VAT / Tax Calculator

Instantly calculate net, gross, and tax amounts. Add tax to a net price, or extract it from a gross price.

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Results

Net Price (Excl. Tax) $0.00
Tax Amount (20%) +$0.00
Gross Price (Incl. Tax) $0.00

How to use the VAT / Tax Calculator

  1. Enter your tax rate as a percentage. Any rate works, so it suits VAT, GST or sales tax in any country.
  2. Type either the net amount to add tax, or the gross amount to extract the tax that is already included.
  3. Read the net, tax and gross figures, and copy them if you need to paste them into a quote or a spreadsheet.

When to use it

The awkward case is always the backwards one: a customer quotes a tax-inclusive budget and you need to know the net you will actually keep, or a receipt shows only the total and you need the tax line for your books. Adding tax is easy in your head; removing it correctly is not, because dividing by the rate, not multiplying, is the right operation.

The formulas

With the rate r as a percentage: from a net figure, tax = net × r ÷ 100 and gross = net + tax. From a gross figure, net = gross ÷ (1 + r ÷ 100) and tax = gross − net. The second pair is the one people get wrong, because gross × r ÷ 100 looks like the tax but is not: it applies the rate to a number that already contains the tax. The calculator picks the right pair from the "I have the net price / gross price" switch.

Worked example

At a 20% rate, a net price of $500 carries $100 of tax and a gross of $600. Going the other way, a receipt for $600 gross contains 600 ÷ 1.20 = $500 net and $100 tax. The common wrong answer, 600 × 0.20 = $120, would overstate the tax by $20 and understate the net by the same amount; on a month of receipts that error compounds into a wrong return. At a 10% rate the same $600 gross is $545.45 net and $54.55 tax, and the size of the multiply-instead-of-divide error grows with the rate: $5.45 at 10%, $20 at 20%.

Common mistakes

When this calculator is the wrong tool

It converts one amount at one rate. Income tax, with brackets and allowances, is a different calculation and does not belong here. An invoice with several lines at different rates needs each line worked separately, or the Invoice Maker, which applies a rate to the whole document. For deciding a price that leaves a target profit after tax, take the net price into the Profit Margin & Markup Calculator.

Good to know

Extracting tax from a gross figure uses gross ÷ (1 + rate), not gross × rate. The calculator does that for you. It does not know which rate applies to which product in your country, so check the correct rate before quoting.

Frequently Asked Questions

How do I calculate VAT or sales tax from a total price?

Enter the gross amount and tax rate into the VAT / Tax Calculator, switch to "extract tax" mode, and it instantly shows the net amount and the tax portion.

How do I add tax to a net price to get the gross price?

Switch to "add tax" mode, enter the net amount and tax rate, and the calculator shows the tax amount and final gross price.

Does this work for any country's VAT or sales tax rate?

Yes — the tax rate is a field you set yourself, so it works for any VAT, GST, or sales tax percentage.

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