1RM Percentage Calculator: Training Weights
THE DRYDEN / STRENGTH TOOLS LIFT WITH PURPOSE
1RM PERCENTAGE CALCULATOR
Your max.
Every percentage.
Turn your one rep max into working weights for any percentage, rounded to the nearest plate.
Don’t know your max? Estimate it safely from a set of reps.
One rep max calculatorBEHIND YOUR NUMBER
A little understanding
goes a long way.
Which percentage should I use?
Strength work usually sits at 80–95% for 1–5 reps. Muscle building at 65–80% for 6–12 reps. Endurance and technique below 65%.
Why round the weights?
You can only load what your plates allow. We round to the nearest increment you choose, usually 2.5 kg or 5 lb.
Is this calculator for me?
It suits anyone who lifts, from beginners to experienced lifters. Results are estimates. Technique, sleep, food and stress all change what you can lift on the day. Always warm up and use a spotter or safety bars for heavy sets.
YOUR LIFTS. A CLEARER PLAN.Calculations happen on your device.