Tax calculator
Money calculator
Sales Tax Calculator
Add tax to a net price, remove tax from a tax-included total, or reverse-calculate the tax rate.
gross = net x (1 + rate)
Reverse tax rate calculator
Use net and gross amounts to find the effective tax rate and tax amount.
Tax amount
Tax rate
Net / gross ratio
Split total with tax
Estimate each person’s cost when a receipt total includes tax.
Each person pays
Sales tax formulas
| Question | Formula |
|---|---|
| Add tax | gross = net x (1 + rate / 100) |
| Tax amount | tax = net x rate / 100 |
| Remove tax | net = gross / (1 + rate / 100) |
| Reverse rate | (gross - net) / net x 100 |
Method, source and review
This calculator only adds or removes the rate you enter. Example rates are arithmetic presets, not current jurisdiction lookups. It does not determine taxability, sourcing rules, exemptions, filing obligations or deductible sales tax.
For arithmetic estimates only, not tax advice. Confirm the applicable tax base and rate with the relevant authority.
Sales tax calculator FAQ
Is sales tax the same as VAT or GST?
They are consumption taxes, but legal rules differ by region.
How do I remove tax from a total?
Divide the total by one plus the tax rate as a decimal.
Are preset rates official?
No. Verify the current local rate.
Can I split a tax-included receipt?
Yes. Enter the total and number of people.
Handy Tool Lab
How this tool is maintained
Handy Tool Lab builds and tests each tool around repeatable examples. Formula-based tools use published references when a suitable source exists; browser utilities are checked with representative inputs and output cases.