FREE · NO SIGNUP · NOTHING STORED
Free tools for lifters.
The same maths the Antaeus app runs, on a web page. Use them without installing anything.
1RM CALCULATOR
One-rep max calculator
Estimate your max from any set, plus the full percentage table.
TDEE CALCULATOR
TDEE and macro calculator
Maintenance calories and macros, with protein set off lean mass.
STRENGTH STANDARDS
Strength standards
Grade five lifts by bodyweight ratio and find your weakest link.
PLATE CALCULATOR
Barbell plate calculator
Per-side loading from your real plate inventory, in kg or lb.
These answer once. The app keeps answering.
A calculator takes what you type. Antaeus reads what you have actually logged — then writes the next session, adjusts the volume to your recovery, and tells you when something has stalled.
Join the beta See how it works