One-Rep Max Chart: Find Your 1RM & % (2026)

TL;DR

A one-rep max chart shows how the weight you can lift for multiple reps maps to a percentage of your one-rep max (1RM). For example, a weight you can lift for 5 reps is roughly 87% of your 1RM. You can estimate your 1RM without ever attempting a true max by plugging a submaximal set into the Epley or Brzycki formula, then read across the chart to program every other training day. Below you get the full rep-to-percentage chart, both formulas written out, and a plan for turning those numbers into strength, hypertrophy, or endurance work.

Most people meet the one-rep max chart as a blurry PDF taped to a gym wall or buried in a coaching handout. This is the explained version: what the numbers mean, where they come from, and how to actually use them so your next 12 weeks of training aren't just guesswork. If you want the answer in ten seconds, drop your numbers into our one-rep max calculator — but read on if you want to understand what it's doing.

What is a one-rep max (1RM)?

Your one-rep max is the heaviest weight you can lift for a single, full repetition of an exercise with good form. It's the standard reference point in strength training. Almost every training load can be described as a percentage of it. A "5x5 at 80%" or a back-off set at 65% only means something once you know your 1RM.

Think of your 1RM as a personal ruler. It's specific to each lift. Your bench 1RM and your squat 1RM are different numbers. It's also specific to you on a given day. Sleep, stress, and how recently you trained all nudge it up or down. That's fine. You don't need a perfect number. You need a good-enough number to program from.

Testing a true 1RM is demanding. It's also slightly risky, especially for beginners. On lifts like the squat and deadlift, a failed max rep can go wrong fast. So most lifters skip the true test. Instead they estimate their 1RM from a set they can actually complete.

Here's the key insight. The relationship between reps and percentage of 1RM is remarkably consistent across people. Say two lifters can each do exactly 5 reps with a given weight. That weight is close to 87% of each person's 1RM. This holds even if one maxes at 100 lb and the other at 400 lb. That consistency is what makes a one-rep max chart useful.

You'll see the 1RM show up everywhere in training. Coaches write programs as percentages. Apps calculate your loads from it. Competition lifting uses it to seed attempts. Learn to read the chart once, and a lot of strength advice suddenly makes sense.

The one-rep max chart (reps to % of 1RM)

The table below is the core of any one-rep max chart. Find the number of reps you can complete to failure with good form, and read across for the approximate percentage of your 1RM that weight represents.

These percentages line up closely with the widely cited training-load chart from the National Strength and Conditioning Association (NSCA). The NSCA is the certifying body behind the Certified Strength and Conditioning Specialist credential, so its chart is a solid reference. You can read the chart in reverse, too. Say you know your 1RM and want to train at 80%. That row tells you to expect roughly 8 reps in the tank.

How to read the chart

Start with a set you took close to failure. Count the clean reps. Find that row in the table. The percentage next to it is how heavy that weight was relative to your max. From there you can do two things. You can estimate your 1RM. Or you can pick a target percentage and back into the load.

Here's a quick worked example. You just did dumbbell rows for 8 reps at 60 lb. The chart puts 8 reps at about 80% of your 1RM. So 60 lb is roughly 80% of your max. That makes your estimated row 1RM around 75 lb. Want to train rows for strength at 87%? That's about 65 lb for sets of 5.

Two honest caveats round this out. First, the chart is least reliable at high rep counts. Past about 10–12 reps, differences in muscle fiber makeup and conditioning widen the spread. So a "20-rep max" is a shakier way to estimate 1RM than a 5-rep set. Second, the numbers assume clean reps taken close to failure. Half-reps throw the estimate off. So does stopping three reps short of a real grind.

How to calculate your 1RM (Epley and Brzycki formulas)

The chart is built from prediction equations. The two most cited are the Epley formula (published by Boyd Epley in 1985) and the Brzycki formula (published by Matt Brzycki in 1993). Both take the weight you lifted and the number of reps you completed and return an estimated 1RM.

Epley formula:

1RM = weight × (1 + reps / 30)

Example: you bench 185 lb for 5 clean reps. Epley gives 185 × (1 + 5/30) = 185 × 1.167 = 216 lb estimated 1RM.

Brzycki formula:

1RM = weight × 36 / (37 − reps)

Same set, 185 lb for 5 reps: Brzycki gives 185 × 36 / (37 − 5) = 6,660 / 32 = 208 lb estimated 1RM.

The two formulas usually land within a few percent of each other. Epley tends to read slightly higher. Brzycki tends to read slightly lower. Both are most accurate in the 1–10 rep range. A common approach is to run both formulas and treat the gap between them as your working range. That's safer than trusting one number to the pound.

Notice what the reps do to the estimate. Fewer reps give a tighter, more trustworthy number. A true 1-rep set is just the weight itself. A 3-rep set is close behind. By the time you're using a 10-rep set, small errors get amplified. So if you can, estimate from a heavier set of 3 to 6 reps rather than a light set of 12.

You don't have to do the arithmetic by hand. Our one-rep max calculator runs both formulas at once. It shows the estimate and prints your full percentage chart. From there you can program a training block immediately. It's the fastest way to turn one work set into a plan.

There's a habit angle here too. A quick max estimate every three to four weeks is one of the cleanest ways to track progress. You don't need to test a true max to know you're getting stronger. The same load that used to be a hard 5 becomes an easy 5. That's the logic behind a workout tracker app that logs your loads over time and shows the trend.

How to use your 1RM for training

A 1RM estimate is only useful if it changes what you put on the bar. Percentage-based programming is the standard method: you assign each session a percentage of your 1RM, which controls how heavy and how many reps you train. The right percentage depends on your goal.

The table below maps the three classic training goals to their percentage ranges and rep counts. These ranges reflect the load recommendations summarized in the NSCA's resistance-training guidelines.

Here's what that looks like in practice. Say your estimated squat 1RM is 300 lb.

• Strength focus: 5x5 at 80% means 5 sets of 5 reps at 240 lb. Heavy, low reps, long rest.
• Hypertrophy focus: 4x10 at 70% means 4 sets of 10 reps at 210 lb. Moderate load, moderate reps, shorter rest.
• Endurance focus: 3x15 at 60% means 3 sets of 15 reps at 180 lb.

Two practical rules keep this honest. First, recalculate your percentages whenever your estimated 1RM changes. Chasing an old, too-light number stalls progress. An inflated one invites missed reps and sloppy form. Second, don't train at 90% or more every session. Strength programs cycle heavy and lighter weeks on purpose. You can't hammer near-max loads forever without piling up fatigue.

One more note on rest. Heavier percentages need longer rest between sets. At 85% and above, give yourself two to three minutes. At 70% and below, one to two minutes is usually enough. Rushing your rest turns a strength set into a conditioning set, which changes what the percentage actually trains.

Consistency matters more than any single percentage. Progressive overload means nudging the load up over weeks. It only works if you actually show up. That's why logging each session beats relying on motivation. A training streak keeps you honest on the days you don't feel like lifting. If exercise is still an on-and-off thing for you, our guide on how to make exercise a habit covers the behavior side. And fitness consistency digs into staying on track past week three.

A simple percentage week

Not sure how to arrange the numbers across a week? Here's a clean template built on a single 1RM. It cycles heavy, medium, and lighter days so you don't grind near-max every session.

• Day 1 — heavy: 4 sets of 4 at 85%. Build strength with low reps.
• Day 2 — light: 3 sets of 8 at 70%. Add volume and practice form.
• Day 3 — medium: 5 sets of 5 at 80%. The classic strength driver.

Each week, aim to add a small amount of weight. Maybe 5 lb on the big lifts. Recalculate your percentages when your estimated 1RM climbs. That's progressive overload in plain numbers.

1RM notes for the big lifts

The chart works for any exercise. But a few lifts deserve extra care because a missed rep carries more risk.

Bench press. The bench is where a failed max can pin you. Always use a spotter or a rack with safety pins. Estimate from a 3 to 5 rep set instead of testing when you train alone. A bench press max chart is really just the same rep-to-percentage table applied to your press.

Squat. A missed squat is dangerous without safeties. Set the pins just below your bottom position. Beginners should estimate rather than test for the first several months of training.

Deadlift. The deadlift has no "spot" — you just drop it. That makes it a bit safer to attempt, but grinding reps here strain the lower back. Stop the moment your back rounds.

Overhead press and rows. These smaller lifts are lower risk. They're a fine place to practice reading the chart and estimating loads before you apply it to the bigger lifts.

For most people, running the estimate on these lifts is plenty. If you also train pure bodyweight work, the same "leave reps in reserve" mindset applies — our 100 pushups program uses submaximal sets the same way a percentage program does.

Common mistakes with the one-rep max chart

A few errors show up again and again. Avoiding them keeps your numbers useful.

• Counting sloppy reps. Half-reps inflate your estimate. Only count reps you'd be proud to show a coach.
• Estimating from a super-light set. A 15-rep set is a weak predictor. Use 3 to 8 reps when you can.
• Never updating the number. An old 1RM makes today's training too easy. Re-estimate every few weeks.
• Maxing out too often. Testing a true 1RM is taxing. Once every few months is plenty for most lifters.
• Chasing the estimate instead of training. The number is a tool, not the goal. Consistent effort builds the strength that raises it.

Should you test your true 1RM?

For most lifters most of the time, no. An estimate from a 3 to 5 rep set gets you within a few percent of your true max. And it skips the risk and recovery cost of a genuine one-rep attempt. Estimates are more than accurate enough to program from.

There are real reasons to test a true 1RM. Powerlifters need competition-accurate numbers. Some lifters simply want a benchmark to chase. If you do test, treat it seriously. Warm up thoroughly with progressively heavier singles. Use a spotter or safety pins on the squat and bench. Never test a lift you haven't trained heavy recently. And stop the moment your form breaks down. A grinding, form-lost "max" isn't a real 1RM. It's an injury waiting to happen.

The general safety guidance from major fitness organizations is consistent. Beginners should build a base of technique first. Moderate-load training comes before maximal lifts. If you're newer to the barbell, spend your first months estimating from higher-rep sets. Let a true test wait until your form is solid under load.

There's no rush. A well-programmed lifter who never tests a true max can still get very strong. The estimate does almost all of the work. When you're ready to run the numbers, the one-rep max calculator turns any submaximal set into your full chart in seconds.

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