1. I have one remark, in the “One Rep Max Results” table, i believe “Repetitions of 1RM” is a little bit confusing, since that column represents repetitions of “percentages of 1RM”, not just “1RM”

2. and something to share, not an issue report: for fun, i managed to get a good approximation of your calculator with this formula:
1RM = Weight_Lifted * (Reps_Performed + 28) / 29
it’s not perfectly matching, but i understand it doesn’t have to be, especially when repetitions are always rounded off (since integers)

resulting in a formula for the recommended repetitions correlated to “Percentage of 1RM” (as under unit fraction):
Repetitions = 29 / Percentage_of_1RM – 28, (rounded off)

seems to work fine, consistent your data, with the highest deviation at 75% (the reason for your Calculator asking for max 10 reps maybe? the 1RM formula was calibrated with the extremes, at 50% and 100%); so guess my question is : is the input limitation to 10 Reps having something to do with the nonlinearity of the formula or is there something more i might be missing?

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NOTE: no need to publish this reply, my main incentive was to let you know about the first point, in case it’s really a mistake.

Thank You,
Have a nice weekend!