Statistics Calculators
Statistics calculators and planning tools
1 Calculators
Instant Results
Free to Use
mathematics & sciencestatisticssample size calculator
About Statistics Calculators
Analyse data with free statistics calculators. Work out mean, median, mode, standard deviation, sample size, and more.
Statistics turns raw numbers into insight. These tools handle the formulas so you get correct results for study, work, or research.
Frequently Asked Questions
How do I calculate standard deviation?▼
The standard deviation calculator computes both population and sample standard deviation from your data set.
What sample size do I need?▼
The sample size calculator estimates the responses needed for a target confidence level and margin of error.
Are these tools free?▼
Yes — all statistics calculators are free and need no account.