How Scoring Tables Get Revised (And Why Versions Matter)

Version-first, always

Every ScoreIndexer tool shows the exact standard it uses — body, document, version year — and the date we last checked it. Where we cannot find a published value, we do not ship that event. The full list lives in our methodology version register.

Why versioned constants matter

A sports score is almost never a raw number. It is a raw number passed through a table of constants — coefficients, base times, rating factors — that a governing body has published. Those constants encode assumptions: the population fitted, the reference performances, the era. When a body reissues the table, the same raw input produces a different score.

That is the whole reason versions matter. A Wilks score computed with the 2015 coefficient set is not comparable to one computed with a later set, even for the identical lift at the identical bodyweight. Comparing across versions is comparing across different measuring instruments. Pinning a score to its version is the site’s core discipline, and it is why we treat “which table?” as a first-class question rather than a footnote.

Revisions you have already lived through

These changes are not hypothetical. Several of the standards our calculators use have been revised in living memory, and in more than one way:

Wilks was revised. The original Wilks coefficients were superseded by a recalculated set (commonly called Wilks-2), fitted to more recent performance data. Scores under the two sets differ, so the version has to travel with the number.
The IPF replaced its points entirely. In 2020 the International Powerlifting Federation retired its old points formula in favour of IPF GL points — a different model, not a tweak. Old and new IPF figures are not interchangeable at all.
WMA age-grade factors are reissued by year. World Masters Athletics publishes age-grade factor tables that are periodically re-derived; the correct factor depends on which year’s table you read, so an age-graded percentage is only meaningful against a named edition.
World Aquatics base times get re-based. The base (world-record-class) times behind swimming points tables are reset after championship cycles. The same swim earns fewer points once the base time has been lowered.
The WHS is updated by edition. The World Handicap System’s Rules of Handicapping are revised on a multi-year cycle, changing details of how a Handicap Index is built. The edition year tells you which rule set applies.

How can you tell which version is in use?

You rarely need to reproduce a full table to know which one you are looking at — you need the right signal. This is what to look for, by data set:

Data set	Body	How to identify the version in use
Powerlifting points	IPF	Whether it is labelled “Wilks”, “Wilks-2” or “IPF GL points”; GL points indicate the 2020-onward model.
Age-grade factors	WMA	The publication year printed on the factor table (e.g. the edition cited alongside the event and age).
Swimming points / base times	World Aquatics	The base-time year the points table is built on; re-based after major championship cycles.
Handicap rules	USGA / R&A	The edition year of the Rules of Handicapping the calculation follows.

Spotting an out-of-date calculator

The single most useful test is whether a tool tells you what it is using. A trustworthy calculator cites the body, the document, the version year, and a date it was last checked. If it does none of that, you cannot tell whether it is on the current table or one from a decade ago — and you should distrust its output accordingly.

Red flags: a Wilks calculator that never says Wilks or Wilks-2; an age-grade tool with no table year; a swimming points page with no base-time reference; a handicap tool that does not name the Rules of Handicapping edition. Silence about the version is itself the answer.

How we handle versions

Our practice is deliberately plain. On every tool we cite the body, the document, the version year, and the date we last checked it against the published source. When a body reissues a table, that becomes a change we make on purpose, recorded rather than absorbed silently.

All of that is collected in one place: the methodology version register, which lists each standard we rely on and the exact edition behind it. If a number on the site ever looks off against your own records, the register is where you confirm which table produced it.

Frequently asked questions

Can I compare a Wilks score from 2015 with one from 2021?

Not directly. The Wilks coefficients were revised (Wilks-2) and the IPF moved to GL points, so a score computed under one coefficient set is only comparable to other scores computed under the same set. Always match the version year before comparing.

How do I tell which version a calculator uses?

Look for an explicit citation: the publishing body, the document, the version or edition year, and the date the values were last checked. If a calculator does not state its version and a checked date, treat its output as unverifiable.

How often do these tables change?

There is no single schedule. Age-grade factor tables are reissued by year, aquatics base times are re-based after championship cycles, powerlifting points have been replaced outright, and the WHS is updated by edition. Each body publishes on its own timeline.

Reference

Methodology & version register

Every standard we use, with the body, document and edition year behind each calculator.

Tool

Wilks calculator

See the coefficient set named on the tool and the date we last checked it against source.

Sources

International Powerlifting Federation, IPF Technical Rules — IPF GL points model (2020) replacing earlier points. Checked 24 Aug 2026.
World Masters Athletics, WMA age-grade factor tables — reissued by edition year. Checked 24 Aug 2026.
World Aquatics, World Aquatics points tables — base times re-based after championship cycles. Checked 24 Aug 2026.
USGA & The R&A, Rules of Handicapping — edition updates to the World Handicap System. Checked 24 Aug 2026.