One-Rep Max Calculator (Mayhew Formula)
Estimate your one-rep max with the Mayhew formula, validated for the bench press. Generates a percentage chart for training prescription.
Estimated 1RM (Mayhew)
267.8 lbs
Weight Used
225 lbs
Reps Performed
5
Percentage Chart
95%: 254 lbs
90%: 241 lbs
85%: 228 lbs
80%: 214 lbs
75%: 201 lbs
70%: 187 lbs
65%: 174 lbs
60%: 161 lbs