Fraction Calculator — Add, Subtract, Multiply, Divide
Result
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Mixed number
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Decimal
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Type two fractions, pick an operation, and get the answer instantly — simplified to lowest terms, shown as a mixed number, and converted to a decimal. Whole numbers, mixed numbers like 1 1/2, and decimals like 0.75 all work as inputs. Everything runs in your browser as you type.
How it works
- 1 Enter the first fraction Type a fraction like 3/4, a mixed number like 1 1/2 (whole part, space, fraction), a whole number, or a decimal such as 0.75.
- 2 Pick an operation Click +, −, ×, or ÷ to choose between addition, subtraction, multiplication, and division. The active operation is highlighted.
- 3 Enter the second fraction and read the result The answer updates as you type: the simplified fraction, its mixed-number form when there is a whole part, and the decimal value.
Your data stays private
All processing happens entirely in your browser. No files, text, or data are ever sent to our servers. You can disconnect from the internet and this tool will still work.
Frequently asked questions
- How do I enter a mixed number?
- Type the whole part, a space, then the fraction — for example 2 1/3 means two and one third. A leading minus applies to the whole thing: -2 1/3 is negative two and one third.
- Does the calculator simplify fractions automatically?
- Yes. Every result is reduced to lowest terms by dividing the numerator and denominator by their greatest common divisor. 4/8 becomes 1/2, and 6/4 becomes 3/2 (shown as 1 1/2 in mixed form).
- Can I enter decimals?
- Yes. A decimal like 0.75 is converted to the exact fraction 3/4 before calculating, so 0.75 + 1/4 gives exactly 1. Up to nine decimal places are accepted.
- How does dividing fractions work?
- Dividing by a fraction is the same as multiplying by its reciprocal: 1/2 ÷ 3/4 becomes 1/2 × 4/3 = 4/6, which simplifies to 2/3. Dividing by zero is not defined, so the calculator shows an error instead.
- Is the decimal result exact?
- When the decimal terminates (like 3/4 = 0.75) it is exact. Repeating decimals such as 1/3 are rounded to six decimal places and marked with the ≈ sign.