Which Survey Calculator Should I Use?
The following calculators may be useful when conducting a survey. Each calculator computes one value, such as the confidence interval or survey size, given several other values.
- Simple Confidence Interval Calculator - Solves for confidence interval. There is no animation.
- Animated Confidence Interval Calculator - Solves for confidence interval, while displaying a nice animation. This page uses a java applet.
- Simple Sample Size Calculator - Solves for sample size for beginning and advanced users.
- Advanced Sample Size Calculator - Solves for sample size primarily for advanced users.
The Simple Sample Size Calculator is always the safe choice for computing the sample size. However, advanced users may choose the Advanced Sample Size Calculator for a smaller sample size, when the percentage can be estimated for a particular question. When in doubt, use the simple calculator!