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Fraction calculator

Calculators

Add, subtract, multiply and divide fractions with simplified output.

Updated

Fraction calculator

Add, subtract, multiply and divide fractions with simplified output.

Input format: Expression format: a/b + c/d (or -, *, /)

Output

Quick start

How to use fraction-calculator

Enter input and view computed output.

  1. Step 1
    Enter input

    Paste or type your data in the input box.

  2. Step 2
    Compute

    The tool processes input instantly in your browser.

  3. Step 3
    Use output

    Copy output and continue your workflow.

In-depth guide

Fraction calculator guide

Add, subtract, multiply and divide fractions with simplified output. This tool is designed for fast local processing and practical day-to-day use.

Quick start

Paste input, review output instantly, then copy it for your workflow.

Input tips

Use one value per line for structured inputs. Common separators are handled gracefully.

Privacy

Processing runs in your browser tab for the MVP workflow, with no mandatory upload step.

When to use it vs alternatives

Use this calculator for quick everyday estimates, date math, percentages, bill splitting, or simple planning. Use an official source or domain-specific calculator when legal, billing, payroll, or compliance accuracy is required.

Common pitfalls

  • Confirm dates, time zones, percentages, rounding, and currency assumptions before sharing a result.
  • Small input changes can produce noticeably different totals in date ranges, bills, and percentages.
  • Keep the original numbers nearby until the final result is verified.

Frequently asked questions

Does it simplify the result?

Yes. Results are reduced to lowest terms by dividing the numerator and denominator by their greatest common divisor.

Can it add fractions with different denominators?

Yes. It finds a common denominator automatically before adding or subtracting.

Does it handle mixed numbers?

Yes. Convert mixed numbers to improper fractions or enter them directly, and the result can be shown as a mixed number.

What about dividing by a fraction?

Dividing by a fraction multiplies by its reciprocal, which the tool does for you, so a/b divided by c/d becomes a/b times d/c.

Can I convert a fraction to a decimal?

Yes. The tool shows the decimal equivalent alongside the simplified fraction.

Is any data uploaded?

No. All calculations run locally in your browser.

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