator.