TempoLife › Features › One-rep-max estimator
One-rep-max estimator
One-rep-max estimator: estimates the one-rep max from any weight and rep count using several published formulas, and gives a load chart for every percentage.
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
Estimates the one-rep max from any weight and rep count using several published formulas, and gives a load chart for every percentage.
How to use it
Use One-rep-max estimator to understand the inputs, units and assumptions before relying on an output. A useful result should be reproducible from the named source rather than presented as an unexplained score.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | 1RM kalkulaator |
| Finnish | 1RM laskuri |
| Russian | 1ПМ калькулятор |
| English | one rep max calculator |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: Published one-rep-max formulas (Epley, Brzycki, Wathan). · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
rircalc starts from effort left; this starts from a completed set.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
Lift
Continue to the related TempoLife reference.
Bodycomp
Continue to the related TempoLife reference.
Why it belongs on TempoLife
The estimate links to /calculators and the TempoLife app.
Frequently asked questions
What does this guide cover?
Estimates the one-rep max from any weight and rep count using several published formulas, and gives a load chart for every percentage.
What evidence does it use?
Published one-rep-max formulas (Epley, Brzycki, Wathan).
Where does this guide stop?
rircalc starts from effort left; this starts from a completed set.
Turn the reference into a routine
TempoLife brings food, movement, sleep and everyday health habits into one private place when you want to track what happens next.