The home of
quant research.
Free calculators and practical guides, built for market and social researchers.
The quant tools you need, all in one place.
Margin of Error
How precise is your survey result? Get the range within which the true answer likely falls.
CalculatorSignificance Tester
Is the difference between two results real, or just noise? Test any two percentages.
CalculatorBatch Significance Test
Paste coded data from two waves and instantly flag every significant change.
CalculatorEffective Sample Size
Weighted data isn't worth its full n. Find out what your sample is actually worth statistically.
CalculatorWeighting Grid Builder
Generate population targets from live ONS Census data. Select geography and variables, enter your sample, get weight factors.
Coming soonB2B Weighting Grid
Population targets for business surveys. Filter by size band, sector and region using official UK business population data.
Coming soonMore coming soon
Crosstab builder, subgroup sample size calculator, and more.
Practical guides for everyday research tasks.