Standard Deviation
Spread of up to five values.
How it works
Spread of up to five values. The result updates as you type and nothing leaves your browser.
Is it free?
Yes — no account and no ads.
How precise is it?
Standard factors and formulas; results are rounded to two decimals.
More math calculators
Percentage CalculatorX% of Y, what percent X is of Y, and percentage increase or decrease.
Triangle CalculatorArea, perimeter and type from three sides (Heron’s formula).
Circle CalculatorArea, circumference and diameter from one value.
Scientific CalculatorTrigonometry, logs, powers, roots and factorials with DEG/RAD.