Math Calculators
Homework help and quick answers for everyday math. Fractions, ratios, statistics and a full scientific calculator — with results you can check and understand, not just copy.
Scientific Calculator
A full scientific calculator: powers, roots, trigonometry, logarithms and constants.
Open toolFraction Calculator
Add, subtract, multiply and divide fractions, with simplified results.
Open toolPercentage Difference Calculator
The percentage difference between two numbers — not the same as percentage change.
Open toolRatio Calculator
Simplify ratios, scale them up or down, and solve for missing values.
Open toolProbability Calculator
Probabilities for single and combined events, with odds conversion.
Open toolQuadratic Equation Calculator
Roots of ax² + bx + c = 0 using the quadratic formula, with the discriminant.
Open toolStandard Deviation Calculator
Standard deviation, variance and mean for any set of numbers.
Open toolMean Median Mode Calculator
Mean, median, mode and range for your data set, sorted and explained.
Open toolGeometry Calculator
Area, perimeter and volume for common shapes — circles, triangles, boxes and more.
Open toolNumber Base Converter
Convert between binary, octal, decimal and hexadecimal.
Open toolSquare Root Calculator
Square roots with perfect-square checks and simplified radicals like 6√2.
Open toolExponent Calculator
Any base to any power, with exact big-integer results where they count.
Open toolLogarithm Calculator
Logarithms in any base, plus log₁₀, ln and log₂ side by side.
Open toolFactorial Calculator
Exact factorials with BigInt — digit counts and trailing zeros included.
Open toolLCM and GCF Calculator
Least common multiple and greatest common factor of two to four numbers, with factorization.
Open toolPrime Number Checker
Is it prime? Check a number, get its prime factorization and the primes around it.
Open toolSlope Calculator
Slope, midpoint, distance and angle between two points.
Open toolPythagorean Theorem Calculator
Solve for any side of a right triangle, with the angles too.
Open toolLong Division Calculator
Quotient, remainder and decimal from a division, with the steps shown.
Open toolMath help that shows its working
An answer you cannot check is only half an answer. CalcViso math tools show the steps: fractions are worked through a common denominator, statistics list the mean, median and spread side by side, and the Scientific Calculator evaluates full expressions with a real parser — no shortcuts, and degrees or radians whenever trig is involved.
Students use this section most for the Percentage Difference Calculator (which carefully separates percentage difference from percentage change), the Standard Deviation Calculator with both population and sample results, and the Quadratic Equation Calculator, which reports the discriminant and vertex alongside the roots so you can see why an equation behaves the way it does.
The single-answer tools cover the operations students look up one at a time: Square Root (with simplified radicals), Exponent, Logarithm in any base, and Factorial with exact BigInt results. Number theory gets the LCM and GCF Calculator and the Prime Number Checker with full factorization, and geometry adds the Slope Calculator (slope, midpoint, distance, angle) and the Pythagorean Theorem Calculator. The Long Division Calculator shows quotient, remainder and decimal with its steps laid out.