➗ Math

Fraction Calculator

Add, subtract, multiply or divide two fractions and get a simplified answer.

Results

Result (simplified)
7/12
Decimal
0.583333333333

📊 Fraction Calculator chart

Visual summary of your results.

What is the Fraction Calculator?

Add, subtract, multiply or divide two fractions and get a simplified answer. From percentages and fractions to logarithms and quadratic equations, these math calculators show exact results — using arbitrary-precision integers wherever whole-number answers can get very large.

Fraction Calculator – free online math tool illustration
Fraction Calculator — free, exact and private.

How to use the Fraction Calculator

  1. Enter your fraction 1 numerator, your fraction 1 denominator, your operation, your fraction 2 numerator and the remaining fields.
  2. Results update automatically as you type; you can also press Calculate.
  3. Read the output: result (simplified), decimal.
  4. Use the 📊 chart to see the result visually, then copy or share it.

Formula and method

a/b + c/d = (ad + cb) ÷ bd a/b × c/d = ac ÷ bd a/b ÷ c/d = ad ÷ bc

Worked example

With fraction 1 numerator = 1, fraction 1 denominator = 3, operation = Add (+), fraction 2 numerator = 1, fraction 2 denominator = 4, the Fraction Calculator returns result (simplified): 7/12; decimal: 0.583333333333.

Tips for better results

  • Use the formula section on each page to check your homework method, not just the answer.
  • For very large factorials, combinations and base conversions we use exact big-integer math.
  • Floating-point results are rounded to 12 significant digits to remove binary noise.

Frequently asked questions

What does the Fraction Calculator do?

Add, subtract, multiply or divide two fractions and get a simplified answer.

How is it calculated?

The Fraction Calculator uses this method: a/b + c/d = (ad + cb) ÷ bd; a/b × c/d = ac ÷ bd; a/b ÷ c/d = ad ÷ bc.

Can you show an example?

With fraction 1 numerator = 1, fraction 1 denominator = 3, operation = Add (+), fraction 2 numerator = 1, fraction 2 denominator = 4, the Fraction Calculator returns result (simplified): 7/12; decimal: 0.583333333333.

Is the Fraction Calculator accurate?

Yes. It uses standard formulas and exact constants, and the results are verified by our automated test suite. Values are displayed to up to 12 significant digits.

Is this tool free and private?

Yes — the Fraction Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.

Related tools

Ratio CalculatorSimplify a ratio and scale it to a new total or term.Proportion CalculatorSolve a proportion A/B = C/X for the missing value using cross-multiplication.GCD CalculatorFind the greatest common divisor (GCF/HCF) of two or more whole numbers.LCM CalculatorFind the least common multiple of two or more whole numbers.Square Root CalculatorCalculate the square root of any number, and check whether it is a perfect square.Cube Root CalculatorCalculate the cube root of any positive or negative number.Nth Root CalculatorCalculate the nth root of a number for any index n.Exponent CalculatorRaise a base number to any power, including negative and fractional exponents.

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