Fraction Calculator – Add, Subtract, Multiply, Divide, and Simplify
Calculate fraction operations, simplify to lowest terms, convert mixed/improper forms, and see decimals with formulas and explanations.
No uploads. Everything runs locally in your browser.
Example loaded. Adjust values and calculate.
1/2 + 3/4 = (1×4 + 2×3) / (2×4) = 10/8 → simplified to 5/4.
What is this tool
The Fraction Calculator handles fraction math end-to-end: addition, subtraction, multiplication, division, simplification, and conversions between improper and mixed numbers. It reduces results to lowest terms, provides decimal equivalents, and shows step-by-step formulas so you can check your work for homework, recipes, ratios, or quick math checks. All calculations run locally, keeping data private and responses instant.
By surfacing simplified and mixed forms alongside decimals, the tool makes it easy to share clear answers with classmates, teammates, or stakeholders. Error handling blocks zero denominators and invalid inputs, ensuring results stay trustworthy.
Use cases
- Work through fraction problems in math homework or classroom exercises.
- Scale cooking measurements using precise fraction operations.
- Convert between improper and mixed numbers for clearer communication.
- Calculate ratios or portions in budgeting, recipes, or DIY projects.
- Check fraction arithmetic in code, spreadsheets, or reports.
Whether you’re adjusting ingredient ratios, splitting bills, or validating formulas, the calculator keeps fraction math concise and verifiable.
Popular ways to use this tool
- Add or subtract fractions for recipes, dosing, or parts lists.
- Multiply/divide fractions to scale materials or convert units.
- Simplify messy fractions from measurements or sensor outputs.
- Convert mixed numbers to improper (and back) for consistent documentation.
- Share decimal equivalents alongside simplified fractions in reports.
With one-click copy, you can paste results into homework, tickets, or docs without rewriting fractions. Mixed and decimal views keep everyone aligned on the same values.
How to use
- Choose an operation: Add, Subtract, Multiply, Divide, Simplify, Improper → Mixed, or Mixed → Improper.
- Enter numerators/denominators (and whole number for mixed if needed).
- Click Calculate to see the simplified fraction, mixed number, and decimal value with step-by-step formulas.
- Copy results or load the example; use Clear to reset.
Features
- Supports negative fractions, decimals, and mixed/improper conversions
- Simplifies all results to lowest terms using GCD
- Shows mixed number (when applicable) and decimal equivalents
- Step-by-step explanations with formula context for each operation
- Copy results, example fill, and clear/reset with responsive layout
FAQ
Which fraction operations are supported?
Addition, subtraction, multiplication, division, simplification, improper → mixed, and mixed → improper conversions.
Do you simplify automatically?
Yes. Results are reduced to lowest terms using GCD. Mixed and improper conversions also return simplified forms.
How are decimals shown?
Each result includes a decimal approximation rounded to 6 decimals for quick reference.
What about zero denominators?
The tool blocks zero denominators and shows a clear error instead of computing invalid results.
Is this fraction calculator free?
Yes. It runs entirely in your browser with no login and no data uploads.