Math Calculators
Algebra, geometry, statistics, and scientific tools.
Solve everyday math problems instantly — percentages, fractions, geometry, algebra, and statistics — with calculators that show the formula and worked steps, not just the answer.
Scientific Calculator
Full-featured scientific calculator with trig and log functions.
Open Calculator →Percentage Calculator
Calculate percentages, percentage change, and more.
Open Calculator →Fraction Calculator
Add, subtract, multiply, and divide fractions.
Open Calculator →Decimal to Fraction Calculator
Convert any decimal, including repeating decimals, into a simplified fraction.
Open Calculator →Triangle Calculator
Solve for sides, angles, and area of any triangle.
Open Calculator →Standard Deviation Calculator
Calculate mean, variance, and standard deviation of a data set.
Open Calculator →Area Calculator
Calculate the area of common 2D shapes.
Open Calculator →Volume Calculator
Calculate the volume of common 3D shapes.
Open Calculator →Log Calculator
Calculate logarithms with any base.
Open Calculator →Quadratic Formula Calculator
Solve quadratic equations and find their roots.
Open Calculator →Pythagorean Theorem Calculator
Find the missing side of a right triangle.
Open Calculator →Circle Calculator
Calculate area, circumference, radius, and diameter.
Open Calculator →Slope Calculator
Calculate the slope between two points.
Open Calculator →Sample Size Calculator
Calculate the sample size needed for a survey or study.
Open Calculator →Probability Calculator
Calculate probability of single and combined events.
Open Calculator →Statistics Calculator
Calculate mean, median, mode, range, and more.
Open Calculator →Mean, Median, Mode Calculator
Find the mean, median, mode, and range of a data set.
Open Calculator →Permutation & Combination Calculator
Calculate permutations (nPr) and combinations (nCr).
Open Calculator →Z-Score Calculator
Calculate the z-score and percentile for a normal distribution.
Open Calculator →Ratio Calculator
Simplify ratios and solve for missing values.
Open Calculator →Frequently Asked Questions
Do these math calculators show the formula used?
Yes, every math calculator includes the underlying formula and a worked example so you can understand the method, not just get the answer.
Can I use these for homework or exam prep?
Absolutely. They're designed to help you check your work and understand the steps behind percentage, geometry, and statistics problems.