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Free Online Fraction Calculator

Add, subtract, multiply or divide two rational numbers.

Your input stays on this device. Processing is bounded; regex runs in a worker with a two-second timeout.

Result



How to use Fraction Calculator
Add, subtract, multiply or divide two rational numbers. The result includes the applied formula. Numeric calculations use finite real numbers and enforce input limits.
  1. Set First fraction.
  2. Set Second fraction.
  3. Set Operation.
  4. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Add, subtract, multiply or divide two rational numbers. The example below demonstrates First fraction; Second fraction; Operation.
Example input:
{
  "a": "1/2",
  "b": "1/3",
  "operation": "add"
}
Expected result (relevant fields):
{
  "result": "5/6"
}
Features & result limitations
The result includes the applied formula. Numeric calculations use finite real numbers and enforce input limits.
Frequently asked questions
What inputs does Fraction Calculator accept?
First fraction; Second fraction; Operation
How should I interpret the Fraction Calculator result?
The result includes the applied formula. Numeric calculations use finite real numbers and enforce input limits.
Where does Fraction Calculator process my data?
Inputs are processed locally in your browser. Submitted text is not sent to external services. A successful-run event increments an aggregate tool counter without your input.