VAT Calculator (UK)

Our VAT calculator can be used to either add VAT to the figure entered or subtract VAT to leave the non-VAT amount. The results page breaks the figures down into the net amount, the VAT portion and the gross amount. Currently VAT is calculated at 20% net amount.

Enter the net amount (excluding VAT).
£
Choose a preset or enter a custom percentage.
Net Amount
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VAT
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Gross Amount
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Item Amount
VAT calculations are arithmetic conversions only; actual VAT treatment can vary by goods/services and scheme.

About This VAT Calculator

Convert between net (excluding VAT) and gross (including VAT), and compute the VAT amount at common rates (20%, 5%, 0%) or a custom percentage.

How VAT Is Calculated

  • Net → Gross: VAT = Net × rate; Gross = Net × (1 + rate).
  • Gross → Net: Net = Gross ÷ (1 + rate); VAT = Gross − Net.
Example: £1,000 net at 20% → VAT £200 → gross £1,200. £1,200 gross at 20% → net £1,000 → VAT £200.

Quick VAT examples (20%)

Common conversions at the standard rate. Click copy to use the figures.

Net VAT (20%) Gross Copy