Ori ToolsHow to use
- Open One-Rep Max (1RM) Calculator and review the inputs below.
- Enter your values and check the units shown beside each field.
- Adjust the options, then press Run or Calculate. Interactive tools show their own start controls in the result area.
- Review the result. Use the copy or download control when it is available.
Inputs and starting values
| Input | Starting value / example | Available options |
|---|---|---|
| Weight lifted (kg) | 50 | |
| Reps | 5 |
Things to check
An estimate for adults. It is not a diagnosis, treatment or personal recommendation. Compares two common formulas. This is not advice to attempt a max lift.
The starting values are examples, not recommendations. Check the units and replace them with your own values.
Health estimates are for reference and cannot diagnose or replace medical advice.
Frequently asked questions
Are my inputs and files uploaded?
The tool processes inputs in your browser without uploading them. Browser storage, microphone or sensor permissions are described by the tool when applicable.