Fitness Goal 4U

Deadlift 1RM
Calculator

Assess your one-rep max for the deadlift using weight lifted, repetitions, and training data. Get a clear, practical result to track lower body strength progress and plan your workouts.

Basic Deadlift 1RM Calculator
Transparent FormulasMetric and ImperialCalculated Locally

Deadlift One-Rep Max

Free Calculator
1RM
Lifted weight140 kg
Completed repetitions5 reps
Primary methodEpley
Deadlift 1RM Result ExplainedNo Black Boxes
Updated 12 Aug 2026Free Deadlift 1RM Calculator

Calculate with Deadlift 1RM Calculator

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Complete the fields and calculate. Your inputs stay on this device.

Purpose and context

What does the Deadlift 1RM Calculator do?

Deadlift performance is sensitive to start position, straps, touch-and-go repetitions and fatigue. Use the same convention when comparing estimates.

Who it supports: Adults performing consistent deadlift technique.

Transparent calculation

Formula and calculation method

Epley and Brzycki repetition-based 1RM equations

The shared engine calculates both predictions from deadlift load and repetitions and derives the percentage table from the selected method.

Primary keyworddeadlift 1RM calculator
Result typeCalculator-specific result
Published
Last reviewed

Worked calculation example

A 140 kg deadlift for 5 reps gives an Epley estimate of about 163.3 kg.

The live calculator retains greater internal precision and rounds only when presenting the result.

How to use the Deadlift 1RM Calculator

  1. Choose a consistent deadlift variation and repetition standard.
  2. Enter load and valid reps.
  3. Review equation spread before programming from the estimate.

Understanding your result

The result card identifies the value, unit, method, supporting values and an accuracy notice. Estimated and predicted outputs are labelled so that apparent precision is not mistaken for certainty.

Continue with the 1RM Calculator for a related measurement using its own documented method.

Accuracy, assumptions and limitations

Rep style, equipment, grip, fatigue and individual endurance influence the relationship between a repetition set and true maximum.

Common input and interpretation mistakes

  • Mixing touch-and-go and reset repetitions.
  • Comparing strapped and unstrapped sets without context.
  • Testing a predicted maximum while fatigued.

Primary method source: https://pubmed.ncbi.nlm.nih.gov/15320682/.

Fitness Goal 4U provides general informational calculations and does not replace medical assessment, diagnosis, treatment or individualized advice from an appropriately qualified professional.

Frequently asked questions about Deadlift 1RM Calculator

They can change performance, so use one repetition standard consistently.

Treat them as separate exercise variations because leverages and performance can differ.

Yes. Straps or supportive equipment can change the limiting factor and should be recorded.

Equation error, fatigue, technique and psychological readiness all influence a maximal attempt.

Related calculators

These tools are connected by calculation purpose, inputs or the next question users commonly ask.

1RM CalculatorEstimate one-repetition maximum from a technically sound submaximal set and compare Epley and Brzycki predictions. Squat 1RM CalculatorEstimate squat one-repetition maximum from a controlled set and view squat-specific training percentages. Bench Press 1RM CalculatorEstimate bench press one-repetition maximum from a controlled set and compare two recognized prediction equations. Training Max CalculatorCalculate a programming reference from an actual or estimated 1RM and a selected percentage.