Question 1

How do you calculate your one-rep max (1RM)?

Accepted Answer

Estimate your one-rep max from a weight you can lift for a known number of reps. Gym Log averages two proven formulas — Epley (weight × (1 + reps ÷ 30)) and Brzycki (weight × 36 ÷ (37 − reps)). Enter the weight and reps and it shows your estimated 1RM plus a training-percentage table. Estimates are most accurate at 1–10 reps.

Question 2

What plates do I put on each side of the bar?

Accepted Answer

Subtract the bar weight from your target, divide by two, and load the largest plates first. Gym Log's plate calculator does this automatically: enter the target total and bar weight (in lb or kg) and it lists the exact plates per side.

Question 3

Is Gym Log free and private?

Accepted Answer

Yes. Gym Log is free on the web with no account and no ads, and it runs entirely in your browser — your sets and data never leave your device. An optional one-time Pro unlock in the app adds unlimited logging and export.