Add or extract GST/VAT at any percentage for inclusive or exclusive pricing. Fully client-side — no account, uploads, or remote storage.
Added Apr 18, 2026 · Updated May 1, 2026
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Enter a value for amount to see your result.
Calculates GST (Goods & Services Tax) or VAT (Value Added Tax) in two modes: adding tax to an exclusive price, or extracting tax from an inclusive price. Works with any tax rate.
$100 × 10% = $10 GST; total = $110.
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If £120 includes 20% VAT: pre-tax = £120 ÷ 1.20 = £100; VAT = £20.
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Both are consumption taxes charged as a percentage of a good or service's price. GST (Goods and Services Tax) is used in countries like Australia, Canada, and India. VAT (Value Added Tax) is used in the EU and UK. The calculation method is identical.
Divide the VAT-inclusive price by (1 + rate/100). For example, to remove 20% VAT from £120: £120 ÷ 1.20 = £100 pre-tax, £20 VAT.
Use add when you know the net price and need the gross customers pay. Use extract when you only have the tax-inclusive receipt total and need to back out the tax portion for bookkeeping or margin analysis.
No. Enter one rate at a time for a line item or category. Mixed baskets need separate rows per rate or a dedicated invoicing system.
Treat results as arithmetic checks only. Filing requires correct rounding rules, invoice sequencing, reverse-charges, and exemptions defined by your tax authority.