India GST Calculator

Add or remove GST at India’s 18% standard rate — net, GST and gross, instantly. Free, no signup.

GST rate
Net
₹1,000.00
GST @ 18%
₹180.00
Gross
₹1,180.00

GST in India: the essentials

  • Standard rate: 18% (slabs of 0/5/12/18/28%)
  • Registration: ₹40 lakh turnover for goods, ₹20 lakh for services (₹20L/₹10L in special-category states)
  • Return: GSTR-3B, filed monthly (or quarterly under QRMP) with GSTN
  • E-invoicing: IRN/e-invoice mandatory on B2B invoices once turnover exceeds ₹5 crore
  • Corporate tax: 22% base rate for domestic companies (u/s 115BAA); 15% for new manufacturers

How to calculate GST in India

  1. Enter the amount. Type the amount — your net figure to add GST, or a tax-inclusive figure to remove it.
  2. Choose add or remove GST. Switch between adding GST to a net price and backing it out of a gross price.
  3. Pick the rate. Select the GST rate (default 18%).
  4. Read the result. See the net, GST amount and gross total update instantly.

Stop calculating GST by hand

KARR applies India’s GST automatically on every invoice, tracks the registration threshold, and prepares the return — flagging non-compliance before you file.

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Frequently asked questions

What is the GST rate in India?

The standard GST rate in India is 18% (slabs of 0/5/12/18/28%).

How do I calculate GST in India?

To add GST, multiply the net amount by the rate. At 18%, a 1000 net becomes 1180.00 gross. To remove GST from a tax-inclusive price, divide it by 1.180. This calculator does both instantly.

When must I register for GST in India?

Registration: ₹40 lakh turnover for goods, ₹20 lakh for services (₹20L/₹10L in special-category states), filed with GSTN.

Is this India GST calculator free?

Yes — it is completely free, needs no signup, and runs entirely in your browser. For automatic GST on every invoice and one-click returns, try KARR.

Read the full India GST & tax guides →

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Rates shown reflect India’s published GST rates and are provided for guidance only — confirm the rate for your specific supply. Not tax advice.