QuickFnd Calculator
GST Calculator
Calculate GST tax for products and services instantly.
GST Calculator
About GST Calculator
GST Calculator adds or removes Goods and Services Tax from any amount instantly. Select the GST rate (5%, 12%, 18%, or 28%), choose to add or extract GST, and get the complete breakdown of base amount, GST component, and total.
Why use GST Calculator?
- Add GST to a base price or extract GST from an inclusive amount — both directions.
- Supports all Indian GST slabs: 0%, 5%, 12%, 18%, and 28%.
- Shows full breakdown: base amount, GST amount, and final total.
- Useful for freelancers raising invoices and businesses verifying vendor bills.
How to use it
Enter the amount you want to calculate GST on.
Select the applicable GST rate for your goods or service.
Choose Add GST (to get total from base) or Remove GST (to extract base from total).
See the base amount, GST component, and final total instantly.
Best use cases
Raising GST invoices as a freelancer or small business
Checking how much GST is included in a vendor invoice
Estimating the final price of a purchase including 18% GST
Reconciling GST amounts for accounting and tax filing
Popular search variations
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GST Calculator Online
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GST Calculator Formula
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Free GST Calculator
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Frequently asked questions
What are the current GST slabs in India?
India's GST has five main slabs: 0% (essential items), 5% (household necessities), 12% (processed foods), 18% (most services including IT and telecom), and 28% (luxury goods, cars, tobacco).
How do I extract GST from a GST-inclusive price?
If the total is 118 with 18% GST: Base = 118 / 1.18 = 100. GST = 118 - 100 = 18. The calculator handles this automatically in Remove GST mode.
What is CGST and SGST?
In intra-state transactions, GST splits equally between CGST and SGST. For 18% GST, each is 9%. For inter-state transactions it becomes IGST at the full rate. This calculator shows total GST; your invoice software handles the split.
Who needs to register for GST?
Businesses and freelancers with annual turnover above 20 lakh rupees (10 lakh in some states) must register for GST. Below this threshold, GST registration is optional.
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