Free Online VAT Calculator
Type the tax rate (0–100%), the net amount or the gross total including VAT and get the breakdown instantly. Right next to it, a scientific calculator for extra operations.
Office Tools' calculator instantly returns the net amount, the tax amount and the gross total. You type the rate (0–100%) and fill in either the net amount or the gross total with tax: the breakdown adapts to VAT, GST or any value-added tax. Included in the free Starter plan.
Net amount
€100.00
VAT (21%)
€21.00
Gross with VAT
€121.00
Example with 21% typed in the percentage field and a net amount of €100 (you can use any rate between 0 and 100%).
How to calculate VAT in 3 steps
- 1
Type the tax rate
Enter the rate that applies (for example 20, 10 or 7.5), between 0 and 100%. You can use a comma or a dot as the decimal separator. The breakdown updates instantly.
- 2
Enter the amount
Type the net amount (without tax) or the gross total including tax: the tool works both ways depending on which field you fill in.
- 3
Get the full breakdown instantly
See net, tax and total without extra steps: everything updates in real time as you type.
What can you calculate with this tool?
A bidirectional calculator for VAT, GST or any value-added tax with one rate per line. Designed for freelancers, SMBs and teams that need the exact breakdown between net, tax and gross: start from the net or the gross figure and get the rest instantly.
Calculate from the net amount
Enter the net price (excluding VAT) and get the VAT and gross amount instantly. Ideal for issuing invoices.
Calculate from the gross price including VAT
Start from the final price and extract the net amount and the tax. Useful to compare supplier prices or log purchases.
Built-in scientific calculator
Use √, x², percentages and chained operations before calculating VAT. Perfect for accountants and operations managers.
- ✓
Bidirectional calculation
Fill in either the net amount or the gross with tax: the other figure is calculated for you
- ✓
Any rate (0–100%)
A single field for the VAT, GST or any other tax rate; accepts comma or dot decimals
- ✓
Built-in scientific calculator
Right next to the tax block: √, x², %, 1/x and chained operations
- ✓
Real-time results
Tax and totals update as you type, with no calculate button
- ✓
Mobile-friendly
Native numeric keyboard on iOS and Android
- ✓
Free Starter account
Sign up for free in seconds and use it without installing anything
What you'll see in the tool
On the right-hand panel you have the VAT/tax block: a field for the rate and two fields for net amount or gross with tax. On the left, the scientific calculator. Statutory rates depend on each country; you type the value that applies (between 0 and 100%).
Examples you can type in the % field
These are not app buttons: they are common rates that many users type manually.
- 20 — common standard rate in many countries and regions.
- 10 — example of a reduced rate in several markets.
- 4 — or other values (e.g. 7.5 or 21) when your local rules or simulation require it.
Who uses the Office Tools VAT calculator?
Freelancers and contractors
Need: Invoice with the correct tax without rounding errors
Check net, tax and total at the rate that applies before closing the invoice
Procurement and operations
Need: Compare prices with and without tax in quotes
Start from the gross total or the net to align figures with suppliers
Finance and admin teams
Need: Quick verification of amounts in reports or orders
Combine the VAT breakdown with the scientific calculator to review line items
Frequently asked questions
Does this calculator work for any country?
Yes. The calculation of value-added tax (VAT, GST or other names) follows the same logic: type the rate that applies in your country (between 0 and 100%) and the tool breaks down net, tax and total.
How is the net amount calculated from the gross price?
Divide the gross price by (1 + t/100), where t is the rate. For example, with 21%: net = gross / 1.21. If the gross is 121, the net is 100 and the tax is 21. The calculator does this automatically when you fill in the gross field.
Do I have to pick 21%, 10% or another fixed value from a dropdown?
No. The interface has a text field for the rate: you type the exact rate (for example 20, 10, 4 or 7.5). There is no dropdown with preset rates.
Is the VAT calculator free?
Yes, it is included in Office Tools' free Starter plan. Create a free account to use it in your browser, with no software to install.
Can I start from the gross total including tax?
Yes. Fill in the gross field and you'll see the net amount and the tax instantly. You can also start from the net and get the tax and total.
What does the screen include besides the VAT block?
A scientific calculator on the same page (√, x², percentages, 1/x, chained operations), useful to review amounts before or after the tax.
Related tools
Start calculating VAT in seconds
No installation. Free Starter plan always available.
Over 10,000 calculations made this month