Working weight calculator

Brzycki formula: \( \text{weight} = \frac{1RM \times (37 – \text{reps})}{36} \)

Epley formula: \( \text{weight} = \frac{1RM}{1 + \frac{\text{reps}}{30}} \)

Lander formula: \( \text{weight} = \frac{1RM \times (101.3 – 2.67123 \times \text{reps})}{100} \)