Add the numbers for your scenario.
01Freelance & Business toolCalculated result
VAT / GST Calculator
Add or remove sales tax from any price.
100% FreeRuns instantlyNo watermark
- 1Enter detailsAdd the numbers for your scenario.
- 2CalculateVootkit updates the result instantly.
- 3ReviewCheck totals, notes and breakdowns.
Private by designProcessed on your device where possible.
Works on any deviceDesktop, tablet and mobile browsers.
No installationOpen the page and start working.
Always free coreUse the free plan for everyday tasks.
How to use VAT / GST Calculator
Vootkit updates the result instantly.
02Check totals, notes and breakdowns.
03Copy the answer into your workflow.
04Your files stay private
Your work is processed locally in your browser where possible and is never added to a Vootkit upload library.
Learn more about privacyAdding tax to a price and removing it are not the same sum reversed, and getting them the wrong way round is the commonest arithmetic error in small-business bookkeeping.
What VAT / GST Calculator does
Adds tax to a net price, or extracts it from a gross one — you say which the amount already is. Defaults to 20% on 100.
Removing tax is not "subtract the percentage". To strip 20% from a gross 120 you divide by 1.20 to get 100, not subtract 20% to get 96. That mistake is off by 4% and it compounds across every line of a return.
The two directions
| Add tax | net × (1 + rate) |
|---|---|
| <strong>Remove tax</strong> | <strong>gross ÷ (1 + rate)</strong> |
| At 20%: 100 net | 120 gross |
| At 20%: 120 gross | <strong>100 net — not 96</strong> |
| Default rate | 20% |
| Knows your rate? | No — you supply it |
| Rates vary by | Country, and by product category within it |
| Not | Tax advice |
Detailed steps
- Enter the amount and say whether it already includes tax.
- Enter your rate.
- Read the net, the tax and the gross.
Worth knowing
To remove tax, divide — never subtract. Stripping 20% from a gross 120 by subtracting 20% gives 96, which is wrong; dividing by 1.20 gives the correct 100. The gap widens with the rate, and on a VAT return applied across hundreds of lines it becomes a material error rather than a rounding one.
Frequently Asked Questions
Why can I not just subtract the percentage?
Because the tax was calculated on the net amount, not the gross. 20% of 100 is 20, giving 120 — but 20% of 120 is 24. Subtracting works from the wrong base, which is why the answer comes out low.
What rate should I use?
Whatever applies where you are selling, which often depends on the product too — many countries apply reduced rates to food, books or children’s clothing. Cross-border digital sales frequently use the customer’s rate rather than yours.
Should my prices include tax?
Consumer prices are usually quoted gross and business-to-business prices net, but conventions differ by country and are sometimes legally required. Say clearly on your invoice which you have quoted.
Is this tax advice?
No. It applies a rate you supply. Registration thresholds, reverse-charge rules and cross-border obligations are genuinely complicated and need an accountant.
Is VAT / GST Calculator free?
Yes. The Vootkit free plan includes 5 tool runs a day. Upgrade to Vootkit Pro for unlimited daily use, an ad-free workspace and saved workflows.
Are my files uploaded?
No. VAT / GST Calculator runs entirely in your browser — your file is processed on your own device and never sent to a server. There is nothing for us to store or delete.
Do I need to install anything?
No. VAT / GST Calculator works in any modern browser on desktop, tablet or phone. Open the page and start.
How often can I use it? Is there a daily limit?
On the free plan you get 5 tool runs a day. When you reach the limit you'll see a prompt to upgrade, and it resets the next day. Vootkit Pro removes the cap entirely for unlimited daily use.
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This tool processes everything locally in your browser. You can disconnect from the internet after the page loads and it will still work.