How to use Fraction Calculator
Add, subtract, multiply, or divide two fractions.
- Choose the operation and enter every labeled input, keeping units and the time period consistent.
- Calculate, compare the worked example below and inspect any warnings.
- Change one assumption to compare another scenario; keep the model’s limits in view.
Formula & calculation method
Addition and subtraction use a common denominator; multiplication multiplies corresponding parts and division multiplies by the reciprocal. The result is reduced using the greatest common divisor.
Input reference · 5 fields
These labels describe the calculation’s base units. Supported measurements can switch through the header’s region settings; follow the current workspace labels. Prefilled values are examples.
- First numerator
- Enter a plain number with a decimal point if needed. The workspace shows an illustrative value, not a recommendation.
- First denominator
- Enter a plain number with a decimal point if needed. The workspace shows an illustrative value, not a recommendation.
- Operation
- Choose: +, −, ×, ÷.
- Second numerator
- Enter a plain number with a decimal point if needed. The workspace shows an illustrative value, not a recommendation.
- Second denominator
- Enter a plain number with a decimal point if needed. The workspace shows an illustrative value, not a recommendation.
A quick example
1/2 + 1/3 gives 5/6.
Assumptions, edge cases & limits
- Numerators and denominators must be safe integers and denominators must be nonzero.
- Dividing by a zero-valued fraction or exceeding safe integer precision is rejected.
- Uses safe integers; very large products are rejected to avoid precision loss.
Questions about Fraction Calculator
Can I add fractions with different denominators?
Yes. Enter the two numerators and denominators and choose addition. For example, 1/2 + 1/3 gives the reduced fraction 5/6 plus a decimal approximation.
Can I enter a mixed number directly?
Use an improper fraction instead: 1 1/2 becomes 3/2. This tool expects separate integer numerators and denominators rather than a mixed-number text expression.
Are my files or inputs uploaded?
Calculation and file processing run in your browser without a processing upload. Downloads go to your device. Choosing a next-step transfer creates a temporary local copy for that workflow. Region preferences are stored separately from tool inputs. See our privacy details.
Can I use this tool for free?
Yes. No signup, subscription or payment is required to use the tool or download its output. File tools have device and size limits; a smaller batch may work better on a phone.
A result or explanation needs correcting? Tell us the tool name and an example.