VAT and GST calculator
Enter a price and a rate. Get the price with tax, the price without tax and the tax itself.
Results
VAT amount
0.00
The tax inside the price.
- VAT amount
- 0.00
- Price without tax
- 0.00
- Price with tax
- 0.00
- In words
- -
| Rate | Net | Tax | Gross |
|---|
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For information only, not financial, tax or legal advice.
Last updated 2026-10-30. Method checked 2026-10-30. Methodology
This calculator adds or removes VAT, GST or sales tax at any rate. Enter a price, then say whether that price is before tax (net) or after tax (gross). It returns the other price and the tax amount. Use it to check an invoice line, find the tax inside a receipt, or see what a quoted price will cost once tax is added. Type any rate with up to 3 decimals, or tap one of the common rate buttons under the box. Pick the tax name that suits your country so the labels read correctly. Rates change, and many places have reduced rates for some goods, so check your tax authority for the rate that applies to your sale. All the figures are worked out in your browser, and nothing you type is sent anywhere.
How to use the VAT and GST Calculator
- Enter the amount and choose the currency.
- Choose whether the amount is before tax (add tax) or already includes tax (remove tax).
- Type the tax rate, or tap one of the common rates. Tip: Reduced rates exist in many places. Use the rate that applies to your item, not always the standard one.
- Read the net price, the tax and the gross price. The figure you typed is marked in the labels.
Worked example
A UK consultant checks prices at a 20% rate. All figures are GBP.
| Input | Value |
|---|---|
| Amount | GBP 250.00 |
| Amount is | Excluding tax (add tax) |
| Tax rate | 20% |
Add tax: tax = 250.00 x 20 / 100 = GBP 50.00, gross = 250.00 + 50.00 = GBP 300.00 Remove tax from 300.00: net = 300.00 / 1.2 = GBP 250.00, tax = 300.00 - 250.00 = GBP 50.00 Remove tax from 99.99: net = 99.99 / 1.2 = 83.325, which rounds to GBP 83.33 Tax = 99.99 - 83.33 = GBP 16.66, and 83.33 + 16.66 = 99.99 A common slip is 300.00 x 20% = 60.00, giving a net of 240.00. That is wrong, because the 20% was charged on the net price, not the gross price.
- Price without tax
- GBP 250.00
- VAT amount
- GBP 50.00
- Price with tax
- GBP 300.00
A receipt of AUD 110.00 including 10% GST works out to AUD 100.00 net and AUD 10.00 GST.
How the tax is worked out
Add tax: tax = net x rate / 100, gross = net + tax
Remove tax: net = gross / (1 + rate / 100), tax = gross - net
The rate is used as a percentage of the net price. At 20%, the tax on a net price of 250.00 is 250.00 x 0.20 = 50.00, so the gross price is 300.00. To go the other way you divide the gross price by 1 plus the rate. You never multiply the gross price by the rate, because the tax was charged on the smaller, net amount.
Money is handled in whole minor units, such as cents or pence, so the sums stay exact. When you add tax, the tax is rounded half up once and the gross price is the net price plus that tax. When you remove tax, the net price is rounded half up first and the tax is what is left. That way net plus tax always equals the total you typed. For 99.99 at 20%, the net price is 83.33 and the tax is 16.66.
A rate of 0 gives a tax of 0 and a net price equal to the gross. An amount of 0 gives all zeros without an error. Rates with up to 3 decimals are exact, so 7.125% is calculated as 7.125% and not rounded first. A currency with no minor unit, such as the Japanese yen, is rounded to whole units, so 1,000 at 10% gives 100 tax and 1,100 gross.
The table under the result shows your amount at a set of common rates. They are plain numbers and not a list of country rates. Rates differ by place and by type of goods, and they change, so check your tax authority for the rate that applies to you. For a sale with several lines at different rates, run each line on its own or use the invoice generator, which can set a rate per line.
Frequently asked questions
How do I take VAT out of a total?
Divide the total by 1 plus the rate as a decimal. For a total of 300.00 at 20%, divide by 1.2 to get a net price of 250.00. The tax is the total minus the net price, which is 50.00. At 5% you divide by 1.05, and at 18% you divide by 1.18. Choose Including tax (remove tax) in the calculator and it does the same steps for you, with the rounding handled.
Are VAT, GST and sales tax the same thing?
The sums are the same, but the systems differ. VAT and GST are charged at each step of a supply chain, and a registered business can usually reclaim what it paid on its own purchases. US style sales tax is normally charged once, on the final sale to the buyer. The names vary by country, so this calculator lets you pick the label that matches your paperwork. Adding or removing the tax uses the same formula in every case.
Which rate should I enter?
Enter the rate that applies to the specific item or service in the place where the sale is taxed. Many countries have a standard rate plus reduced rates for things like food, books or medicines, and some items are zero rated or exempt. The rate buttons are only shortcuts for common numbers. If you are unsure which rate applies, check your tax authority or ask an accountant.
Why is my invoice a cent different from the result?
Rounding is the usual cause. If tax is worked out on each line and every line is rounded, the sum can differ by a cent or two from tax worked out once on the subtotal. This calculator rounds once for the amount you enter. When you remove tax, the net price is rounded first and the tax is the difference, so the two parts always add up to the total you typed.
Can I use a rate with decimals?
Yes. The rate box accepts up to 3 decimal places, so a rate such as 7.125% works and is shown as typed. The result is still rounded to the smallest unit of the currency, such as cents or pence. Currencies with no minor unit, such as the Japanese yen, are rounded to whole units. A rate of 0 is allowed and returns a tax amount of zero.
Guides for this tool
Sources
- GOV.UK: VAT rates checked 2026-10-30
- European Commission: VAT checked 2026-10-30