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Lean Body Mass to Strength Calculator

Predict your squat, bench and deadlift from lean mass, and score how much of that potential you've realised.

Related tools

All Strength training tools →
Strength Standards CalculatorWhere your squat, bench, deadlift or press lands from untrained to elite for your bodyweight.Army Body Fat CalculatorThe US Army AR 600-9 tape method, with the pass/fail limit for your age band.Body Recomposition CalculatorMaintenance calories, protein target and an honest feasibility score for losing fat while gaining muscle.Lean body mass calculatorEstimate your lean body mass and fat mass from weight, height and sex.Bench Press CalculatorYour bench 1RM, the load for every rep range, and where it sits against your bodyweight.FFMI CalculatorFat-free mass index — the muscularity measure that height-corrects where BMI cannot.Lift percentage of 1RM calculatorFind the weight to load for a given percentage of your one-rep max.One-rep max (1RM) calculatorEstimate your one-rep max from a weight lifted for several reps (Epley formula).

Open Lean Body Mass to Strength Calculator and you get an answer straight away, with no account to create. You will find it under Strength training, with Strength Standards Calculator and Army Body Fat Calculator for the neighbouring cases.

How to use it

  1. Open the tool — no signup or install needed.
  2. Enter your input or adjust the available options.
  3. Get your result instantly, then copy or download it.

Frequently asked questions

What does Lean Body Mass to Strength Calculator do?

Predict your squat, bench and deadlift from lean mass, and score how much of that potential you've realised.

When would I actually use this?

Programming a block: estimating a one-rep max without testing it, setting working loads as a percentage of it, and tracking whether volume is actually going up.

What is the most common mistake?

Estimating a one-rep max from a high-repetition set. The formulas hold to about five reps; beyond ten they drift badly, because endurance starts to dominate strength.

How is Lean Body Mass to Strength Calculator different from Strength Standards Calculator?

They sit next to each other but answer different questions: Strength Standards Calculator is the one to open when you need it to where your squat, bench, deadlift or press lands from untrained to elite for your bodyweight. Pick whichever matches what you're starting from — both are free.

Is there a tool for the next step?

Army Body Fat Calculator is the closest one after this: The US Army AR 600-9 tape method, with the pass/fail limit for your age band.

What else is worth having open alongside it?

Body Recomposition Calculator and Lean body mass calculator — they come up in the same task often enough to be worth a second tab.

Where do the figures come from?

The estimates use the published Epley and Brzycki equations, which the tool names. They were derived on trained lifters and describe a population, not your best day.

Further reading

All guides →
GuideStrength Standards: What Counts as Strong, in Multiples of BodyweightA 176 lb man benching 220 lb is intermediate, not strong. Here are the usual bodyweight multiples for bench, squat and deadlift, and why the labels mislead more often than they help.ExplainerFFMI: The Number BMI Cannot Give YouBMI weighs you and divides by your height squared. It cannot tell muscle from fat, which is why lean athletes get classed overweight. FFMI removes the fat first — and inherits every error in the body-fat estimate it is built on.How-toHow to Train With Percentages of Your 1RMPercentage-based training scales every lift to your one-rep max. Learn the strength and hypertrophy zones and how to set your working weights.ComparisonOne-Rep Max Formulas Disagree, and the Disagreement Is the PointEpley, Brzycki, Lombardi, O'Conner and Wathan are five curves through the same data. They agree within a few pounds at low reps and disagree by a quarter at fifteen — which is exactly how you know when an estimate is worth having.How-toHow to Estimate Your One-Rep Max (1RM)Your one-rep max is the most you can lift once. Here's how to estimate it safely from a lighter set, how accurate it is, and how to train with it.How-toHow to Calculate a Wilks Score to Compare Powerlifting TotalsUse the Wilks coefficient to compare powerlifting totals fairly across bodyweights, so a lighter and heavier lifter can be ranked.