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GST and VAT calculator

Add tax to a price or take it out of one, with India's CGST, SGST and IGST shown. Everything is calculated on your device.

Calculate

Before tax to add it, with tax to remove it.

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Result

Your result will appear here.

What it does

The GST and VAT calculator adds tax to a price or takes it out of one:

The result updates as you type.

How to use it

  1. Pick Add tax for a price before tax, or Remove tax for a price that already includes it.
  2. Type the amount.
  3. Type the tax rate as a percentage.
  4. Select Copy result to put the figures on your clipboard.

The calculator remembers your choice and numbers on this device, so they’re there the next time you open the page.

How it’s calculated

With the amount A and the tax rate r in percent, Add tax works out:

Tax = A × r ÷ 100

For 1,000 at 18%, Tax = 1,000 × 18 ÷ 100 = 180.00, and the price with tax is 1,180.00. Remove tax works out the price before tax, and the tax is the rest:

Before tax = A × 100 ÷ (100 + r)

For 1,180 at 18%, Before tax = 1,180 × 100 ÷ (100 + 18) = 1,000.00, and the tax is 180.00.

The CGST and SGST rows follow Indian GST rules: CGST is half the tax, rounded half up to whole cents, and SGST is the rest, so the two add up to the tax. IGST is the whole tax. Each figure is worked out exactly and rounded half up to whole cents once, so taking the tax out of a price this calculator added it to gives back the amount you started with.

Good to know

Privacy

Everything is calculated in your browser, on your device. Nothing you type is uploaded. Only your choice and numbers are kept, in this browser’s storage, so the page can show them again.

Frequently asked questions

What's the difference between a price with tax and a price before tax?

A price before tax (exclusive) doesn't include the tax yet, so the tax is added on top: 1,000 at 18% becomes 1,180.00. A price with tax (inclusive) already holds it, so the tax is taken out: 1,180 at 18% is 1,000.00 before tax and 180.00 tax. Pick Add tax or Remove tax to match the price you have.

Does it work for VAT as well as GST?

Yes. GST and VAT are both a percentage added to a price, so the sums are the same: type your country's rate and pick Add tax or Remove tax. The CGST, SGST and IGST rows only apply to GST in India; elsewhere, use the Tax row.

What are CGST, SGST and IGST?

Under Indian GST rules, a sale within one state carries central GST (CGST) and state GST (SGST), each at half the rate: at 18%, CGST 9% and SGST 9%. A sale between states carries integrated GST (IGST) at the full rate. The total tax is the same either way.

Why is CGST sometimes one cent more than SGST?

When the tax is an odd number of cents, it can't split evenly. The calculator rounds CGST half up to whole cents and gives SGST the rest, so the two always add up to the tax. For 1,000.05 at 18%, the tax is 180.01: CGST 90.01 and SGST 90.00.