Math & Scientific
Fraction Calculator
Fraction — fraction Calculator carries out the fraction arithmetic over a common denominator, then reduces the answer by the greatest common divisor. This page runs that same calculation on your numbers, in your browser: no signup, no uploads, nothing stored.
Fraction Calculator lets you work through a calculation in seconds: enter your numerator A, denominator A, operation and numerator B for the result, all worked out locally in your browser.
Exact arithmetic accepts up to 4096 digits per number and decimal exponents from −4096 to 4096. Use digit strings for large WebMCP numbers; decimal display is rounded only where labelled.
About this calculator
Fraction Calculator carries out the fraction arithmetic over a common denominator, then reduces the answer by the greatest common divisor. It matters when you need the exact relationship checked quickly rather than worked through by hand. Here is the calculation on real numbers: Add 1/2 + 1/3: common denominator 6 gives 3/6 + 2/6 = 5/6 . For your own figures, use the calculator above — same method, your inputs, computed on-device.
How to use
- Enter two fractions and the operation (+, −, ×, ÷).
- Press Calculate to run the fraction calculator.
- Read the result: the simplified fraction and its decimal value.
- Press Reset to clear the fraction calculator and start again.
Why use Fraction Calculator
Fast
Calculations run in your browser. No round trip to a server.
Private
Your inputs never leave your device. Nothing is uploaded.
Free
No signup, no paywall, no ads-in-results, no watermarks.
Accurate
Based on standard, well-established formulas.
Mobile-ready
Optimised for phones, tablets, and desktops alike.
Transparent
Honest disclaimers wherever browser limits or regional rules apply.
Common uses
Use it when working through problems
Use it for verifying answers from a textbook
Fraction in research and report calculations
Use it for quick mental-math cross-checks
Fraction in competitive-exam practice
Use it for science-fair and project numbers
Technical notes
Fraction Calculator carries out the fraction arithmetic over a common denominator, then reduces the answer by the greatest common divisor.
Inputs are taken exactly as entered, so check for typos before trusting an answer.
Nothing you type is uploaded — the calculation happens entirely on your device.
FAQ
Which operations are supported?
Addition, subtraction, multiplication, and division of two fractions.
Is the answer simplified?
Yes, results are reduced to lowest terms — for example 1/2 + 1/3 = 5/6.
How do I add fractions with different denominators?
Just enter both fractions and the operation; the calculator finds a common denominator and reduces the result for you.
Does the Fraction Calculator send my data to a server?
No — the Fraction Calculator runs entirely in your browser, so the numbers you enter never leave your device.
Worked example
Add 1/2 + 1/3: common denominator 6 gives 3/6 + 2/6 = 5/6.