Loading…
Add, subtract, multiply, divide fractions with exact math.
➗ Simplifies results to lowest terms. Uses exact fraction arithmetic, not decimals.
This calculator performs exact arithmetic on fractions — add, subtract, multiply, and divide. Results are automatically simplified to lowest terms and shown as both a fraction and a decimal.
Fractions give exact answers where decimals round off. In carpentry, cooking, engineering, and music theory, fractions are the natural language. A measurement of 1/3 inch is more precise than 0.33 inch — and a fraction calculator prevents accumulation of rounding errors.
The Fraction Calculator lets you figure out fraction calculatorinstantly, without reaching for a spreadsheet or doing the math by hand. Whether you're planning a budget, checking a loan, or working through homework, the tool applies the correct formula behind the scenes and shows the result the moment you enter your numbers.
Unlike a static chart or table, this calculator adapts to your exact inputs. You can adjust any value and see the outcome update in real time, which makes it easy to compare scenarios — for example, "what if the rate were 1% lower?" or "what if I paid an extra $50 a month?"
Common uses: people reach for this tool when they need to find a fraction calculator with steps, add subtract multiply divide fractions, simplify fractions calculator, or fractions with exact math.
Browser-based tools like this one have a few real advantages over installed software or manual methods:
The Fraction Calculator is based on the following formula:
a/b ± c/d = (a·d ± b·c) / (b·d) a/b × c/d = (a·c)/(b·d)
Variables: a, c = Numerators of the two fractions b, d = Denominators (nonzero) ± = Add or subtract, matching the operation
Add/subtract with a common denominator, multiply numerators and denominators. Results are reduced to lowest terms by dividing out the greatest common divisor.
Worked example: Step 1: Add 1/3 + 1/4. Step 2: Numerator = (1 × 4) + (3 × 1) = 7; denominator = 3 × 4 = 12. Step 3: GCD(7, 12) = 1, so 7/12 is already in lowest terms. Result: 1/3 + 1/4 = 7/12 ≈ 0.583.
More tools you might find useful