Geometry & Statistics Calculators
Solve geometry and statistics problems with calculators for area, volume, triangles, and shapes, plus mean, standard deviation, probability, and sample size. Ideal for students, teachers, and analysts.
Area Calculator
Calculate the area of squares, rectangles, circles, triangles, and other common shapes.
Circle Calculator
Calculate circle area, circumference, diameter, and sector properties.
Distance Calculator
Calculate the straight-line distance between two points using their coordinates.
Half-Life Calculator
Calculate remaining quantity, elapsed time, or half-life for radioactive decay and pharmacokinetics.
Mean, Median & Mode Calculator
Calculate the mean, median, mode, and range of any dataset in one step.
Percent Error Calculator
Calculate percent error between experimental and theoretical values.
Permutation & Combination Calculator
Calculate permutations (nPr) and combinations (nCr) for any set of items.
Probability Calculator
Calculate probability, combinations, and permutations for single and multiple events.
Pythagorean Theorem Calculator
Find the missing side of a right triangle using the Pythagorean theorem a²+b²=c².
Sample Size Calculator
Calculate the statistically valid sample size for a survey at any confidence level and margin of error.
Slope Calculator
Calculate slope, y-intercept, and distance between two points on a line.
Standard Deviation Calculator
Calculate population and sample standard deviation and variance for any dataset.
Surface Area Calculator
Calculate the surface area of cubes, spheres, cylinders, cones, and other 3D shapes.
Triangle Calculator
Solve any triangle — find angles and sides using law of sines, cosines, and more.
Volume Calculator
Calculate volume of any 3D shape: cube, sphere, cylinder, cone, and more.
Z-Score Calculator
Calculate the z-score (standard score) of a value within a normal distribution.