Math

Instant, private, and free

Fraction Calculator.

Add, subtract, multiply, and divide fractions

On-device calculationNo signup
01

Set your values

Results update as you type.

Result (fraction): 5/6

Result (fraction)

5/6
Result (decimal): 0.833333

Result (decimal)

0.833333

FAQs

Can I enter mixed numbers?

Yes, enter the whole number part followed by numerator and denominator.

Does it simplify fractions automatically?

Yes, all results are reduced to simplest terms automatically.

Cite this calculator

Canonical URL: https://mathify.one/fr/math/fraction

Cite as: Mathify. (2026). Calculatrice de Fractions. https://mathify.one/fr/math/fraction

Use Cases

Homework and Study Aid

Check your fraction arithmetic homework or practice problems. Enter your fractions and operation to see the correct result and verify your work.

Example: Verify that 2/3 + 1/6 = 5/6.

Cooking and Baking Measurements

Adjust recipes by adding, subtracting, multiplying, or dividing fractional measurements like cups or teaspoons.

Example: Double a recipe that calls for 3/4 cup of flour: 3/4 × 2 = 1 1/2 cups.

Frequently Asked Questions

How do I add fractions with different denominators?
To add fractions with different denominators, first find a common denominator (the least common multiple of the denominators). Convert each fraction to an equivalent fraction with that denominator, then add the numerators. The calculator does this automatically for you.
Can this calculator handle mixed numbers?
This calculator is designed for proper and improper fractions. If you have a mixed number, convert it to an improper fraction first (multiply the whole number by the denominator, add the numerator, and place over the original denominator) before using the calculator.
Does the calculator simplify the result?
Yes, the calculator simplifies the result to its lowest terms. It also converts improper fractions to mixed numbers for clarity, if applicable.

Tips & Common Mistakes

Tips

  • Always enter fractions in the form numerator/denominator (e.g., 3/4). The denominator cannot be zero.
  • For mixed numbers, convert them to improper fractions before using the calculator.
  • Use the calculator to check your manual calculations, but also practice solving by hand to build confidence.
  • When multiplying fractions, you can simplify before multiplying to make the calculation easier.

Common Mistakes to Avoid

  • Forgetting to find a common denominator when adding or subtracting fractions.
  • Multiplying numerators and denominators incorrectly when multiplying fractions (multiply across, not cross).
  • Dividing fractions without flipping the second fraction (multiply by the reciprocal).

Last updated: August 13, 2026