FITNESS TOOL
1RM Calculator
1RM is the heaviest weight you can lift once. Estimating from a 3-10 rep set is more reliable; this tool shows Epley, Brzycki, Lombardi and their average, plus 60-100% reference loads. An estimate is not a max-out test; use a spotter or safety rack for heavy loads.
1RM is an estimate, not a max-out test; use a spotter/rack for heavy loads and consult a clinician for pain or injury.