What is the GST / VAT Calculator?
Add or remove GST/VAT and show the tax amount and net price. Use it for a quick, transparent result, then review the method and boundaries below before relying on the answer.
Formula
The calculator keeps full precision during the calculation and rounds the displayed result for readability.
Practical example
At 15% tax, a net price of $200 produces $30 tax and a $230 gross total.
How to use this in Excel
Place the inputs in the cells referenced below, enter the formula, and apply the appropriate number format.
Add tax: =A2*(1+B2); extract tax: =A2*B2/(1+B2)Review units and cell references before copying the formula down a worksheet.
Common mistakes and limitations
- Subtracting the rate directly to remove included tax.
- Mixing percentage values and decimals.
- Ignoring item-level rounding rules.
Important limitation: Tax rules, exemptions, rounding and invoice requirements vary by jurisdiction. This tool performs arithmetic only.
Frequently asked questions
How does the GST / VAT Calculator work?
Tax-inclusive total = net price × (1 + rate); tax extracted from a gross price = gross × rate ÷ (1 + rate).
Can I use the GST / VAT Calculator in Excel?
Yes. A practical Excel formula is Add tax: =A2*(1+B2); extract tax: =A2*B2/(1+B2). Check cell references and format percentage or date results appropriately.
What should I check before using the result?
Tax rules, exemptions, rounding and invoice requirements vary by jurisdiction. This tool performs arithmetic only.
Does TechShift Digital store my entries?
The calculation runs in your browser. This update does not add a server-side submission or account requirement; avoid entering sensitive information on shared devices.
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