Free 1-Rep Max Tool
Bench Press Calculator
Estimate your bench press one-rep max from any set. Enter the weight you lifted and how many reps you hit, and get your 1RM, training percentages, rep targets and the plates to load, all without ever attempting a true max under the bar.
Your Bench Press Rep-Max Targets
The weight you should be able to bench for a given number of reps.
Your estimated one-rep max converts into target weights for every rep range. Use these to pick a working weight: if your program calls for a set of five, the 5-rep row is your starting load. The table updates with your estimate above.
| Reps | Estimated weight | % of 1RM |
|---|---|---|
| 1 rep (max) | 260 lb | 100% |
| 2 reps | 243 lb | 94% |
| 3 reps | 236 lb | 91% |
| 4 reps | 229 lb | 88% |
| 5 reps | 223 lb | 86% |
| 6 reps | 216 lb | 83% |
| 8 reps | 205 lb | 79% |
| 10 reps | 195 lb | 75% |
| 12 reps | 185 lb | 71% |
How the Bench Press Calculator Works
Five established formulas, averaged for a steadier estimate.
A bench press calculator estimates your one-rep max by working backwards from a set you already completed. The more reps you do at a given weight, the further that weight sits below your true max, and prediction formulas model that relationship. This tool runs your input through five equations at once, then averages them so no single formula's bias skews the result.
The five formulas
Each equation was developed from strength-testing data and is standard in the strength-and-conditioning field:
- Epley and Brzycki are the two most widely used; they agree closely at low reps.
- Lombardi, Lander and Wathan model the rep-to-max curve slightly differently, which matters more as reps climb.
Estimates are most reliable at five reps or fewer. Beyond about ten reps, individual differences in muscular endurance widen the spread, so a high-rep estimate is a ballpark rather than a precise max.
These are long-established one-rep-max prediction equations from strength-training research. For training and coaching standards, the recognized professional body is the National Strength and Conditioning Association (NSCA). Estimates are guidance, not a substitute for coaching or medical advice, and a true max should only be attempted with proper warm-up and a spotter.
What Each Training Percentage Is For
How to turn your max into a training plan.
Once you know your one-rep max, you program by percentage of it. Different intensity zones drive different adaptations, so most structured bench programs cycle through this range.
| Percent of 1RM | Typical reps | What it trains |
|---|---|---|
| 90 to 100% | 1 to 3 | Maximal strength and testing |
| 80 to 90% | 3 to 6 | Heavy strength work |
| 70 to 80% | 6 to 10 | General strength and muscle |
| 60 to 70% | 10 to 15 | Volume, technique and endurance |
Specific Bench Press Examples
Common rep sets and the max they estimate.
What's my max bench if I do 225 for 5 reps?
Benching 225 for 5 reps estimates a one-rep max of about 260 lb. The five formulas range from roughly 253 to 264 lb, and averaging them lands near 260.
What's my max bench if I do 135 for 10 reps?
135 for 10 reps estimates a one-rep max near 179 lb. At ten reps the estimate is a ballpark, so retest with a heavier set of five for a tighter number.
What's my max bench if I do 185 for 3 reps?
185 for 3 reps estimates a one-rep max around 201 lb. Low-rep sets like this give the most accurate projection.
What's my max bench if I do 155 for 8 reps?
155 for 8 reps estimates a one-rep max near 194 lb. That set sits around 80% of your max.
What's my max bench if I do 275 for 2 reps?
275 for 2 reps estimates a one-rep max around 289 lb. A double is close to your max, so this projection is reliable.
What's my max bench if I do 315 for 1 rep?
A single at 315 is your one-rep max: 315 lb. Every formula returns the lifted weight when reps equal one.
What's my max bench if I do 205 for 5 reps?
205 for 5 reps estimates a one-rep max near 237 lb.
What's my max bench if I do 95 for 12 reps?
95 for 12 reps estimates a one-rep max around 133 lb. High-rep sets are best for building volume, not testing a max.
What's my max bench if I do 245 for 4 reps?
245 for 4 reps estimates a one-rep max near 275 lb.
What's my max bench if I do 115 for 6 reps?
115 for 6 reps estimates a one-rep max around 136 lb.
Want a specific number? Type your weight and reps into the calculator at the top and it will estimate any combination instantly.
Calculators for Every Lift
The same method, tuned for each barbell movement.
A 12-Week Bench Program Built on Your Numbers
A percentage-based bench press program that plugs straight into the max you just calculated. Not available yet, check back soon.
Bench Press Gear
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Wrist Wraps
Support the wrist joint under heavy loads and keep the bar stacked over your forearm.
Shop on AmazonLifting Belt
A stiff belt helps you brace harder on your heaviest bench and press attempts.
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Add accommodating resistance or work the lockout with a set of heavy-duty bands.
Shop on AmazonBench Press Calculator FAQ
Answers to the most common one-rep-max questions.
How does a bench press calculator work?
A bench press calculator estimates your one-rep max from a set you already did. You enter the weight and how many reps you completed, and the calculator applies established prediction formulas to project the single heaviest weight you could lift for one rep.
How accurate is a bench press 1RM estimate?
Estimates are most accurate at low rep counts. At one to five reps the projection is usually within a few percent of a true max. Above about ten reps accuracy falls off because endurance and fatigue vary more between lifters, so treat high-rep estimates as a guide rather than a precise number.
Which 1RM formula is most accurate?
No single formula wins for everyone. Epley and Brzycki are the most widely used and agree closely at low reps. This calculator averages five formulas (Epley, Brzycki, Lombardi, Lander and Wathan) so no single equation's bias dominates the result.
How do I calculate my max bench press without testing it?
Do a set of a challenging weight for a known number of reps, ideally five or fewer, leaving one rep in reserve. Enter that weight and rep count above and the calculator estimates your one-rep max, so you never have to attempt a true max under the bar.
What does 225 for 5 reps mean for my max bench?
Benching 225 pounds for 5 reps estimates a one-rep max of about 260 pounds. That is the averaged projection across five formulas; the individual formulas range from roughly 253 to 264 pounds.
What are training percentages used for?
Training percentages let you program by intensity. Most strength work sits between 70 and 90 percent of your one-rep max: heavy strength sets near 85 to 90 percent, general strength near 75 to 85 percent, and higher-rep volume near 65 to 75 percent.
Is it safe to test my true one-rep max?
A true max attempt carries more injury risk than submaximal work, especially without a spotter or experience. Estimating your max from a rep set avoids that risk entirely, which is why most coaches program from estimates and test a true max only occasionally.
How much should I be able to bench for my bodyweight?
As a rough guide, an intermediate male lifter benches around bodyweight for one rep, an advanced lifter around 1.5 times bodyweight, and an elite lifter around twice bodyweight. Enter your bodyweight above to see where your estimated max falls.
Does the calculator work in kilograms?
Yes. Switch the unit toggle to kg and the weight input, results, training percentages and plate math all convert to kilograms, using a 20 kg Olympic bar for plate loading.
What is the difference between 1RM and rep max?
A one-rep max (1RM) is the most weight you can lift for a single rep. A rep max is the most you can lift for a given number of reps, such as a 5-rep max. The rep-max table above converts your estimated 1RM into target weights for 2 through 12 reps.
How do I use the plate calculator?
The plate loader shows which plates to put on each side of the bar to reach your estimated max. It starts from a standard 45-pound (or 20 kg) Olympic barbell and loads the heaviest plates first.
Can I estimate my max for squat, deadlift and overhead press too?
Yes. The same method works for every barbell lift. Use the squat, deadlift and overhead press calculators linked above for lift-specific strength standards and examples.
How often should I recalculate my max?
Recalculate whenever you hit a new rep record on a working set, which for most lifters is every few weeks. Rebasing your training percentages on a fresh estimate keeps your programming aligned with your current strength.