GST Calculator
Add GST to a price or remove GST from a GST-inclusive amount (reverse GST). See the net value, total, and the CGST + SGST split instantly.
Calculation type
GST rate
Net amount
₹10,000
GST (18%)
₹1,800
Total amount
₹11,800
CGST
₹900
9% (intra-state)
SGST
₹900
9% (intra-state)
Add GST formula
Total = Amount × (1 + rate/100)
GST = Amount × rate/100. Example: ₹10,000 × 18% = ₹1,800 GST → ₹11,800 total.
Remove GST formula
Net = Total ÷ (1 + rate/100)
GST = Total − Net. Example: ₹11,800 ÷ 1.18 = ₹10,000 net → ₹1,800 GST.
How the GST calculator works
GST (Goods and Services Tax) is a single indirect tax on the supply of goods and services in India, charged at 5%, 12%, 18% or 28%. Use Add GST when you have a pre-tax price and want to know the final amount, or Remove GST (reverse GST) when a price already includes tax and you need the taxable value — useful for invoices and input-tax-credit calculations.
For sales within a state the tax splits equally into CGST and SGST; for inter-state sales the same amount is charged as IGST. The total tax is identical — only who collects it changes.
Frequently Asked Questions
Related Finance Calculators
EMI Calculator
Calculate loan EMI, interest & prepayment savings.
SIP Calculator
Estimate mutual fund SIP returns & step-up growth.
New vs Old Tax Regime
Compare income tax under both regimes & save more.
In-Hand Salary Calculator
Find your monthly take-home salary from CTC.
HRA Exemption Calculator
Calculate your tax-exempt house rent allowance.