How to Calculate Your Deadlift 1RM

By Emma Jenkins

Your deadlift 1RM is the heaviest deadlift you can pull once with sound technique — and
for most lifters, pulling a true maximal single is the most draining way to find it. One hard set,
stopped close to your limit, gives a formula enough information to estimate it. That estimate then
sets your training percentages, tracks your progress and makes fair strength comparisons
possible.

This guide explains what a deadlift 1RM means, how the estimate is calculated, how bodyweight
changes the picture, and how to get your own number in seconds with our free
Deadlift Calculator — no sign-up needed.

What Is a Deadlift 1RM?

A deadlift 1RM (one-rep max) is the maximum weight you can pull for a single repetition with
sound technique — bar breaking the floor under control, hips and knees extending together,
and a firm lockout standing tall with the bar held in both hands. It is the reference number
behind almost every deadlift decision: working weights are prescribed as percentages of it,
progress is measured against it, and comparisons between lifters start from it.

The deadlift has one feature no other big lift shares: every rep starts from a dead stop on
the floor. There is no stretch reflex helping you out of the bottom, which is part of why the
deadlift is, for most lifters, the heaviest lift they own. If the 1RM concept itself is new to
you, our guide on what one rep max means covers the general
principles; this page stays with the deadlift — how its 1RM is estimated, what influences
it, and how to put the number to work.

Actual vs Estimated Deadlift 1RM

There are two ways to arrive at a deadlift 1RM. An actual 1RM comes from a
true max test: you load the bar, work up to a maximal single, and the heaviest rep you complete
is your max for that day. An estimated 1RM comes from a submaximal set —
say 140 kg for 5 reps — converted by a formula into the single you could likely
pull.

Criteria	Actual 1RM	Estimated 1RM
How you get it	True maximal single attempt	Formula from a hard set of 2–10 reps
Effort and fatigue	Very high; heavy deadlifts carry the longest recovery cost of the big lifts	Normal hard training set
Best used for	Competition attempts and final proof	Planning training and tracking progress
Accuracy	Exact for that day	A close prediction; exactness varies with reps, grip and technique

An estimate is not a guess and not a pretend max — it is a prediction with a known
margin of error. For the deadlift it is usually the more practical number, because max singles
cost more recovery here than in any other lift, and you can produce an estimate inside a normal
session without paying that price.

Why Calculate Your Deadlift 1RM?

A dependable deadlift 1RM turns effort into a plan. Most deadlift programs assign work as
percentages of 1RM, so the number directly decides how heavy your training sets are: estimate
too high and every set becomes a grind your lower back pays for all week; too low and the work
stops driving progress.

It is also the cleanest progress check you have. If the same weight that once limited you to
five reps now moves for seven, your estimated 1RM has risen — objective proof of progress
without ever loading a maximal single. And because the deadlift is usually the biggest
contributor to a powerlifting total, its 1RM is the number competition attempt selection is built
around.

Two companion tools pair naturally with it: the
One Rep Max Calculator covers any barbell lift, while the
RPE Calculator lets you adjust when a set feels heavier or lighter than
the plan assumed.

How Deadlift 1RM Is Calculated

Every estimate begins with two inputs: the weight you deadlifted and the
repetitions you completed with it. Established formulas then project that set
onto a maximal single. Three of the most widely used are Epley, Brzycki and Lombardi:

Formula	Calculation
Epley	Weight × (1 + Reps ÷ 30)
Brzycki	Weight × 36 ÷ (37 − Reps)
Lombardi	Weight × Reps0.10

On low-rep sets the formulas sit close together; as the reps climb, they drift apart. That is
why the quality of the set you feed them matters more than the formula you choose. A hard set of
roughly 3–8 reps, pulled close to your limit with each rep reset on the floor, gives the
most dependable estimate. Long touch-and-go sets mix conditioning and rebound into the result,
and formulas built on them tend to flatter your true single.

Whatever the formula, remember what the output is: an estimate — a predicted single, not
a proven one. Treat it as a planning number: solid enough to load training from, honest enough
to deserve a margin of safety.

Deadlift 1RM Example

Say you deadlift 140 kg for 5 solid reps, each one reset on the floor.
Here is the estimate, step by step:

1. Take the weight lifted: 140 kg.
2. Take the repetitions completed: 5.
3. Apply a formula. Epley: 140 × (1 + 5 ÷ 30) = 163.3 kg.
4. Cross-check. Brzycki gives about 157.5 kg and Lombardi about
   
   164.4 kg for the same set.
5. Plan around the result: an estimated deadlift 1RM of roughly 158–164 kg.

The three formulas land within about six kilos of each other because five reps sits in the
range where estimates behave well. That cluster is your working answer — the number you
would base percentages and progress checks on — and you would only test a true single if
competition or curiosity called for one.

How Bodyweight Relates to Deadlift Strength

An absolute deadlift number tells only half the story. A 163 kg pull means something
different on a 70 kg lifter than on a 110 kg lifter, which is why strength is often
expressed relative to bodyweight: deadlift 1RM divided by your bodyweight. The 90 kg lifter
in our example, with an estimated 163 kg pull, sits at about 1.8× bodyweight. A
70 kg lifter with the same deadlift would be at roughly 2.3× bodyweight — the
same bar weight, a very different feat.

The deadlift also has a reputation for rewarding long arms and strong leverages: two lifters
of identical size can differ noticeably in what they can pull because of how they are built.
Relative strength explains a familiar gym pattern too: lighter lifters often post bigger
bodyweight multiples, while heavier lifters usually win on absolute weight. Neither view is the
“correct” one — they answer different questions. Absolute 1RM decides your
training loads; relative strength lets you compare fairly across sizes and judge whether you are
getting stronger for your size as your weight changes.

How to Use a Deadlift Calculator

The Deadlift Calculator does the formula work for you:

1. Pull a hard set — ideally 3–8 reps, close to your limit, each rep reset on the floor with the same grip and stance you trained.
2. Open the calculator and enter the weight you deadlifted.
3. Enter the repetitions you completed.
4. Press Calculate to see your estimated deadlift 1RM.
5. Use the result to set training percentages and to re-test against in a few weeks.

It is free, needs no sign-up, and works the moment your set is done — while the effort
is still fresh and the numbers are honest.

Deadlift Strength Standards

Standards answer a different question: not “what can I pull?” but “how does
that compare?” Published standards tables typically group lifters by bodyweight — and
often by sex and age — then place a deadlift into experience bands such as beginner,
novice, intermediate, advanced and elite. Deadlift numbers run higher than squat and bench
numbers in those tables for most lifters, because the deadlift moves the most weight.

Two things are worth knowing. First, the cut-offs are conventions, not laws of nature:
different tables draw the lines in different places, because they are built from different
lifting populations. Second, an estimated 1RM belongs in these comparisons just as an actual max
does — most people simply never test a true single.

You can see how your number stacks up on our
strength standards page, which lays out the categories used on
this site.

Deadlift and Overall Strength

Overall strength is usually judged across the big three lifts together:
squat, bench press and deadlift. For most
lifters the deadlift is the heaviest of the three — the largest single contributor to a
powerlifting total — though build, leverages and training history can narrow those gaps
considerably.

That is why a single-lift number is only part of the picture. Our
Strength Level Calculator combines your lifts with your
bodyweight into one overall strength view, and our guide on
how to calculate your strength level explains how that score is
built. Developing all three lifts in balance is what moves the overall number — a lagging
deadlift in that picture is a useful signal for where the next training block should focus.

Limitations of Estimated Deadlift 1RM

Formulas are honest predictors, but the deadlift has edges you should know:

• High reps drift. Estimates are tightest on sets of about 2–8 reps.
  
  Beyond 10 reps, conditioning and grip endurance influence the set as much as strength, and
  
  formulas increasingly overestimate.
• Grip changes the number. A mixed grip, hook grip, chalk or straps can each
  
  change what you can hold onto. A set pulled with straps may estimate a max your bare grip could
  
  not hold — feed the calculator sets that match how you would test.
• Dead-stop vs touch-and-go. Reps reset on the floor are harder than reps
  
  bounced off it. A touch-and-go set inflates the estimate beyond what a dead-stop single would
  
  allow, so keep the style consistent between tests.
• Stance is not interchangeable. Conventional and sumo deadlifts load the body
  
  differently and suit different builds. An estimate from one stance does not transfer cleanly to
  
  the other.
• Fatigue hits the deadlift hardest. Heavy pulling taxes the whole posterior
  
  chain, so leftover fatigue from earlier training can hold a set down — and the estimate
  
  reflects the day the set happened, not your freshest day.

Used with those limits in mind, an estimated deadlift 1RM is accurate enough for its real
job: loading the bar sensibly and proving, month after month, that you are getting stronger.

Frequently Asked Questions

What is a deadlift 1RM?

It is the heaviest weight you can deadlift for one repetition with sound technique, pulled from a dead stop on the floor to a full standing lockout. Most lifters use an estimated deadlift 1RM, calculated from a hard submaximal set, rather than testing a true maximum single.

How do I calculate my deadlift 1RM without maxing out?

Deadlift a hard set of about 3–8 reps, note the weight and reps, then apply a 1RM formula such as Epley — weight × (1 + reps ÷ 30) — or enter the set into the Deadlift Calculator, which does it instantly.

Which deadlift 1RM formula is best?

No formula is universally the most accurate for every lifter. Epley and Brzycki are the most widely used and agree closely on low-rep sets; the differences only grow on high-rep sets. Using the same formula each time keeps your progress tracking consistent.

How many reps should I use to estimate my deadlift 1RM?

A hard set of roughly 3–8 reps, taken close to your limit with each rep reset on the floor, gives the most dependable estimate. Sets above 10 reps reflect conditioning and grip endurance as much as strength, so estimates from them tend to run high.

Is an estimated deadlift 1RM accurate?

It is a close prediction rather than a proven max. On low-rep sets, good formulas usually land within a few percent of a tested single — more than accurate enough to set training percentages and track progress. Keep grip, stance and rep style consistent so estimates stay comparable.

How often should I check my deadlift 1RM?

Whenever your top sets change meaningfully, or at the end of each training block. Because the estimate comes from normal hard training, you can refresh it every few weeks without the recovery cost of a dedicated max-test session.

Does my stance change my deadlift 1RM estimate?

Yes. Conventional and sumo deadlifts suit different builds and load the hips, back and legs differently, so most lifters are stronger in one than the other. Estimate and test in the same stance you train, and do not carry an estimate from one stance over to the other.

What is a good deadlift 1RM?

It depends on your bodyweight, training age and goals, so there is no single number. Standards tables place deadlifts into bands from beginner to elite for lifters of similar size; check the strength standards page to see where yours currently sits and what the next band looks like.