🔢Math Calculators - Percentage, Fractions, Algebra & Statistics
From quick percentage calculations to probability and statistics, our math calculators give you instant answers with the formula shown so you understand the method, not just the result. Useful for students, teachers, and anyone who needs fast, reliable math without a textbook.
Percentage Calculator
Need to find what percentage one number is of another? Our percentage calculator makes it easy. Perfect for calculating tips, discounts, grades, and more.
Use Calculator →Percentage Increase Calculator
Find out what percentage something has increased. Useful for calculating salary increases, price growth, or any increase over time.
Use Calculator →Percentage Decrease Calculator
Find out what percentage something has decreased. Useful for calculating discounts, price drops, or any decrease over time.
Use Calculator →Percentage of a Number Calculator
Find out what a specific percentage of a number is. For example, find what 20% of 500 is. Great for calculating tips, commissions, and discounts.
Use Calculator →Percentage to Decimal Converter
Need to convert a percentage to a decimal? This converter makes it easy. Simply enter the percentage and get the decimal value.
Use Calculator →Fraction to Decimal Calculator
Convert any fraction to its decimal equivalent instantly. Perfect for understanding fractions in decimal form for calculations or comparisons.
Use Calculator →Simplify Fractions Calculator
Simplify any fraction to its lowest terms instantly. This calculator finds the greatest common divisor and reduces your fraction.
Use Calculator →Add Fractions Calculator
Add fractions effortlessly with this calculator. It handles different denominators and simplifies the result automatically.
Use Calculator →Multiply Fractions Calculator
Multiply fractions easily with our calculator. Simply enter your fractions and get the simplified result instantly.
Use Calculator →Fraction to Percentage Calculator
Convert any fraction to its percentage equivalent instantly. Perfect for understanding what fraction represents in percentage form.
Use Calculator →Average Calculator
Find the average (mean) of any set of numbers instantly. Great for calculating averages in sports, school, work, and more.
Use Calculator →Weighted Average Calculator
Calculate a weighted average where each value has a different weight or importance. Perfect for grades, portfolio returns, and more.
Use Calculator →Mean, Median, Mode Calculator
Calculate the mean (average), median (middle value), and mode (most frequent value) for any dataset. Essential statistical measures.
Use Calculator →Exponent Calculator
Calculate any number raised to any power instantly. Perfect for math homework, engineering, and scientific calculations.
Use Calculator →Square Root Calculator
Find the square root of any number instantly. A square root is a value that, when multiplied by itself, equals the original number.
Use Calculator →Nth Root Calculator
Find the nth root of any number. This is a generalization of square roots - find the cube root, fourth root, or any root you need.
Use Calculator →Logarithm Calculator
Calculate logarithms with any base. A logarithm answers the question: 'What power must the base be raised to, to get the number?'
Use Calculator →Natural Logarithm Calculator
Calculate the natural logarithm (ln) of any number. The natural logarithm uses e (≈2.71828) as its base.
Use Calculator →Logarithm Base Calculator
Calculate logarithms with any custom base. Perfect for solving exponential equations and advanced mathematics.
Use Calculator →GCD Calculator
Find the greatest common divisor (GCD) of any numbers. The GCD is the largest number that divides all given numbers evenly.
Use Calculator →LCM Calculator
Find the least common multiple (LCM) of any numbers. The LCM is the smallest number that is a multiple of all given numbers.
Use Calculator →Circle Area Calculator
Calculate the area of a circle using its radius or diameter. Perfect for geometry problems, design projects, and more.
Use Calculator →Triangle Area Calculator
Calculate the area of a triangle using the base and height. Also works with three side lengths using Heron's formula.
Use Calculator →Pythagorean Theorem Calculator
Use the Pythagorean theorem to find missing sides of right triangles. Perfect for geometry, construction, and design.
Use Calculator →Sphere Volume Calculator
Calculate the volume of a sphere using its radius. Useful for physics, engineering, and design applications.
Use Calculator →Trigonometry Calculator
Calculate sine, cosine, tangent, and other trigonometric functions for any angle. Works in degrees and radians.
Use Calculator →Inverse Trigonometry Calculator
Calculate inverse trigonometric functions (arcsin, arccos, arctan). These find angles from trig ratios.
Use Calculator →Law of Sines Calculator
Use the Law of Sines to find missing sides or angles in any triangle. Perfect for trigonometry problems.
Use Calculator →Variance Calculator
Calculate the variance of a dataset. Variance measures how spread out numbers are from their average.
Use Calculator →Standard Deviation Calculator
Calculate the standard deviation of a dataset. Standard deviation measures the average distance from the mean.
Use Calculator →Z-Score Calculator
Calculate z-scores to standardize data and find how many standard deviations a value is from the mean.
Use Calculator →Power Calculator
Calculate any number raised to any power instantly. Perfect for math homework and scientific calculations.
Use Calculator →Factorial Calculator
Calculate the factorial of any positive integer. A factorial (n!) is the product of all positive integers from 1 to n.
Use Calculator →Combinations Calculator
Calculate combinations to find how many ways you can choose items from a larger set where order doesn't matter.
Use Calculator →Permutations Calculator
Calculate permutations to find how many ways you can arrange items from a larger set where order matters.
Use Calculator →Why Use Our Math Calculators Calculators?
A calculator that shows only the answer teaches you nothing. Every math calculator on this site shows the formula and, where applicable, the intermediate steps so you can follow the logic, check it against your own work, or explain the method to someone else. Whether you're calculating a percentage change for a business report, simplifying a fraction for a recipe, or finding the standard deviation of a data set, the formula is always visible.
Our math tools are designed to handle the inputs you actually have, not the cleaned-up textbook versions. Enter decimals, negatives, large numbers, or zero—the calculators handle edge cases correctly and return a meaningful result or a clear explanation of why the calculation isn't defined (like dividing by zero or taking the square root of a negative number in real numbers).
Pro Tips for Math Calculators Projects
- 1For percentage calculations, identify clearly whether you're finding 'X% of Y' or 'X is what percent of Y'—the two are different operations.
- 2When comparing two percentages, use the percentage change formula, not subtraction—10% to 15% is a 50% increase, not a 5% increase.
- 3Fractions must have a common denominator before you can add or subtract them—our fraction calculator handles this automatically.
- 4Standard deviation measures spread around the mean—a high SD means data points are widely scattered; a low SD means they cluster closely.
- 5Factorials grow extremely fast: 20! is already 2.4 quintillion. Use combinations and permutations calculators for large n.
- 6When rounding, always round only at the final step—intermediate rounding introduces cumulative error in multi-step calculations.
- 7Probability results are always between 0 and 1; percentages between 0 and 100%. A result outside those ranges means a calculation error.