Calculators
GST Calculator India
Add or remove GST at any Indian slab in seconds. Split into CGST + SGST for intra-state and IGST for inter-state sales.
Total Amount
₹0.00
- Base price
- ₹0.00
- GST (18%)
- ₹0.00
- CGST
- ₹0.00
- SGST
- ₹0.00
- IGST (inter-state)
- ₹0.00
About GST Calculator
GST (Goods and Services Tax) replaced multiple indirect taxes in India from 1 July 2017 and is collected at four main slabs: 5%, 12%, 18% and 28%. Knowing how to add GST to a base price — or back-calculate the base price from a GST-inclusive total — is critical for shopkeepers, freelancers, consultants and small e-commerce sellers.
Our GST Calculator does both: enter an amount, pick a slab, and the tool instantly shows the GST amount and the net or gross value. For intra-state sales, GST is split equally between CGST (Central GST) and SGST (State GST). For inter-state sales, the same total is collected as a single IGST. We show all three breakdowns so you can fill any tax invoice without a second thought.
How to use the GST Calculator
- 1Enter your amount (in ₹).
- 2Pick the applicable GST slab: 5%, 12%, 18% or 28%.
- 3Choose whether the amount already includes GST or you want to add it.
- 4Read the gross total, GST component, and CGST/SGST/IGST split.
Why use our GST Calculator
- Supports all four GST slabs used in India.
- Adds GST to a base price or extracts it from a tax-inclusive total.
- Splits into CGST + SGST + IGST for invoice-ready numbers.
- Runs entirely in your browser — your figures never leave your device.
Frequently asked questions
How is GST calculated in India?
GST = (Base price × GST rate) ÷ 100. To extract GST from a GST-inclusive amount, GST = Total − (Total × 100 ÷ (100 + rate)).
What is the difference between CGST, SGST and IGST?
For sales inside the same state, total GST is split equally between CGST and SGST. For sales across states, the same percentage is charged as a single IGST that goes to the central government and is later settled with states.
Which GST rate applies to my product?
Most digital services, restaurants, and standard goods use 18%. Essentials use 5%, processed foods and electronics often use 12% or 18%, and luxury items use 28%. Always verify with your CA or the CBIC rate finder.
Is this GST calculator free?
Yes. CodeMyindia's GST Calculator is 100% free, has no signup, and works offline once the page is loaded.