About These Calculators
Free math calculators built for middle school students. Get instant answers with step-by-step breakdowns for fractions, percentages, ratios, area, volume, and basic algebra. Every calculator shows the formula so you actually learn the math behind the answer.
Middle School Math Calculators
39 toolsFraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions
Fraction Simplifier
Reduce fractions to their simplest form instantly by finding the greatest common factor
Mixed Number Calculator
Perform arithmetic operations on mixed numbers with whole parts and fractions
Fraction to Decimal Converter
Convert any fraction to its decimal equivalent and check if it repeats
Decimal to Fraction Converter
Convert any decimal number to a fraction in simplest form
Comparing Fractions Calculator
Compare two fractions to determine which is greater, less, or if they are equal
Equivalent Fractions Generator
Generate a list of equivalent fractions by multiplying the numerator and denominator
Percent Change Calculator
Calculate the percentage increase or decrease between two values
Percent to Fraction Converter
Convert any percentage to a fraction in simplest form and its decimal equivalent
Ratio Simplifier
Simplify any ratio to its lowest terms by finding the greatest common factor
Proportion Solver
Solve proportions by finding the missing value in equivalent ratios (a/b = c/x)
Unit Rate Calculator
Find the unit rate or price per unit from any quantity and total value
Order of Operations Calculator
Evaluate math expressions using PEMDAS order of operations and see each step
Integer Operations Calculator
Add, subtract, multiply, and divide positive and negative integers with sign rules explained
Absolute Value Calculator
Find the absolute value (distance from zero) of any number instantly
GCF & LCM Calculator
Find the greatest common factor and least common multiple of two numbers
Prime Factorization Calculator
Break any number into its prime factors and see the complete factor tree
Divisibility Rules Checker
Check which numbers from 2 to 10 evenly divide into any number using divisibility rules
Rounding Calculator
Round any number to a specific place value with step-by-step rounding explanation
Scientific Notation Converter
Convert between standard numbers and scientific notation (a × 10^n) instantly
Evaluating Expressions Calculator
Substitute a value for x and evaluate any algebraic expression step by step
Distributive Property Calculator
Apply the distributive property to expand expressions like a(b + c) step by step
Combining Like Terms Calculator
Combine like terms in algebraic expressions to simplify them instantly
One-Step Equation Solver
Solve one-step equations (like 5x = 30) with the step-by-step process shown
Two-Step Equation Solver
Solve two-step equations of the form ax + b = c with both steps explained
Area Calculator
Calculate the area of rectangles, triangles, circles, and trapezoids with formulas shown
Perimeter Calculator
Calculate the perimeter or circumference of common shapes with formulas explained
Circle Calculator
Calculate radius, diameter, circumference, and area of a circle from any known value
Volume Calculator
Calculate the volume of cubes, prisms, cylinders, cones, and spheres with formulas
Surface Area Calculator
Calculate the total surface area of cubes, prisms, cylinders, and spheres
Coordinate Distance Calculator
Find the distance and midpoint between two points on a coordinate plane
Mean, Median, Mode Calculator
Calculate the mean, median, mode, and range of any data set quickly
Exponent Calculator
Calculate any base raised to a power and see the expanded multiplication form
Square Root Calculator
Find the square root of any number and check if it is a perfect square
Pythagorean Theorem Calculator
Find the missing side of a right triangle using the Pythagorean theorem a² + b² = c²
Triangle Area Calculator
Calculate the area of any triangle using base and height, three sides, or two sides and an included angle
Regular Polygon Area Calculator
Calculate the area, perimeter, interior angle, and apothem of any regular polygon from triangle to dodecagon
Prism & Pyramid Volume Calculator
Calculate the volume and surface area of rectangular prisms, triangular prisms, and pyramids
Sphere, Cone & Cylinder Calculator
Find the volume and surface area of spheres, cones, and cylinders with step-by-step formulas
Frequently Asked Questions
Are these middle school math calculators free?
Yes, all 39 calculators are completely free with no signup required. They run entirely in your browser — no data is sent to any server.
How accurate are these calculators?
Our calculators use industry-standard formulas and are regularly updated. However, they provide estimates — always verify critical calculations with a professional in the relevant field.
Can I use these calculators on my phone?
Yes, all calculators are mobile-responsive and work on any device with a web browser. No app download needed.
Do you save my calculations?
No. All calculations happen in your browser. We don't store any of your inputs or results. Your data stays on your device.
Can I embed these calculators on my website?
Select calculators offer embed codes that you can copy and paste into your website or blog. Look for the "Embed This Calculator" section on individual tool pages.