Math Calculators
Percentage, fractions, geometry, and more — instant answers with step-by-step explanations.
From quick percentage calculations to geometry problems and fraction arithmetic — our math calculators give you clear answers with the formulas and steps shown, so you understand how the result was reached.
🧮 All Math Tools (14 tools)
Percentage Calculator
Find what percent X is of Y, increase/decrease, or reverse percentage
Percent Off Calculator
Sale price and savings for any price and discount percentage
Percentage Increase Calculator
Calculate the % increase between two values
Percentage Decrease Calculator
Calculate the % decrease between two values
Fraction Calculator
Add, subtract, multiply, or divide fractions — simplified with steps
Decimal to Fraction
Convert any decimal to a simplified fraction with steps
Pythagorean Theorem Calculator
Find any side of a right triangle — a² + b² = c²
Square Footage Calculator
Area of rooms, floors, land — rectangle, triangle, circle, L-shape
Concrete Calculator
Cubic yards and bags needed for slab, footing, column, or circular pour
GPA Calculator
Calculate semester or cumulative GPA from letter grades or percentages — 4.0 scale
Tire Size Calculator
Decode any tire size — diameter, sidewall, circumference, speedometer correction
Binary to Text Converter
Convert binary code to text and text to binary — bidirectional
Markup Calculator
Find selling price from cost and desired markup percentage
Margin Calculator
Calculate gross profit margin from cost and revenue
What Can You Calculate?
- Percentages — percent of a number, percent increase/decrease, reverse percentage, sale price
- Fractions — add, subtract, multiply, divide any fractions with simplified results and mixed numbers
- Geometry — right triangles with Pythagorean theorem, area of rooms and land with square footage calculator
- Construction — concrete volume in cubic yards and bag counts for slabs, footings, and columns
- Encoding — convert text to binary and binary back to text
- Markup & Margin — selling price from cost, gross profit margin for business pricing
Frequently Asked Questions
Do these calculators show their work?
Yes. Every calculator on ComputeZap shows the formula used and, where applicable, step-by-step working so you can understand and verify the result — not just copy a number.
How do I calculate a percentage of a number?
Use the Percentage Calculator. Enter the percentage and the number — it handles "what is X% of Y", "X is what % of Y", and reverse percentage in one tool.
How do I add two fractions?
Use the Fraction Calculator. Enter both fractions, select "Add", and get the simplified result, mixed number form, decimal equivalent, and the step-by-step working.
How do I find the hypotenuse of a right triangle?
Use the Pythagorean Theorem Calculator. Enter any two sides and it solves for the third using a² + b² = c².