Calculators
Everyday math, finance, school, and measurement calculators.
Basic Calculator A clean online calculator for quick everyday math. Open Percentage Calculator Find percentages, percent change, discounts, markups, and reverse percentages. Open Ratio Calculator Simplify ratios, find equivalent ratios, and split totals by ratio parts. Open Percent Error Calculator Compare measured and accepted values with percent error, signed error, and steps. Open Half-Life Calculator Calculate remaining amount, elapsed time, or half-life with decay steps. Open Exponent Calculator Calculate powers with positive, negative, zero, decimal, and fraction exponents. Open Log Calculator Calculate logarithms with custom bases, ln, log10, and change-of-base steps. Open Root Calculator Calculate square roots, cube roots, nth roots, exponent form, and steps. Open Quadratic Formula Calculator Solve ax^2 + bx + c = 0 with roots, discriminant, vertex, and steps. Open Binary Calculator Add, subtract, multiply, divide, and convert binary numbers. Open Hex Calculator Add, subtract, multiply, divide, and convert hexadecimal numbers. Open Kawaii Calculator A cute pastel calculator for quick everyday math. Open Scientific Calculator A free scientific calculator for trig, logs, roots, powers, and constants. Open Fraction Calculator Add, subtract, multiply, divide, simplify, and convert fractions. Open Least Common Multiple Calculator Find the least common multiple of two or more whole numbers with steps. Open Greatest Common Factor Calculator Find the greatest common factor of two or more whole numbers with steps. Open Factor Calculator List factors, factor pairs, and prime factorization for a whole number. Open Rounding Calculator Round numbers by decimal places, significant figures, or place value. Open Matrix Calculator Add, subtract, multiply, transpose, and find determinants for 2x2 and 3x3 matrices. Open Scientific Notation Calculator Convert numbers to scientific notation or back to standard form. Open Big Number Calculator Add, subtract, multiply, and divide very large whole numbers exactly. Open Standard Deviation Calculator Calculate sample or population standard deviation, variance, mean, and count. Open Number Sequence Calculator Generate arithmetic, geometric, and Fibonacci-style number sequences. Open Sample Size Calculator Estimate survey sample size from confidence level, margin of error, and proportion. Open Probability Calculator Calculate event union, intersection, complements, and independent-event probability. Open Statistics Calculator Calculate count, sum, mean, median, mode, range, quartiles, variance, and standard deviation. Open Mean, Median, Mode, Range Calculator Find the four headline descriptive statistics for a list of numbers. Open Permutation and Combination Calculator Calculate nPr and nCr for counting arrangements and selections. Open Z-score Calculator Calculate a z-score and approximate standard normal percentile. Open Confidence Interval Calculator Calculate z confidence intervals for a mean or a proportion. Open Triangle Calculator Find triangle area, perimeter, angles, and type from three side lengths. Open Volume Calculator Calculate volume for boxes, cubes, cylinders, spheres, and cones. Open Slope Calculator Find slope, rise, run, and a line equation from two points. Open Area Calculator Calculate area for rectangles, triangles, circles, trapezoids, and parallelograms. Open Distance Calculator Find distance, delta x, delta y, and midpoint from two coordinate points. Open Circle Calculator Find radius, diameter, circumference, and area from one circle measurement. Open Surface Area Calculator Calculate surface area for boxes, cubes, cylinders, spheres, and cones. Open Pythagorean Theorem Calculator Solve a missing right-triangle side with a^2 + b^2 = c^2. Open Right Triangle Calculator Solve right triangle sides, area, perimeter, and acute angles. Open