How to use this VAT calculator
- Enter the amount. Type the price you are starting from, e.g. 100. The currency does not matter, the calculator works with the plain number.
- Enter the VAT rate. Type the percentage that applies, such as 20 for standard UK VAT, or use a quick-pick button for 5, 17 or 20.
- Pick add or remove. Choose “Add VAT” when your price is net (before VAT) and you want the total, or “Remove VAT” when your price already includes VAT and you want to pull it back out.
- Read the three cards. Net is the price excluding VAT, VAT amount is the VAT portion, and Gross is the full VAT-inclusive total. They recalculate instantly as you type.
Nothing is submitted or stored: the numbers never leave your device, so you can check quotes, receipts and invoices privately.
How VAT is added and removed
VAT is a flat percentage applied to a price, so two small formulas cover every case. To add VAT to a net price: VAT = net × (rate ÷ 100) and gross = net × (1 + rate ÷ 100). With a net of 100 at 20%, that is 100 × 0.20 = 20 VAT and a 120 gross.
To remove VAT that is already inside a gross price, you cannot simply take the percentage of the gross, you have to divide it out: net = gross ÷ (1 + rate ÷ 100), then VAT = gross − net. For a gross of 120 at 20%, that is 120 ÷ 1.20 = 100 net and 20 VAT. A common mistake is taking 20% of 120 (which gives 24), that overstates the VAT, because the 20% was charged on the net 100, not the 120 total.
VAT and GST work the same way
The names differ by region but the maths is identical. Across Europe, the UK and much of the world it isVAT (Value Added Tax). In Australia, India, New Zealand, Singapore and Canada it is usually calledGST (Goods and Services Tax). Both are a flat percentage added to a price, so whichever applies to you, type the rate and this tool handles it the same way. Enter 10 for Australian GST, 18 for a common Indian GST slab, or 20 for standard UK VAT, the calculation does not change.
Common real-world uses
- Quoting a client: add VAT or GST to a net fee so you can show the all-in price.
- Reading a receipt: remove the VAT from a gross total to see exactly how much was VAT.
- Bookkeeping: split a VAT-inclusive expense into its net and VAT parts for your records.
- Pricing products: work backwards from a target shelf price to the net amount you actually keep.
Frequently asked questions
How do I add VAT to a net price?
Pick "Add VAT (amount is net)", enter the net price and the rate, and the calculator multiplies the price by the rate to get the VAT, then adds it on. For example, 20% VAT on 100 gives 20 in VAT and a 120 gross total.
How do I remove VAT from a gross price?
Choose "Remove VAT (amount is gross)" and enter the VAT-inclusive price. The calculator divides by 1 plus the rate to recover the net, then shows the VAT that was included. A 120 price at 20% gives a 100 net and 20 of VAT.
Is VAT the same as GST?
For this calculator, yes. VAT and GST are both a flat percentage added to a price, so the same maths works for both. Just type whichever rate applies to you.
Does it handle decimal rates like 7.5% or 17.5%?
Yes. Both the amount and the rate accept decimals, so unusual VAT rates and prices like 19.99 work perfectly. Results are rounded to two decimal places for display.
Which currency does it use?
None in particular, it is currency-neutral. Whatever number you enter is treated as a plain amount, so the net, VAT and gross all come out in the same currency you typed.
Results are rounded for display; for invoices, filings or accounting, double-check critical figures against official VAT rates.