Math Calculators
Free math calculators for percentages, fractions, area, volume, number bases, Roman numerals, scientific calculations, random numbers, standard deviation, averages, z-scores, factors, scientific notation, significant figures, rounding, triangles, square roots, the quadratic formula, slope, ratios, long division, and the Pythagorean theorem.
Percentage Calculator
Calculate percentage increase, decrease, and difference between values instantly.
Scientific Calculator
Advanced functions including trigonometry for solving complex equations easily.
Fraction Calculator
Add, subtract, multiply, and divide fractions easily with step-by-step results.
Area Calculator
Calculate the area of rectangles, circles, triangles, and other shapes with ease.
Volume Calculator
Calculate the volume of spheres, cylinders, and 3D shapes for any project.
Number Base Converter
Convert numbers between decimal, binary, and hexadecimal bases for programming.
Roman Numeral Converter
Convert Roman numerals and Arabic numbers instantly for historical data.
Random Number Generator
Draw unbiased whole numbers from a minimum to a maximum, with or without repeats.
Standard Deviation Calculator
Sample and population standard deviation, plus both variances, from a list.
Average Calculator
Mean, median, mode, and range from a list of numbers.
Z-Score Calculator
Z-score and a labeled standard-normal probability from a value, mean, and sd.
Factor Calculator
Positive factors and prime factorization, or an integer quadratic factorization.
Scientific Notation Calculator
Convert a decimal to a × 10ⁿ and back, with the steps shown.
Significant Figures Calculator
Count, round, and apply the lab rules for ×, ÷, +, and −.
Rounding Calculator
Round half up to a chosen place and show the deciding digit.
Triangle Calculator
Solve sides and angles from SSS, SAS, ASA, AAS, or a right triangle, plus the area.
Square Root Calculator
Principal square root, simplified radical, and a perfect-square check.
Quadratic Formula Calculator
Discriminant, steps, and both roots of a degree-2 equation, including complex roots.
Slope Calculator
Slope, midpoint, distance, and the line through two points.
Ratio Calculator
Simplify a ratio, share a total, or solve a proportion.
Long Division Calculator
Step-by-step division of whole numbers and decimals, including repeating decimals.
Pythagorean Theorem Calculator
Solve a right triangle for side a, b, or c.