Sales Tax Calculator
Free GST, VAT and sales tax calculator. Add tax to a net price or remove it from a tax-inclusive price, with quick-pick rates and a CGST/SGST split. Private.
- No upload — 100% private
- Instant, on your device
- Free, no sign-up
- Works offline once loaded
How it works
How to use Sales Tax Calculator
Choose Add tax for a price before tax, or Remove tax for a price that already includes it.
Enter the amount.
Type a tax rate or tap a quick-pick rate such as 5%, 18% or 20%.
Read the net amount, tax amount and gross total, and copy the breakdown if you need it.
Why use it
Why use our Sales Tax Calculator tool
Add or remove tax
Go from net to gross, or back out the tax hidden in an inclusive price with the correct formula.
Quick-pick rates
One tap for common rates: 5%, 10%, 12%, 15%, 18%, 20% and 28% — or type any rate.
GST, VAT or sales tax
Switch the label to match your country; the maths is the same for every consumption tax.
CGST + SGST split
For Indian GST, see the intra-state tax split equally between central and state GST.
Nothing leaves your device
Invoices and prices are calculated in your browser and never sent anywhere.
FAQ
Frequently asked questions
How do I add GST or VAT to a price?
Multiply the net price by the rate and add it on: gross = net × (1 + rate ÷ 100). 100 plus 18% GST is 100 + 18 = 118.
How do I remove GST or VAT from an inclusive price?
Divide by (1 + rate ÷ 100). A price of 118 including 18% GST is 118 ÷ 1.18 = 100 before tax, so the GST is 18. Simply taking 18% of 118 (21.24) is wrong.
What VAT fraction should I use for 20% VAT?
For 20% VAT the tax is one sixth (1/6) of the VAT-inclusive price. £120 including VAT contains £20 of VAT. The calculator does this for any rate automatically.
What are CGST and SGST?
In India, GST on a sale within one state is split equally into Central GST and State GST. An 18% rate becomes 9% CGST plus 9% SGST. Inter-state sales use a single IGST at the full rate.
Why isn't my US state's rate listed?
US sales tax is set by states, counties and cities, so the combined rate depends on the exact address. Type your total rate, for example 8.875% for New York City.
How are the amounts rounded?
Results are shown to two decimals, rounding half up. Some tax authorities round per line item rather than per invoice, which can change a total by a cent.
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