Question 1

Why are some weights rounded?

Accepted Answer

Barbells can only be loaded in specific increments — typically 5 lb or 2.5 kg. Rounding to the nearest loadable weight ensures the number on the table is something you can actually put on the bar.

Question 2

Should I always use my true 1RM?

Accepted Answer

You can use a tested 1RM or an estimated one from the One-Rep Max Calculator. Many programs use a "training max" that is 90% of your actual 1RM to allow for daily fluctuation. Enter whichever number your program specifies.

Question 3

What if my program uses percentages not on the table?

Accepted Answer

The table covers 50% to 100% in 5% steps. For other percentages, multiply your 1RM by the decimal yourself and round to the nearest 5 lb or 2.5 kg.

Question 4

Is the rounding always up or down?

Accepted Answer

The calculator rounds to the nearest increment, standard rounding. A value of 52.5 lb rounds to 50 lb, 57.5 lb rounds to 55 lb. This keeps you as close as possible to the true percentage.

% of 1RM	Loadable	Exact
50%	150 lb	150 lb
55%	165 lb	165 lb
60%	180 lb	180 lb
65%	195 lb	195 lb
70%	210 lb	210 lb
75%	225 lb	225 lb
80%	240 lb	240 lb
85%	255 lb	255 lb
90%	270 lb	270 lb
95%	285 lb	285 lb
100%	300 lb	300 lb

Percentage of 1RM Table

How It Works

Worked Example

Frequently Asked Questions

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One-Rep Max Calculator

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