Home » One-Rep Max CalculatorOne-Rep Max Calculatorby Calculator DnaJuly 22, 2025July 22, 2025 One-Rep Max (1RM) Calculator | Strength Training Tool Calculate Your One-Rep Maximum 1RM Calculator Weight Lifted Repetitions Performed Kilograms (kg) Pounds (lbs) Calculate 1RM Clear Your Estimated One-Rep Max 0 Based on the average of multiple scientific formulas Google Acreage Calculator