Sample Size Calculator
sample_size_calculatorRead-onlyIdempotent
385 responses give ±5% at 95% confidence. Get the survey sample size for any confidence level, margin of error and proportion, with small-population correction. Web page: https://calcbright.com/sample-size-calculator
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| p | No | Expected proportion (%) Use 50% if unsure – it gives the largest, safest sample. | |
| conf | No | Confidence level | 95 |
| margin | No | Margin of error (±%) | |
| population | No | Population size Optional – leave blank for a large or unknown population. |