Weight Training Calculator 1.0

How much weight did you lift?

How many repetitions did you perform?

Your predicted 1RM according to the Brzycki Formula¹ is .

If you subscribe to H.I.T., then you should use a weight of for one set of eight to twelve repetitions.

1 A Practical Approach to Strength Training by Matt Brzycki

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The following is provided if you wish to do the calculations manually.

Instructions

If you can lift 200 lbs. eight times, for example, divide 200 by the coefficient corresponding to eight repetitions, which in this case is 0.8054. The answer is the predicted One Repetition Maximum (1RM), in this example, of 248 lbs.

Conversely, if you wish to perform five repetitions in a given set and would like to use the 'optimum' weight, then multiply the coefficient corresponding to five repetitions, in this case 0.8888, by your 1RM. If you have a 1RM of 300 lbs., then your working weight with five repetitions in this case is 267 lbs.