Saved
Finance & money·Tax

GST / VAT Calculator

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

Quick examples

Input

Result

Enter a value for amount to see your result.

How it works

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.

Step by step

  1. 01Enter the amount and tax rate.
  2. 02Choose 'Add tax' if your amount is already the pre-tax price and you want to find the total.
  3. 03Choose 'Remove tax' if your amount already includes tax and you want to find the pre-tax price.
  4. 04The tool shows pre-tax amount, tax amount, and total.

Examples

Add 10% GST to $100

$100 × 10% = $10 GST; total = $110.

Inputs

Amount:
100
Tax rate:
10
Calculation mode:
add

Result

Pre-tax amount:
100
Tax amount:
10
Total (incl. tax):
110

Remove 20% VAT from £120

If £120 includes 20% VAT: pre-tax = £120 ÷ 1.20 = £100; VAT = £20.

Inputs

Amount:
120
Tax rate:
20
Calculation mode:
remove

Result

Pre-tax amount:
100
Tax amount:
20
Total (incl. tax):
120
Note: GST rates vary by country: Australia 10%, Canada 5%, India 18%, Singapore 9%. VAT rates vary in the EU: UK 20%, Germany 19%, France 20%.

Related guides

  • How to Calculate GST and VAT

    Learn how to calculate GST (Goods and Services Tax) and VAT (Value Added Tax), add tax to a price, extract tax from a gross amount, and understand.

  • Gross vs Net Price After Tax

    Gross vs Net Price After Tax -- Net usually means before tax; gross includes tax -- or the opposite in payroll! In retail, clarify whether a shelf tag is VAT.

  • GST Inclusive vs Exclusive Pricing

    GST Inclusive vs Exclusive Pricing -- Some jurisdictions display tax inclusive shelf prices; B2B invoices may show exclusive lines plus VAT/GST lines.

Frequently asked questions

What is the difference between GST and VAT?

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.

How do I remove VAT from a price?

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.

When should I use add mode vs extract mode?

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.

Does this handle multiple VAT bands (reduced rates) on one basket?

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.

Are GST/VAT outputs suitable for filing returns?

Treat results as arithmetic checks only. Filing requires correct rounding rules, invoice sequencing, reverse-charges, and exemptions defined by your tax authority.