Before fielding a survey, one of the first questions to answer is: “How many people do we need to reach?” This calculator helps you determine the exact number of completed surveys required to achieve your desired level of precision, ensuring your data will be actionable without overspending your budget.
Sample Size Calculator
How to Use
- Population Size: Enter the total size of the universe you wish to study (e.g., all likely voters in a state).
- Click “Calculate” to generate a table showing the required sample sizes for margins of error ranging from ±1% (highly precise, more expensive) to ±10% (less precise, more affordable)
Why It Matters for Research
Balancing budget versus precision is a constant challenge in research. While a larger sample size reduces your margin of error, the returns diminish quickly after a certain point. This tool allows you to find the “sweet spot” for your specific race, ensuring you get reliable data to guide your decisions without wasting resources on unnecessarily large sample sizes.