VAT Calculator
Add or remove VAT — at 20%, 5%, or 0%.
How to Use This Calculator
Add VAT tab
Enter the net amount (price before VAT) and select the VAT rate from the dropdown. The calculator instantly shows the VAT amount and gross total. Use this when you know the ex-VAT price and need to work out the VAT-inclusive figure for an invoice or receipt.
Remove VAT tab
Enter the gross amount (price including VAT) and select the VAT rate. The calculator instantly breaks down the net amount and the VAT portion. Use this when you have a VAT-inclusive total and need to extract the VAT — for example, reclaiming input VAT on a business expense.
Instant result
Results update as you type — no need to press a button. Switch between Add and Remove tabs to calculate in either direction.
Share your result
Every input is encoded in the URL. Click Share, send the link — they'll see your exact numbers. No re-entering, no screenshots.
The Formula
VAT is a percentage added to the net price. To reverse it, divide by 1 plus the rate expressed as a decimal.
Remove VAT: Net = Gross ÷ (1 + Rate)
VAT amount: VAT = Gross − Net
Shortcut: VAT at 20% = Gross ÷ 6
Example
Adding VAT to an invoice
A freelancer invoices a client for £500 plus VAT at the standard rate of 20%.
Removing VAT from a gross amount
A receipt shows £600 including VAT at 20%. To find the net price and VAT portion:
Reduced rate — energy bill
A £1,000 domestic energy bill includes VAT at the reduced rate of 5%.