GST Calculator
Calculate Goods and Services Tax (GST).
GST Details
₹
%
Total Amount (with GST)
₹11,800
Base Amount₹10,000
CGST (9%)₹900
SGST (9%)₹900
Total GST₹1,800
GST %18%
Use this GST calculator to add or remove GST in seconds. It is built for Indian invoices (CGST, SGST, IGST) and also works globally when you need quick VAT/GST-style tax math.
What this calculator does
Enter amount and tax rate, choose inclusive or exclusive mode, and instantly see taxable value plus GST split.
GST formulas
Exclusive: GST = Amount x Rate/100; Inclusive: Taxable Value = Amount x 100/(100+Rate)
For intrastate supplies in India, GST is split equally into CGST and SGST.
Common GST rates in India
- 0% for exempt essentials
- 5% for mass-consumption goods
- 12% for processed products
- 18% standard slab for services and many goods
- 28% for luxury and sin-category items
How to calculate GST
- Select inclusive or exclusive GST
- Enter amount and GST rate
- If needed, choose intrastate or interstate supply
- Review tax amount and total invoice value
- Copy values to invoice or quotation
Example (exclusive GST)
Scenario: A freelancer bills Rs 50,000 at 18% GST.
Inputs
- Base amount: Rs 50,000
- GST rate: 18%
Calculation
- GST = 50,000 x 18% = Rs 9,000
- Total invoice = Rs 59,000
- Intrastate split: CGST Rs 4,500 + SGST Rs 4,500
Result: Client pays Rs 59,000 in total.
Frequently Asked Questions
Use Taxable Value = Inclusive Amount x 100/(100+Rate). The difference is GST.
Use IGST for interstate supply and exports; use CGST+SGST for intrastate supply.
Yes. The math is valid for VAT/GST systems globally; only tax labels differ.
Yes, rates depend on HSN/SAC classification and applicable notifications.