What this calculator does

The VAT GST Calculator helps you move between tax-exclusive and tax-inclusive pricing. You can start with a net amount and add tax, or begin with a gross amount and extract the embedded VAT or GST portion.

Why quantity is included

Many invoices and quotes are prepared from a per-item price rather than a single line total. This calculator treats the amount you enter as a per-item value so you can estimate net subtotal, gross subtotal, and tax amount for one or many units at the same time.

When this tool is useful

• Preparing retail prices that need VAT or GST added before checkout.
• Reviewing supplier invoices where tax is already included in the listed price.
• Checking product margins when you need to separate net revenue from collected tax.
• Estimating quote totals for multiple units with the same tax rate.

Things to keep in mind

Tax rules vary by country, state, and product type. This calculator applies the percentage you enter directly and does not account for exemptions, tiered rules, or local rounding requirements beyond standard currency rounding to two decimals.