Free tools
Survey calculators and planning tools
Use these free calculators to plan surveys faster, estimate statistical reliability, and reduce drop-off—then launch the survey in VividSurvey.
Use these free calculators to plan surveys faster, estimate statistical reliability, and reduce drop-off—then launch the survey in VividSurvey.
Estimate how many responses you need based on population, confidence, and margin of error.
Estimate your margin of error from sample size and confidence level.
Compute response rate from invites sent and responses received.
Compare two results and check whether the difference is statistically significant.
Estimate completion time based on question count/types to reduce drop-off risk.
Ready to launch? Build a survey in minutes with templates, logic, and real-time analytics.