Formula
Epley equation: 1RM = training weight × (1 + repetitions ÷ 30).
Health & Body · Tool 615 of 200,000
One-Rep Max Estimator
Enter your values for a transparent, reproducible one-rep max estimator, with the formula and scope shown.
LiveScenario estimateLocal calculationUS · USD
Your inputs
Enter real numbers
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Live result
Estimated one-rep max (1RM)
223.3 lb
The Epley equation is generally more informative at lower repetition counts.
- Training weight at 80%
- 178.8 lb
- Training weight at 70%
- 156.3 lb
- Training weight at 60%
- 134 lb
Reproducible, not guessed
How was this calculated?
Scope
Use values that match your situation and location. Verify rule-based, contractual, financial or health decisions against an authoritative local source.
Model context
localeen-UScountryUScurrencyUSDtimezoneAmerica/New_Yorkunit_systemimperialrules_versionus-2026.08source_languageen-US
Results are for first-pass estimates and scenario comparison. Important tax, employment, health and investment decisions should be verified against local official guidance or a qualified professional.