Bench Press Estimation Formula:
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This calculator estimates your one-repetition maximum (1RM) bench press based on the number of push ups you can perform and a conversion factor that accounts for body weight and strength transfer between exercises.
The calculator uses a simple formula:
Where:
Explanation: The factor accounts for the percentage of body weight lifted during push ups (typically 60-75% of body weight) and the strength transfer to bench press.
Details: Estimating your bench press 1RM helps with program design, tracking strength progress, and setting appropriate training weights without needing to test your true 1RM which can be risky.
Tips:
Q1: How accurate is this estimation?
A: It provides a rough estimate. Actual bench press can vary ±20% based on individual biomechanics and training specificity.
Q2: What's a typical conversion factor?
A: Most untrained individuals use 0.30-0.35, while trained individuals may use 0.35-0.40.
Q3: Why doesn't it ask for body weight?
A: The conversion factor implicitly accounts for body weight. Heavier individuals generally can do fewer push ups but may bench press more.
Q4: Does push up form affect the calculation?
A: Yes. Only strict, full range-of-motion push ups should be counted for accurate estimation.
Q5: Can I use this for other exercises?
A: No, this is specific to the push up to bench press relationship. Other exercises require different formulas.