Calculators for people who run selection processes
Small, single-purpose tools with the working shown and the sources cited. No signup, no email wall, and no data leaves your browser — every calculation here runs client-side.
Adverse impact ratio calculator
Selection rates, impact ratios, a four-fifths flag, a two-proportion significance check and the shortfall to reach 0.80.
Open the calculatorSample size & reliability calculator
A Wilson interval on your pass rate, the sittings needed to reach a target precision, the standard error behind one score, and the odds a candidate near the cut is on the wrong side of it.
Open the calculatorAngoff cut score calculator
The panel's cut score with its standard error, the items the judges disagree on, and — the part other calculators leave out — what that cut does to your candidates.
Open the calculatorSelection utility calculator
How many of your hires will work out, given your base rate, your selection ratio and the instrument's validity — plus what that is worth, and the validity you would need to break even.
Open the calculatorDifferential item functioning (DIF) calculator
The Mantel–Haenszel odds ratio, MH D-DIF, the chi-square and the ETS A/B/C category for one item — plus the crossing check and the sample-size gate the single number hides.
Open the calculator