What is the Lombardi formula for 1RM?

1RM = weight × reps^0.10. For 60kg lifted 15 times: 1RM = 60 × 15^0.10 = 60 × 1.279 = 76.7kg.

Is the Lombardi formula better for high rep sets?

Yes — the Lombardi formula tends to produce more reasonable estimates at 12–20 reps where linear formulas increasingly overestimate by assuming rep-speed remains constant.

1RM Calculator — Lombardi Formula

Calculate one-rep max using the Lombardi formula: weight × reps^0.10. A power-law based equation that performs well at higher repetition ranges (10–20 reps).

1RM Lombardi

Calculate one-rep max using the Lombardi formula: weight × reps^0.10. A power-law based equation that performs well at higher repetition ranges (10–20 reps).

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Enter values above and press Calculate to see the result.

How It Works

Calculate one-rep max using the Lombardi formula: weight × reps^0.10. A power-law based equation that performs well at higher repetition ranges (10–20 reps)

Each component has a specific meaning:

Lombardi formula: weight × reps^0 — The lombardi formula: weight × reps^0 recorded for the scenario being assessed.

Note: Interpret the 1rm lombardi result against the thresholds and context described above.

How to Use

Enter the Lombardi formula: weight × reps^0 for the scenario you are assessing. Calculate one-rep max using the Lombardi formula: weight × reps^0.10. A power-law based equation that performs well at higher repetition ranges (10–20 reps). Use the 1rm lombardi result to inform your calculation.