TaxTools

GST Calculator

Switch between a price before GST and the GST-inclusive total, common in Australia, Canada, India, and other GST countries.

Pre-tax amount

Tax rate

Net (pre-tax)

$100.00

Tax

$8.00

Gross (with tax)

$108.00

What you entered

Pre-tax amount: $100Tax rate: 8%

1
Tax amount
$100 × 8/100= $8
2
Gross total
$100 + $8= $108

Result

Tax: $8.00

At a 8% tax rate, the net amount is $100.00, tax is $8.00, and the gross total is $108.00.

Price including GST at common rates

Each cell adds the GST rate in the column heading to the base price. India's main slabs since 22 September 2025, 5 and 18 percent, sit in this range (a few goods pay 40 percent); Australia, New Zealand and Singapore use a single rate.

Price before tax	At 5%	At 7.5%	At 10%	At 18%	At 20%
$50	$52.50	$53.75	$55.00	$59.00	$60.00
$100	$105.00	$107.50	$110.00	$118.00	$120.00
$250	$262.50	$268.75	$275.00	$295.00	$300.00
$500	$525.00	$537.50	$550.00	$590.00	$600.00
$1,000	$1,050.00	$1,075.00	$1,100.00	$1,180.00	$1,200.00
$2,500	$2,625.00	$2,687.50	$2,750.00	$2,950.00	$3,000.00

India applies GST in slabs by product category rather than one national rate - since 22 September 2025 broadly 5% on essentials and everyday goods, 18% on most other goods and services and 40% on a few luxury and sin goods, with the old 12% and 28% slabs and the compensation cess gone. For a supply within one state the total splits equally into CGST and SGST, so an 18% rate is 9% each; for a supply across states it is a single IGST at the full rate. That split affects how the invoice is drawn, not the total the customer pays. To remove GST from a gross figure, divide by one plus the rate rather than subtracting the percentage. Registered businesses claim input tax credit on GST paid to suppliers.

GST vs. VAT

GST and VAT are functionally the same idea — a consumption tax collected at each stage of the supply chain — just branded differently by country. The math in this calculator works identically for either.

Multiple GST rates

Some countries split GST into multiple slabs (e.g. reduced rates for essentials, standard rates for most goods) — always confirm which rate applies to your specific product or service before relying on a single flat calculation.

India's GST slabs since 22 September 2025

India now has two main GST rates: 5% on essentials and everyday goods and 18% on most other goods and services, plus a special 40% rate on a few luxury and sin goods such as bigger cars, motorcycles over 350 cc, aerated drinks, yachts and private aircraft. The 56th GST Council removed the old 12% and 28% slabs and ended compensation cess, and made items such as UHT milk, Indian breads and individual health and life insurance exempt. Within one state the rate splits equally into CGST and SGST, so 18% is 9% + 9%; across states it is a single IGST. To see how a price changed, use the GST 2.0 price calculator.

Frequently asked questions

How do I calculate GST on a product?

Multiply the net price by the GST rate. For 18% GST on ₹1,000: GST = ₹1,000 × 0.18 = ₹180. Total price = ₹1,180. For CGST/SGST split: CGST = ₹90 (9%), SGST = ₹90 (9%). For interstate sales, IGST = ₹180 (18%).

How do I extract GST from a total price?

Divide the GST-inclusive price by (1 + GST rate). For 18% GST: ₹1,180 ÷ 1.18 = ₹1,000 net price. GST amount = ₹1,180 − ₹1,000 = ₹180. Never just subtract 18% from the total — that gives the wrong answer (₹967.40 instead of ₹1,000).

What is the GST rate in India, Australia, and Canada?

India: 5% or 18% for most goods and services since 22 September 2025, 40% for a few luxury and sin goods, and nil on exempt items; the old 12% and 28% slabs are gone. Australia: flat 10% GST on most goods and services (food, healthcare, and education are exempt). Canada: 5% federal GST plus 0-10% provincial PST depending on the province (or combined HST of 13-15% in some provinces).