Relative Strength Ratio Calculator
Relative strength is how strong you are for your size: the weight you lift divided by your bodyweight. A back squat of 1.5 times bodyweight is a common intermediate benchmark, while elite lifters move multiples of their weight. Comparing lifts in relative terms is fairer across body sizes than absolute load. Enter the weight lifted and your bodyweight to get your relative strength ratio and the lift as a percentage of bodyweight.
Relative strength formula
Relative strength = weight lifted / bodyweight
Percent of bodyweight = ratio * 100
Use the same unit for both inputs
The ratio is unit-independent as long as both values use the same unit (kilograms or pounds). A ratio of 2.0 means you lifted twice your bodyweight.
Worked example
Lifting 140 kg at a bodyweight of 80 kg: relative strength = 140 / 80 = 1.75. As a percentage of bodyweight = 175.00 percent.
Frequently asked questions
What is a good relative strength ratio?
It depends on the lift and your training history. For a barbell back squat, roughly 1.0 to 1.25 times bodyweight is novice, 1.5 to 1.75 intermediate, and 2.0 or more advanced. Deadlifts are typically higher and overhead presses lower.
Why use relative strength instead of total weight?
Relative strength normalises for body size, allowing fairer comparison between lifters of different weights. A 60 kg lifter squatting bodyweight is performing similarly, in relative terms, to a 100 kg lifter doing the same.
Does the unit matter?
No, as long as both the lift and bodyweight use the same unit. The ratio is dimensionless, so kilograms and pounds give the same result provided you do not mix them.
Sources
- U.S. National Institutes of Health (MedlinePlus): exercise and physical fitness.
Reviewed by the CalculatorHub team, edited by James Graham, 19 June 2026. See our methodology.