One-rep max calculator
Estimate a maximum lift from a technically consistent set of 1 to 12 reps, then read off percentage-based training weights.
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Free training tools
Run a quick strength estimate, compare training volume, or start a workout log. Each tool shows its formula and its limits, and none of them asks for an account.
Tools
Estimate a maximum lift from a technically consistent set of 1 to 12 reps, then read off percentage-based training weights.
Open toolMultiply sets × reps × load for a single set, a session and a repeated weekly training pattern.
Open toolDownload a clean CSV with fields for exercises, sets, load, reps, effort, set type and notes.
Open toolLimits
From estimate to record
One number cannot show whether your technique, range of motion, effort and recovery stayed comparable between sessions. Keep the inputs next to the result so you can judge a change in context rather than react to it.
Read the workout logging guideGet the app
Jijibisha records your sets as you lift and turns them into records, weekly volume and estimated strength — without a spreadsheet.