Bench Press 1RM Calculator
Estimate your bench press one-rep max from any working set — no need to grind out a true max attempt. Enter your weight and reps below for an instant estimate, plus the training percentages you need for programming.
| % of 1RM | Weight | Typical Reps |
|---|---|---|
| 100% | 69 kg | 1 rep (your max) |
| 95% | 65.5 kg | 2 reps |
| 90% | 62 kg | 3-4 reps |
| 85% | 58.5 kg | 5-6 reps |
| 80% | 55 kg | 7-8 reps |
| 75% | 51.5 kg | 9-10 reps |
| 70% | 48 kg | 10-12 reps |
| 65% | 44.5 kg | 12-14 reps |
| 60% | 41.5 kg | 15+ reps |
No signup required. Results update instantly as you type.
Track your bench 1RM automatically
Log your working sets in 1RM.fit and your estimated bench press 1RM updates itself — no manual math, ever.
What Is a Bench Press 1RM?
Your bench press one-rep max (1RM) is the heaviest weight you can press for a single, full-range rep with good form. It's the standard unit strength athletes use to compare bench strength, program training percentages, and track progress over time.
Testing a true 1RM is exhausting, adds unnecessary fatigue, and carries real injury risk — especially on bench, where failing under a heavy bar without a spotter is genuinely dangerous. Almost nobody needs to test a true max more than once or twice a year.
Instead, the standard approach is to estimate your 1RM from a normal working set of 1-12 reps using a proven formula. That's what this calculator does automatically.
How the Bench Press 1RM Formulas Work
This calculator runs your weight and reps through two of the most widely used strength formulas, then averages them for a more stable estimate.
Epley formula: 1RM = weight × (1 + reps ÷ 30). Epley tends to estimate slightly higher and is the formula built into most fitness apps and gym calculators.
Brzycki formula: 1RM = weight × (36 ÷ (37 - reps)). Brzycki is generally considered the more accurate of the two in the 3-10 rep range, where most working sets fall.
Neither formula is perfect — both lose accuracy above ~12 reps because muscular endurance starts to matter more than raw strength. That's why this calculator caps input at 12 reps and averages both formulas rather than leaning on just one.
Why Estimating Beats Maxing Out Every Week
- It's safer. A true 1RM attempt on bench without a dedicated spotter or safety pins is one of the riskiest things you can do in the gym. Estimating from a working set removes that risk entirely.
- It's more stable. Your actual 1RM can swing 5-10% day to day based on sleep, stress, and how recently you've eaten. An estimate from your normal training weight is a steadier number to program around.
- It's better for programming. Programs like 5/3/1 and most powerlifting templates are built around percentages of your 1RM. An accurate estimate gives you correct working weights without needing a max-out session every training block.
- It saves recovery. A true max effort set can cost days of central nervous system fatigue. An estimate costs nothing beyond your normal working set.
Bench Press Strength Standards (kg)
Use this table as a rough benchmark for where your estimated 1RM sits relative to other lifters. These are general reference ranges for an average adult bodyweight (roughly 80 kg for men, 65 kg for women) — your own ratio will shift with bodyweight, training age, and limb length.
| Level | Men (kg) | Women (kg) |
|---|---|---|
| Untrained | 40 kg | 20 kg |
| Novice | 60 kg | 30 kg |
| Intermediate | 85 kg | 42 kg |
| Advanced | 115 kg | 57 kg |
| Elite | 145 kg | 72 kg |
Figures are approximate reference standards, not a substitute for bodyweight-adjusted strength calculators.
Bench Press 1RM Calculator FAQ
How accurate is a bench press 1RM calculator?
Within the 1-10 rep range, Epley and Brzycki are typically accurate within about 2-5% of a true tested max. Accuracy drops the higher your rep count goes, which is why we cap input at 12 reps.
Should I test my true bench press max instead of estimating?
Only occasionally — for example before a powerlifting meet, or if your estimated 1RM has stalled for 12+ weeks despite consistent training. For everyday programming, an estimate from your working sets is safer and just as useful.
Why do Epley and Brzycki give different numbers?
They're built from different data sets and weight the relationship between reps and fatigue slightly differently. Neither is 'correct' — averaging both, as this calculator does, gives a more balanced estimate than trusting either one alone.
What's a good bench press 1RM for my bodyweight?
As a rough guide, a novice male lifter can typically bench close to bodyweight, an intermediate lifter 1-1.25x bodyweight, and an advanced lifter 1.5x bodyweight or more. See the strength standards table above for more detail.
Stop Estimating by Hand
1RM.fit calculates your bench, squat, deadlift, and OHP 1RM automatically from every set you log. Free to start.