Math
Percentages, fractions, geometry, algebra, and number theory.
52 calculators in Math
Percentage
Statistics
Average Calculator
Calculate mean, median, mode, and range of numbers.
Confidence Interval Calculator
Calculate the confidence interval for a population mean using sample data.
Correlation Coefficient Calculator
Calculate Pearson's r correlation coefficient and R² from paired (x, y) data.
Gini Coefficient Calculator
Calculate the Gini coefficient to measure income or wealth inequality in a distribution.
Linear Regression Calculator
Calculate the best-fit line y = mx + b from data pairs. Get slope, y-intercept, R², and Pearson r.
Odds Ratio Calculator
Calculate the odds ratio from a 2×2 contingency table with 95% confidence interval and relative risk.
P-Value Calculator
Calculate the p-value from a z-score or t-statistic for one-tailed and two-tailed hypothesis tests.
Queue Wait Time Calculator
Calculate average wait times and queue lengths using M/M/1 and M/M/c queuing theory formulas.
Standard Deviation Calculator
Calculate standard deviation and variance of a data set.
Standard Error Calculator
Calculate the standard error of the mean and confidence interval margins from sample standard deviation and sample size.
Statistical Power Calculator
Calculate the required sample size or achieved statistical power for one-sample, two-sample, and paired tests using Cohen's d effect size.
Weighted Average Calculator
Calculate weighted mean from values and their weights.
Z-Score Calculator
Calculate the Z-score (standard score) of a value within a dataset using mean and standard deviation.
Physics
Arithmetic
Absolute Value Calculator
Calculate the absolute value of any number — positive, negative, or decimal.
Cross Multiply Calculator
Solve proportions using cross multiplication. Find any missing value in a/b = c/d.
Exponent Calculator
Calculate powers and exponents of any number.
Factorial Calculator
Calculate factorial of any number.
Fraction Calculator
Add, subtract, multiply, and divide fractions.
Logarithm Calculator
Calculate logarithms with any base.
Modulo Calculator
Calculate the remainder of integer division.
Proportion Calculator
Find the missing value in a direct or inverse proportion.
Ratio Calculator
Solve and simplify ratios and proportions with step-by-step results.
Scientific Notation Calculator
Convert numbers to and from scientific notation.
Square Root Calculator
Find the square root of any positive number.
Algebra
Binomial Coefficient Calculator
Calculate binomial coefficients and expand binomials.
Calculus Calculator
Differentiate and integrate polynomial expressions step by step.
Complex Number Calculator
Perform arithmetic with complex numbers: add, subtract, multiply, divide, and find modulus and argument.
Matrix Calculator
Perform matrix operations: addition, subtraction, multiplication, determinant, and inverse.
Quadratic Equation Solver
Solve quadratic equations and show step-by-step solution.
Series Sum Calculator
Calculate the sum of arithmetic and geometric series.
Number Theory
Conversion
Other
Area Calculator
Calculate the area of various geometric shapes.
Aspect Ratio Calculator
Calculate and convert aspect ratios for images and screens.
Circle Calculator
Calculate area, circumference, and diameter of a circle.
Midpoint Calculator
Find the midpoint and distance between two points on a 2D coordinate plane.
Permutation & Combination
Calculate permutations and combinations (nPr, nCr).
Population Density Calculator
Calculate population density — people per km², mi², hectare, or acre — with instant unit conversions.
Pythagorean Theorem Calculator
Calculate the sides of a right triangle.
Random Number Generator
Generate random numbers within a specified range.
Significant Figures Calculator
Round numbers to the correct number of significant figures.
Slope Calculator
Calculate the slope of a line from two points.
Triangle Calculator
Calculate sides, angles, area, and perimeter of triangles.
Trigonometry Calculator
Calculate sine, cosine, tangent, and inverse trig functions.
Volume Calculator
Calculate the volume of 3D shapes.