VAT Calculator
Add or remove VAT at any rate.
Use on any page (bookmarklet)
Want VAT Calculator without leaving the page you're on? Drag the button below to your bookmarks bar, then click it on any website to open VAT Calculator right there — it runs entirely in your browser.
Use responsibly: a bookmarklet runs on whatever page you click it on. Avoid sensitive sites such as online banking, payment, or healthcare pages — you run it at your own risk. Everything is processed locally and no data is sent anywhere. See our Terms.
- Show your bookmarks bar if it's hidden — Ctrl+Shift+B (⌘+Shift+B on Mac).
- Drag the button above onto the bookmarks bar.
- Open any website and click the bookmark — the VAT Calculator panel appears in the top-right corner. Use ✛ to move it between corners, or ›/‹ to tuck it against the edge and pull it back out.
- Click the bookmark again (or the ✕) to close it.
Note: a few sites with strict security policies may block bookmarklets.
Examples
Add 20% VAT to 100
Input
Add VAT, 100, 20%
Output
Net 100 · VAT 20 · Gross 120
Remove 20% VAT from 120
Input
Remove VAT, 120, 20%
Output
Net 100 · VAT 20 · Gross 120
About this tool
This free online VAT calculator adds or removes value-added tax at any rate. Enter an amount, choose whether it's net (add VAT) or gross (remove VAT), set the rate, and see the net, VAT, and gross figures instantly. The same math works for GST and percentage sales tax. Everything runs in your browser with no upload.
How to use
- Choose Add VAT (from a net price) or Remove VAT (from a gross price).
- Enter the amount and the VAT rate, or tap a common-rate button.
- Read the net, VAT, and gross breakdown below.
Removing VAT: divide, never subtract
This is the mistake that shows up on real invoices. VAT was added to the net price, so taking the same percentage off the gross price removes a percentage of the wrong number.
- Gross 120 at 20% → net is 120 ÷ 1.20 = 100
- Subtracting 20% instead gives 96 — understating the net by 4 and the VAT by the same
The error scales with the rate: at 25% VAT, subtracting rather than dividing is out by a full 5% of the total. Any time you are working backwards from a gross figure, the operation is division.
The VAT fraction shortcut
Accountants extract tax from a gross amount in one step using the VAT fraction: rate ÷ (100 + rate). It works directly on the total, with no need to find the net first.
- 20% → 1/6 — a sixth of any gross price is the VAT
- 25% → 1/5
- 19% → 19/119 (≈ 0.1597)
VAT, GST, and US sales tax are not the same thing
The arithmetic here applies to any percentage tax, but the systems differ in ways that matter. VAT and GST are charged at every stage of the supply chain with businesses reclaiming what they paid, and displayed prices are normally tax-inclusive. US sales tax is charged once at the final sale, and prices are almost always shown excluding it — which is why the shelf price and the till total differ. If you are adding US sales tax, you are working forwards from a net price and never need the reverse calculation at all.
Rates also vary by product within a single country: many jurisdictions apply reduced or zero rates to food, books, children's clothing, and medicine. Enter the rate that applies to the specific item rather than the headline standard rate.
Common uses
Pricing products tax-inclusive, preparing and checking invoices, reclaiming VAT from receipts, splitting a gross total into net and tax for bookkeeping, and verifying that a supplier's figures add up. For the general percentage maths behind it, see the percentage calculator; to apply a discount before tax, use the discount calculator first, since percentage discounts normally apply to the pre-tax amount.
Frequently asked questions
How do I add VAT to a price?
Multiply the net amount by the VAT rate and divide by 100 to get the VAT, then add it to the net for the gross. For 100 at 20%, VAT is 20 and the gross is 120. This calculator does it instantly.
How do I remove VAT from a gross price?
Divide the gross amount by 1 plus the rate as a decimal. For 120 at 20%, the net is 120 ÷ 1.20 = 100 and the VAT is 20. Switch to Remove VAT to do this automatically.
Why can't I just subtract 20% to remove VAT?
Because the 20% was added to the net price, not the gross one — so subtracting it takes 20% of the wrong number. On a 120 gross price at 20% VAT, the net is 120 ÷ 1.20 = 100, not 120 − 24 = 96. The correct operation is division, and the error grows with the rate: at 25% VAT, subtracting instead of dividing is off by 5% of the total. This is the single most common VAT mistake on invoices.
What is the VAT fraction and why is it useful?
It's the shortcut for extracting tax from a gross amount in one step: rate ÷ (100 + rate). At 20% that gives 1/6, so a sixth of any gross price is the VAT. At 25% it's 1/5, and at 19% it's 19/119. Accountants use these fractions because they work directly on the total without needing the net figure first.
Can I use it for GST or sales tax?
Yes. The math is the same as GST and percentage-based sales tax, so just enter your local rate.
Which VAT rates are included?
You can type any rate, and quick buttons cover common ones (5, 7.5, 10, 15, 20%). Many countries use 20%, but rates vary, so check yours.
Is my data uploaded anywhere?
No. The calculation runs entirely in your browser with no upload.
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