Standard Deviation Calculator
Population and sample standard deviation and variance.
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About the Standard Deviation Calculator
Standard deviation measures how spread out numbers are from the mean. The calculator gives both population (σ) and sample (s) standard deviation and variance, with each step shown.
Which one?
- Population: you have every value in the group
- Sample: your data is a sample from a larger group (divides by n − 1)
Useful for statistics courses, lab results, quality control and finance.
اسٹینڈرڈ ڈیوییشن
یہ بتاتا ہے کہ اعداد اوسط سے کتنے بکھرے ہوئے ہیں۔ آبادی (σ) اور نمونہ (s) دونوں اور ویریئنس مراحل کے ساتھ۔
- شماریات اور لیب رزلٹس کے لیے
- نمونے میں n − 1 سے تقسیم
How to use Standard Deviation Calculator
- Enter your values. Units and defaults are shown beside each field.
- Press Calculate (results also update as you type once calculated).
- Read the result and the step-by-step breakdown with the formula used.
- Copy the result or reset to start again.
Frequently asked questions
How accurate is this calculator?
Calculations use the standard formulas shown on the page, computed in full precision and rounded only for display. The result is only as accurate as the inputs and assumptions listed.
Is it free?
Yes. All tools are free to use without an account.