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Survey Sample Size Calculator

Calculate the sample size you need for statistically significant survey results. Free, instant, and accurate.

370
Required Sample Size
responses needed for statistically significant results
Population
10,000
Confidence Level
95%
Margin of Error
±5%

How This is Calculated

Sample Size = (Z² × p × (1-p)) / E²
Where Z = 1.96 (for 95% confidence), p = 0.5 (maximum variability), E = 0.05

Tips for Better Response Rates

  • • Keep surveys short (under 5 minutes)
  • • Offer incentives for completion
  • • Send reminders to non-respondents
  • • Mobile-optimize your survey
  • • Explain why their feedback matters

Track This Metric Automatically

Stop calculating manually. Boost Toad automatically tracks your feedback metrics over time with beautiful dashboards.

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About This Calculator

This free calculator helps you quickly calculate and understand your metrics. All calculations happen in your browser - we don't store any of your data. Perfect for quick calculations or one-time analysis.