Free Sales Tax Calculator
Add or Remove Tax in Seconds
Enter any amount and tax rate to instantly calculate the tax and total price — or reverse it to strip tax out of a total. Works with any custom rate.
What Is a Sales Tax Calculator?
A Sales Tax Calculator helps you find the tax amount on any price, or reverse-extract the base price from a tax-inclusive total. Unlike a GST calculator tied to fixed slabs, this tool lets you enter any custom rate — making it useful for general sales tax, VAT, service tax, or any percentage-based levy. Choose 'Add Tax' to go from base to total, or 'Remove Tax' to go from total back to base.
How to Use the Sales Tax Calculator
Step 1 — Choose Mode
Select 'Add Tax' to calculate the total price including tax, or 'Remove Tax' to extract the base price from a tax-inclusive total.
Step 2 — Enter Amount & Tax Rate
Type the amount (base price or total price) and enter the applicable tax rate percentage. The default is 10%.
Step 3 — Read the Results
See the base amount, tax amount, and total amount broken down clearly. Use Reset to start a new calculation.
Who Uses This Sales Tax Calculator?
Small Business Owners
Quickly add the correct tax to invoices without manual arithmetic.
Shoppers & Consumers
Check how much of a quoted price is tax before making a purchase decision.
Accountants
Extract base amounts from tax-inclusive figures for bookkeeping entries.
Freelancers
Add service tax to client quotes and see the final billable amount instantly.
Frequently Asked Questions
What is the difference between this and a GST calculator?
GST (Goods and Services Tax) is a specific Indian tax with fixed slabs (5%, 12%, 18%, 28%) that splits into CGST and SGST. This sales tax calculator works with any custom rate and does not split into components — ideal for general tax calculations, non-GST taxes, or international use.
How do I remove tax from a price that already includes tax?
Switch to 'Remove Tax' mode, enter the total (tax-inclusive) price, and enter the tax rate. The calculator divides the total by (1 + rate/100) to give you the original base price.
What tax rates can I use?
You can enter any rate — whole numbers like 10, 15, or 20, or decimals like 7.5 or 12.5. The calculator supports any positive percentage.
Is this calculator accurate for Indian taxes?
For basic sales tax or VAT calculations, yes. For GST specifically, use our dedicated GST Calculator which handles CGST/SGST splits automatically.
Can I use this for service tax calculations?
Yes. Enter the service amount and the applicable tax rate. The tool will compute the tax amount and total payable.
Is this tool free?
Yes, completely free with no registration required.