Math Calculators
General math, statistics, geometry, and scientific calculators.
General Math
Fractions, percentages, exponents, logarithms, and number operations.
Big Number Calculator
Perform arithmetic (add, subtract, multiply) on very large integers beyond standard calculator range.
Conversion Calculator
Convert between common measurement units including length, temperature, area, and volume.
Density Calculator
Calculate density (ρ = m/V), mass, or volume when any two of the three values are known.
Exponent Calculator
Calculate base raised to any power, including fractional exponents.
Factor Calculator
Find all factors (divisors) and the prime factorization of any positive integer.
Fraction Calculator
Perform arithmetic on fractions and simplify the result automatically.
GDP Calculator
Calculate Gross Domestic Product (GDP) using the expenditure approach: C + I + G + Net Exports.
Greatest Common Factor Calculator
Find the Greatest Common Factor (GCF), also called GCD, of two or more integers — the largest number that divides them all.
Half-Life Calculator
Calculate the remaining quantity of a substance after a given number of half-lives have elapsed.
Hex Calculator
Convert numbers between hexadecimal, decimal, binary, and octal number bases.
Least Common Multiple Calculator
Find the Least Common Multiple (LCM) of two or more integers — the smallest number divisible by all of them.
Log Calculator
Calculate the logarithm of a number in any base, including log₁₀ (common log) and ln (natural log).
Mass Calculator
Convert mass between grams, kilograms, milligrams, pounds, ounces, tons, and other units.
Matrix Calculator
Perform 2×2 matrix operations: find the determinant, inverse, transpose, and multiply two matrices.
Molarity Calculator
Calculate molarity (concentration in mol/L), moles, or volume needed to prepare a solution.
Molecular Weight Calculator
Calculate molar mass (molecular weight) of common chemical compounds and elements.
Percent Error Calculator
Find the percent error between a measured and true value.
Percentage Calculator
Calculate percentages, find what percent a number is, or compute percent change.
Quadratic Formula Calculator
Solve any quadratic equation ax² + bx + c = 0 using the quadratic formula to find real or complex roots.
Random Number Generator
Generate random integers between a minimum and maximum value.
Ratio Calculator
Simplify ratios, check proportions, and solve for missing values in equivalent ratios.
Roman Numeral Converter
Convert any integer from 1 to 3999 to Roman numerals, or decode Roman numerals back to integers.
Root Calculator
Calculate the square root, cube root, or any nth root of a number.
Rounding Calculator
Round any number to a specified number of decimal places, significant figures, or a custom increment.
Scientific Calculator
Calculate square roots, trig functions, logarithms, and more.
Scientific Notation Calculator
Convert numbers to scientific notation (a × 10ⁿ) and back to standard decimal form.
Speed Calculator
Calculate speed, distance, or time when any two of the three values are known.
Weight Calculator
Convert weight or body weight between pounds, kilograms, stones, and other common units.
Statistics
Standard deviation, probability, sample size, and z-score calculators.
Confidence Interval Calculator
Calculate the confidence interval for a population mean given sample mean, standard deviation, sample size, and confidence level.
Mean, Median, Mode, Range Calculator
Calculate the mean (average), median (middle value), mode (most frequent), and range for a data set.
Number Sequence Calculator
Calculate the nth term and sum of arithmetic (add constant) or geometric (multiply constant) sequences.
Permutation and Combination Calculator
Calculate permutations P(n,r) and combinations C(n,r) — the number of ways to arrange or select r items from n.
Probability Calculator
Calculate the probability of an event, its complement, and combined probabilities for multiple events.
Sample Size Calculator
Determine the required sample size for a survey or study based on population size, confidence level, and margin of error.
Standard Deviation Calculator
Calculate population and sample standard deviation, variance, and mean for a set of numbers.
Statistics Calculator
Compute comprehensive descriptive statistics including mean, median, standard deviation, quartiles, and IQR.
Z-Score Calculator
Calculate the z-score (standard score) and approximate percentile for a value relative to a normal distribution.
Geometry
Area, volume, triangle, circle, distance, and shape calculators.
Area Calculator
Calculate the area of common 2D shapes including rectangle, circle, triangle, square, and trapezoid.
Circle Calculator
Calculate circle area, circumference, diameter, and chord length from any given measurement.
Distance Calculator
Calculate the straight-line distance between two 2D points using the distance formula.
Pythagorean Theorem Calculator
Calculate the hypotenuse or a leg of a right triangle using a² + b² = c².
Right Triangle Calculator
Solve a right triangle completely — find all sides and angles when given two known values.
Slope Calculator
Calculate the slope and equation of a line passing through two given coordinate points.
Surface Area Calculator
Calculate the total surface area of common 3D shapes including sphere, cube, cylinder, cone, and rectangular prism.
Triangle Calculator
Calculate the area, perimeter, and type of a triangle given three side lengths.
Volume Calculator
Calculate the volume of common 3D shapes including sphere, cube, cylinder, cone, and rectangular prism.