VAT & GST calculator
Invoicing needs the tax split out; pricing needs it added on. This does both, and the reverse calculation is the one people get wrong most often.
How to use the vat & gst calculator
- Enter the amount you have.
- Set the tax rate.
- Tell it whether your amount is before tax or already includes it.
How it works
Adding tax is simple multiplication: net × (1 + rate). Removing it is division: gross ÷ (1 + rate). Subtracting the percentage from a gross figure gives the wrong answer — 17% off 1,170 is 971.10, but the correct net is 1,000.
This works for any single-rate consumption tax, including VAT across Europe, GST in India, Australia, Singapore and Canada, and Pakistan's general sales tax.
Common questions
How do I remove 20% VAT from a total?
Divide by 1.2. A gross of 120 is a net of 100 and 20 of VAT.
Can I use this for reverse GST?
Yes — choose 'after tax' and it performs the reverse calculation for any rate you enter.