Calculate your estimated bench press one-rep max (1RM) from a
completed set using pounds (lb) or kilograms (kg).
For bench press 1RM prediction, lower-repetition sets are generally
more useful than very high-repetition sets. Research has found more
variable prediction results above 10 repetitions.
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Estimated Bench Press 1RM
Bench press training weights by percentage of estimated 1RM
Ready to turn your estimated bench press max into a real training
load?
Use the Barbell Plate Calculator
to find the plates to load on each side.
What Is a Bench Press 1RM?
Your bench press one-rep max, or 1RM, is the heaviest weight you
can successfully bench for one repetition under a defined testing
setup. A bench press max calculator estimates that
number from a submaximal set instead of requiring you to attempt a
true maximum.
This makes an estimated 1RM useful for tracking strength, setting
percentage-based training weights, comparing different training
sessions, and choosing a starting point for a strength program.
It is still an estimate rather than a direct measurement of your
maximum performance.
If you are looking for a general
one-rep max calculator
,
our general 1RM calculator can estimate max strength for other
exercises as well.
How to Calculate Your Bench Press Max
Enter the total weight you lifted and the number of completed
repetitions. Select pounds (lb) or kilograms (kg), choose a
prediction formula, and calculate your estimated bench press 1RM.
Enter the total weight you successfully lifted.
Enter the number of completed bench press reps.
Choose lb or kg.
Select an estimated 1RM formula.
Calculate your estimated bench press max.
Use a clean set with consistent technique and range of motion.
Avoid treating the calculator as a guarantee that you will be able
to lift the displayed number on your next attempt.
For most users, a recent hard set in the lower-to-moderate rep range
is a more useful starting point than a very high-repetition set.
Bench press research has found useful relationships between
repetition performance and measured 1RM, while also showing that
prediction error can vary with the repetition range and equation.
See the bench press prediction research.
Bench Press 1RM From 5 Reps
One of the most common ways people search for a
bench press 1RM calculator is by entering a
5-rep set. For example, if you bench press 225 lb for 5 reps,
different prediction equations produce different estimates.
The difference is important: a 1RM formula is a prediction model,
not a direct measurement. In a bench press study of 220 participants,
Brzycki was the most accurate of the equations examined for people
completing 10 or fewer repetitions, while the authors advised
caution when using repetition-based prediction and noted that
averaging equations may reduce error.
View the PubMed study.
If your main question is
“what is my bench max from 5 reps?”,
enter your actual 5-rep weight above rather than relying on a
generic chart.
Bench Press Percentage Chart
Once you have an estimated bench press 1RM, you can convert it into
working weights using percentages. Percentage-based loading is a
common way to prescribe relative resistance-training intensity.
Common reference points for bench press training
1RM %
General use
90–100%
Very heavy, low-repetition strength work
80–89%
Heavy strength-focused work
70–79%
Moderate-load strength and higher-volume work
60–69%
Lighter-load technique and higher-repetition work
These are reference ranges, not universal rep prescriptions. The
number of repetitions a person can perform at a given percentage
varies with training experience, exercise, fatigue, technique and
individual characteristics.
Current resistance-training evidence supports heavier loads for
maximizing strength adaptations, while hypertrophy can be achieved
across a broader range of loading when training is appropriately
structured.
Review the 2026 ACSM position stand.
The calculator offers four established repetition-based prediction
equations. Each formula models the relationship between weight and
repetitions differently, so the same bench press set can produce
different estimated 1RMs.
1. Epley Formula
1RM = Weight × (1 + Reps / 30)
Epley uses a simple linear relationship between the weight lifted
and repetitions completed. It is widely used because it is simple
to calculate and easy to apply to percentage-based training.
2. Brzycki Formula
1RM = Weight × 36 / (37 − Reps)
Brzycki is a commonly used repetition-based prediction equation.
In the bench press study by Mayhew and colleagues, it was the most
accurate equation among those studied for sets of 10 or fewer
repetitions. That finding applies to that study population and
should not be interpreted as proof that Brzycki is universally the
most accurate formula for every lifter or situation.
Read the study.
The Brzycki equation is mathematically defined for integer rep
counts from 1 through 36. This calculator blocks 37 or more reps
when Brzycki is selected.
3. Lander Formula
1RM = (100 × Weight) / (101.3 − 2.67123 × Reps)
Lander is another established repetition-based prediction equation.
Because its denominator changes with the repetition count, the
calculator prevents calculations when the denominator is no longer
positive.
4. Lombardi Formula
1RM = Weight × Reps^0.10
Lombardi uses a non-linear power relationship between repetitions
and estimated maximum strength. Like the other equations, its
output should be interpreted as an estimate rather than a direct
measurement.
If you want to compare your estimated max across several exercises,
use the main
1RM Calculator
.
Why Can Bench Press 1RM Estimates Differ?
Your estimated bench press max can change depending on the formula,
number of repetitions, fatigue, technique, range of motion, training
experience and how close the input set was to failure.
Two lifters can perform the same percentage of their 1RM for
different numbers of repetitions. For that reason, percentage
tables and 1RM equations should be treated as useful planning
references rather than exact predictions of individual performance.
If your estimates look unusually different, compare more than one
formula and use a clean lower-repetition set as another reference
point.
Should You Include the Barbell Weight?
Yes. Enter the total weight you actually lifted,
including the barbell and all plates.
A 45 lb (20 kg) bar is common in many gyms, but barbell weights vary
by bar type, manufacturer and training environment. If the bar has
a stated unloaded weight, use that actual value.
For example, if you use a 45 lb bar with a 45 lb plate on each side,
your total load is:
45 + 45 + 45 = 135 lb
It is the total load of 135 lb that should be entered into the
calculator, not just the plates.
Once you know the target training weight, the
Barbell Plate Calculator
can show the plates to load on each side.
Is 225 lb a Good Bench Press?
A 225 lb bench press is a widely recognized gym strength milestone,
but there is no universal “good” bench press number that applies
equally to every lifter.
Body weight, training experience, age, technique, range of motion,
equipment and testing conditions all affect how a bench press result
should be interpreted.
An estimated 1RM can be useful when you want to plan percentage-based
training, monitor strength changes or choose working weights without
repeatedly attempting a true maximum.
A true 1RM test directly measures your performance under the testing
conditions, but it requires substantially heavier loading. Heavy
bench pressing should be performed with appropriate preparation,
technique, equipment and safety precautions.
If you prefer to use a more conservative training value instead of
your estimated 1RM, use our
Training Max Calculator
.
If you follow Wendler-style programming, you can also use our
5/3/1 Calculator
to generate a complete four-week training cycle.
Bench Press Max Calculator: Common Search Questions
How do I calculate my bench press max?
Enter a recent bench press weight and the number of completed reps
into a 1RM prediction equation. The resulting number is an estimated
bench press max, not a guaranteed true maximum.
How do I calculate my bench press 1RM from 5 reps?
Enter the weight you successfully bench pressed for 5 reps and
select a 1RM formula. For example, 225 lb for 5 reps produces
approximately 262.5 lb using Epley and 253.1 lb using Brzycki.
What is my bench max if I can bench 225 for 5?
Using common prediction equations, 225 lb for 5 reps gives an
estimated 1RM of about 253–263 lb depending on the formula. The
difference illustrates why a calculated 1RM should be treated as an
estimate rather than an exact maximum.
How many reps should I use for a bench press 1RM calculator?
Lower-repetition submaximal sets are generally more appropriate for
1RM prediction than very high-repetition sets. Bench press research
found more variable prediction results above 10 repetitions, so
higher-rep estimates should be interpreted cautiously.
Which bench press 1RM formula is most accurate?
There is no formula guaranteed to be most accurate for every lifter.
In one bench press study, Brzycki was the most accurate among the
equations studied for sets of 10 or fewer repetitions. Other
exercises, populations and rep ranges can produce different results.
Sources & Methodology
RepMaths uses established repetition-based equations to estimate
bench press 1RM from submaximal performance. The calculator does not
claim that one equation is universally superior.
Prediction accuracy depends on factors including exercise, repetition
range, population, equation and testing conditions. The result should
therefore be used as a practical training estimate rather than a
laboratory measurement.
The calculator is intended for healthy adults using normal resistance
training. It is not medical advice and does not replace individualized
coaching, clinical assessment or appropriate spotting and safety
equipment for heavy bench pressing.
Frequently Asked Questions
How accurate is a bench press 1RM calculator?
A 1RM calculator provides an estimate rather than an exact
measurement. Accuracy varies with the formula, number of reps,
training experience, fatigue, technique and testing conditions.
Bench press research has found useful prediction relationships,
particularly at lower repetition counts, but higher-repetition
predictions can be more variable.
Can I calculate my bench press max without testing a true 1RM?
Yes. A submaximal set can be entered into a 1RM prediction equation
to estimate your bench press max. This can be useful for programming
and tracking strength without repeatedly attempting a maximal single.
What is my estimated bench max from 225 for 5 reps?
225 lb for 5 reps produces approximately 262.5 lb using Epley and
253.1 lb using Brzycki. Different equations produce different
estimates, so the calculator should be treated as a prediction tool.
Do I include the bar weight?
Yes. Enter the total load lifted, including the barbell and plates.
Use the actual bar weight when it is known because barbells do not
all weigh the same.
Is 225 lb a good bench press?
225 lb is a widely recognized bench press milestone, but there is
no universal “good” number. Body weight, experience, age, technique
and testing conditions all affect how a result should be interpreted.
Which formula should I use for bench press 1RM?
There is no universally best formula. Epley, Brzycki, Lander and
Lombardi can produce different estimates from the same set.
Comparing multiple estimates can provide useful context.
Can I use pounds or kilograms?
Yes. This bench press max calculator supports both pounds (lb) and
kilograms (kg). Switching units converts the entered weight before
calculating the estimate.
Why is my calculated bench max higher than my actual max?
Prediction formulas cannot account for every factor affecting a
heavy single. Technique, fatigue, range of motion, training
experience and individual repetition characteristics can all change
the relationship between a submaximal set and a true 1RM.
Should I test a true bench press 1RM?
A true 1RM directly measures performance under the test conditions,
while an estimated 1RM provides a practical submaximal alternative.
Heavy bench pressing should use appropriate technique, preparation,
equipment and safety precautions.