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Free Online Sales Tax Calculator

Calculate tax and total from a pretax price.

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

Result



How to use Sales Tax Calculator
Calculate tax and total from a pretax price. The result includes the applied formula. Numeric calculations use finite real numbers and enforce input limits.
  1. Set Pretax price.
  2. Set Tax percentage.
  3. Run the tool, review the result and its stated limitations, then copy or download if needed.
Example & practical use
Calculate tax and total from a pretax price. The example below demonstrates Pretax price; Tax percentage.
Example input:
{
  "a": 100,
  "b": 10
}
Expected result (relevant fields):
{
  "result": 110,
  "tax": 10
}
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 Sales Tax Calculator accept?
Pretax price; Tax percentage
How should I interpret the Sales Tax Calculator result?
The result includes the applied formula. Numeric calculations use finite real numbers and enforce input limits.
Where does Sales Tax 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.