Sales Tax Calculator

Frequently asked questions

How do I add sales tax to a price?

Choose the add mode, enter the pre-tax amount and the tax or VAT rate, and the calculator multiplies the amount by the rate to get the tax, then adds it to give the gross total. This is the standard way to find the final price a customer pays.

How do I remove tax from a total (reverse VAT)?

Choose the remove mode and enter the tax-inclusive total. The calculator divides the amount by 1 plus the rate to recover the net amount, then shows the tax portion. This is useful for extracting VAT or GST already included in a price.

Does this work for VAT and GST?

Yes. Sales tax, VAT, and GST are all percentage-based taxes, so the same math applies. Just enter the correct rate for your country or region, such as 20 percent VAT or 10 percent GST.

Can I use any currency?

Yes. The calculator only works with numbers and percentages, so it applies to any currency. Enter the amount in your own currency and read the results in the same currency.

Are compound or tiered taxes supported?

This tool applies a single flat rate. For jurisdictions that stack multiple taxes or use tiered brackets, calculate each layer separately or use the combined effective rate.