Add or remove GST/VAT from any amount instantly.
Whether you need to add tax to a pre-tax price or work backward to find the pre-tax price from a tax-inclusive total, this calculator handles both directions with a single tax-rate input. It works for GST, VAT, sales tax, or any percentage-based consumption tax regardless of what your country calls it or what rate applies — the underlying math is the same everywhere, only the label differs.
Enter the amount and tax percentage, choose whether to add or remove tax, then tap Calculate.
What's the difference between adding and removing tax?
"Add" treats your amount as the pre-tax price and calculates the tax-inclusive total. "Remove" treats your amount as already including tax and extracts the original pre-tax price.
Does this work for any country's tax rate?
Yes — enter whatever percentage applies in your region; the math is the same regardless of what the tax is called locally.