1RM Percentage Calculator
Calculate a training weight from one-rep max and the percentage you want to lift.
How to use 1RM Percentage Calculator
1. Enter One-Rep Max, Training Percentage, Weight Unit. 2. The percentage is your arithmetic input, not a recommended training intensity. Values above 100 remain explicit hypothetical quantities. 3. Select Calculate or press Enter. 4. Select Copy result to copy the answer, or Reset to clear the form and result.
Why use this tool?
The percentage is your arithmetic input, not a recommended training intensity. Values above 100 remain explicit hypothetical quantities.
How the calculation works
Reference weight × entered percentage ÷ 100. The percentage is your arithmetic input, not a recommended training intensity. Values above 100 remain explicit hypothetical quantities. This quantity displays up to two decimal places where applicable. Durations round to the nearest second; nonzero subsecond durations are labelled. Changing unit labels does not convert entered quantities.
Example
Worked example: One-Rep Max = 120; Training Percentage = 70; Weight Unit = "kg". Result: 84 kg.
Practical tip
Keep the strength set inputs on one clearly defined measurement, scoring or counting basis.
Frequently asked questions
What does 1RM Percentage assume?
The percentage is your arithmetic input, not a recommended training intensity. Values above 100 remain explicit hypothetical quantities.
Are results a recommendation or live sports record?
No. This calculates the stated model from entered values. It does not fetch results, decide a safe training programme or apply unstated competition rules.
How are units, counts and rounding handled?
Actual entity counts must be whole. Selected units label matching inputs and outputs without converting entered quantities. Durations round to the nearest second; percentages to two decimals; stated averages use their documented precision. Very small non-zero values are labelled instead of being shown as zero.