Statistics Calculators and World Data
124 calculators for coursework and research — t-tests, ANOVA, chi-square, correlation, regression, and the full set of descriptive statistics. Everything runs in your browser; your data never leaves your device.
Results are never just a bare number. Each one comes with the formula, a step-by-step solution, the related measures, and a sentence explaining what the result actually means — including whether a hypothesis test is statistically significant.
Popular calculators
All calculators →Weighted Mean Calculator
Enter your values and their weights to get the weighted mean instantly, along with the sum of…
StatisticsArea Calculator
Calculate the area of a square, rectangle, triangle, circle, or trapezoid: enter the lengths…
MathAnderson-Darling Test Calculator
A², adjusted A*², p-value, the 15%-1% critical value table, and a Kolmogorov-Smirnov comparison…
StatisticsANOVA Calculator
Paste one group per line and read the F statistic, degrees of freedom, p-value, eta squared…
StatisticsPrime Number Calculator
Check instantly whether a number is prime, and see its prime factorization, its divisors, how…
MathOutlier Detection Calculator
Identify the extreme observations in your data with the Tukey 1.5·IQR rule, the z-score, or the…
StatisticsExplore
World Data
Country populations, GDP rankings, life expectancy, and internet usage — with charts, full tables, and sources.
Countries
Profiles for 57 countries: economy, society, and military strength, each figure shown with its data year.
Compare
Put two countries side by side and see the percentage gap on every indicator.
Looking for Turkish data?
This site began as a Turkish statistics resource and still is one. The Turkish edition additionally covers population figures for all 81 provinces, inflation and exchange-rate series, country profiles, and side-by-side comparisons. Visit the Turkish edition →