About the Training Max Calculator
Training max for programmes like 5/3/1 — typically 85–90% of your true or estimated 1RM.
Also known as: 531 training max, tm calculator, working max.
How to use this calculator
- Enter one rep max, training max percentage, unit, round to nearest.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Training max = 1RM × 85–90%
Worked example
Using the values pre-filled in the calculator above:
- One rep max = 140
- Training max percentage = 90 %
- Unit: kg
- Round to nearest = 2.5
the calculator returns:
- Training max: 125 kg
- Unrounded: 126 kg