Simplified fraction--
Mixed number--
Fraction Calculator
Use this fraction calculator for recipe math, tape measure work, woodworking, construction, homework, and everyday fraction operations.
Updated May 2026No signup requiredBuilt for mobile
Calculator
How to use this calculator
- Enter your values in the calculator fields.
- Check that the units and percent formats match what the label asks for.
- Click Calculate to update the result.
- Use Reset Calculator to restore the starting example.
Formula or calculation method
Add/subtract fractions by using a common denominator.
Multiply fractions by multiplying numerators and denominators.
Divide by multiplying by the reciprocal.
Simplify by dividing numerator and denominator by their greatest common divisor.
Worked example
1/2 + 3/4 becomes 2/4 + 3/4 = 5/4, which is 1 1/4 as a mixed number.
Practical planning tips
- Recipes
- Tape measure math
- Woodworking cuts
- Construction estimates
- Homework checks
Common mistakes to avoid
- Adding denominators directly
- Forgetting to simplify
- Dividing by a fraction with a zero numerator
FAQ
Fraction Calculator questions
Is this calculator exact?
It is a practical estimate based on the values you enter. Verify important decisions with the official source, lender, school, product label, or professional guidance when needed.
Why did I get an error?
The calculator checks for blank fields, invalid numbers, impossible negative values, and divide-by-zero situations. Review the message and adjust the input.
Can I use this calculator on my phone?
Yes. The inputs, buttons, and result cards are built to work on mobile screens.
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