Research calculators

Planning a study means answering practical questions before the first participant is invited. How many responses does a survey need? What should participants be paid? What will the study cost per interview, how long will it take, and is it worth running for the decision at stake?

These free calculators answer those questions. Each one shows its formula and a worked example, most add a table of common values, and every one works without signing up. The sample size calculator applies the standard formula for survey precision. The incentive calculator budgets participant payments with an allowance for no-shows. The cost per insight calculator adds up what a study costs, from fees and incentives to the team's hours, and the time to insight calculator adds up how long it takes, stage by stage. The research ROI calculator weighs a study's cost against the value of the decision it informs.

Each page also explains how to choose the inputs and what the number leaves out.