Toolstia / VAT & GST calculator
VAT and GST calculator
Add tax to a price, or work backwards from a price that already includes tax. You see the price before tax, the tax amount and the price including tax.
Works for VAT, GST, sales tax or any percentage added to a price. Tax rates differ by country and by product, so check the rate that applies to you. Results are rounded to two decimals for display.
How it works
- Choose add tax or remove tax.
- Enter the price and the tax rate, or tap a common rate.
- Read the three results.
Adding tax
Multiply the price by the rate and add it. 100 plus 20% tax is 120, of which 20 is tax.
Removing tax
Divide the price by 1 plus the rate. A price of 120 that includes 20% tax is 120 / 1.2 = 100 before tax. A common mistake is to subtract 20% of 120, which gives 96 and is wrong.
Rates differ
VAT and GST rates change by country and by type of goods, and some items are exempt or zero-rated. The quick buttons are only shortcuts. Always check the rate that applies to you with your tax authority.
Rounding
Results are shown to two decimals. Invoices round each line or the total in different ways depending on local rules, so tiny differences can appear.
Questions
Is VAT the same as GST?
They work the same way: a percentage added to the price at each stage of sale. The name differs by country.
Can I use it for sales tax?
Yes, for any percentage added to a price.
Does it save my numbers?
No. Everything is calculated in your browser.
Does it work in any currency?
Yes. Results use the same unit as the price you enter.