The world's best e1rm calculator is now even besterer.
Simplified and polished calculator UI
- Cleaner layout and spacing
- Improved readability of labels and controls
- Better mobile/desktop behavior across the page
- New all-in-one E1RM algorithm slider/line
Replaced the old formula radio-style selection with a visual comparison bar
- Shows all supported E1RM formulas on one line
- Lets you quickly compare estimates and tap/click a formula to select it
- Improved mobile label merging and popover interactions so crowded labels stay usable
- Automatic Big Four strength ratings (always visible)
Your estimated 1RM now automatically shows strength level ratings for:
- Back Squat
- Bench Press
- Deadlift
- Overhead Press
Ratings are benchmarked using your athlete bio data (age, sex, bodyweight)
UI was refined with better tooltips/popovers, layout, and inline bio settings
Two new programming tables
- Rep Max Projection Table(projects estimated weights across rep ranges)
- Percentage Table(100% down to lower percentages for programming)
These make the calculator more useful for planning sets, percentages, and training blocks
Copy / Share Improvements
- Improved copy result UX(clearer success feedback)
- Addedper-lift copy buttonson Big Four strength bars
- Copied text now includes more useful context (including shareable calculator link)
Supported E1RM Algorithms (all shown in the comparison slider)
- Brzycki
- Epley
- McGlothin
- Lombardi
- Mayhew
- OConner
- Wathan
Strong friends don't let friends use any other calculators.