Calculate Standard Deviation for iPhone

Standard Deviation Made Simple

Use this handy calculator to compute the standard deviation and variance of any data set quickly. Designed with simplicity in mind, the tool makes it easy to analyze how spread out your values are without dealing with complex formulas. It works well with large lists of numbers and gives precise statistical output in just a few steps.

What the calculator measures

Standard deviation quantifies how much individual data points differ from the mean: a small value means points cluster close to the average, while a large value means they are widely spread. The app also computes variance and can help you assess the mean absolute deviation when needed.

Key capabilities

• Supports large data sets for reliable results on bigger samples
• An expanding input field that grows as you add more entries
• Easy, intuitive interface that reduces the chance of input errors
• A numeric keyboard with a repeat-key for entering the same value multiple times
• Accurate calculations that remove the need to manually apply formulas

Benefits of using this tool

• Saves time by producing results with a few clicks
• Makes statistical concepts accessible for beginners and non-experts
• Reduces manual calculation errors for improved reliability
• Provides both dispersion measures and summary information in one place

Alternate option to consider

If you’re looking for another resource, try Cool Math Flash Cards — a free alternative that can help reinforce statistical concepts and practice calculations in a flash-card format.