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Fraction Calculator

Math Calculators

Add, subtract, multiply, divide fractions with simplification

Quick Answer

Fraction Calculator: Add, subtract, multiply, divide fractions with simplification. Fraction Calculator uses standard math formulas to compute accurate results instantly.

Add/subtract: common denominator first | Multiply: straight across | Divide: flip the second fraction | Always reduce by GCD

1/2 + 1/3 =

5/6
Simplified5/6
Decimal0.833333
Mixed number—
Percent83.3333%

Step-by-step

  1. 1Common denominator: 2 × 3 = 6
  2. 21/2 = 3/6; 1/3 = 2/6
  3. 3Add numerators: (3 + 2) / 6 = 5/6
  4. 4Already in lowest terms

Common fractions

FractionDecimalPercent
1/20.550%
1/30.333333.33%
1/40.2525%
2/30.666766.67%
3/40.7575%
1/50.220%
1/80.12512.5%
3/80.37537.5%
5/80.62562.5%
1/60.166716.67%

💡 Tip: cross-cancellation before multiplying keeps numbers small, e.g. 3/4 × 2/5 = (3×2)/(4×5) = 6/20 = 3/10.

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How to Use

  1. Enter values or expressions: type directly into the Fraction Calculator — keyboard friendly.
  2. Instant results: everything computes live as you type, no button needed.
  3. Follow the steps: the result panel shows full working and formula substitution.
  4. Copy or recompute: one-click copy; change any input to recalculate instantly.

Key Points

  • Fraction Calculator is a free online math tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Add, subtract, multiply, divide fractions with simplification.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Fraction Calculator formula

Fraction Calculator uses standard math formulas to compute accurate results instantly.

FAQ

How do I use the Fraction Calculator?
Open the page and fill in the input fields — results update automatically. Add, subtract, multiply, divide fractions with simplification.
Are the results accurate?
Yes. All calculations use standard mathematical formulas and are verified for accuracy.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required — just open and use.
Does it work on mobile?
Yes. The responsive design works on phones, tablets and desktops.
Is my data saved?
No. All calculations run locally in your browser. Nothing is uploaded or stored.

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Source & Updates

Standard mathematical formulas. All logic verified. Last updated: 2025-07

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. Fraction Calculator[EB/OL]. https://www.yijiansuan.com/en/c/math/fraction

Results provided by this tool are for reference only and do not constitute professional advice.