GST Calculator
Add GST to a base price, or extract it from a GST-inclusive total. CGST+SGST for intra-state, IGST for inter-state.
Calculate GST in India — add GST to a price or extract GST from a GST-inclusive total, at the current rates (5%, 18% or 40%), the older 12% and 28% rates for invoices dated before 22 September 2025, or any custom rate. See the CGST/SGST split for intra-state supply and IGST for inter-state.
Rates: Indian GST slabs. CGST+SGST for intra-state supply, IGST for inter-state.
How to use the GST Calculator
- Enter the amount.
- Pick the GST rate (5%, 18%, 40%, an older 12% or 28% rate, or custom).
- Get the GST, the split (CGST+SGST or IGST) and the total.
Frequently asked questions
How do I calculate 18% GST?
For intra-state supply: GST = 18% of the base, split as 9% CGST + 9% SGST. Enter the amount above and it is done for you.
How do I remove GST from a total?
Base = total / (1 + rate/100). Enter the GST-inclusive price and choose 'remove GST'.
What is the difference between CGST, SGST and IGST?
CGST + SGST apply to sales within one state; IGST applies to inter-state sales. The total tax is the same.
What are the GST rates in India?
Since 22 September 2025 the main GST rates are 5% and 18%, with 40% for luxury and sin goods; 0.25% (rough diamonds) and 3% (gold, silver) are unchanged. The 12% and 28% slabs were removed, with most items moving to 5% and 18%.
Fun facts about GST Calculator
- GST (Goods and Services Tax) was introduced in India on July 1, 2017, replacing a complex system of 17 indirect taxes and 23 cesses.
- Since 22 September 2025, India's GST has two main rates, 5% and 18%, plus 40% for luxury and sin goods; the 12% and 28% slabs were removed.
- Over 160 countries have implemented some form of GST or VAT (Value Added Tax), making it one of the most widespread tax systems in the world.
- France was the first country to implement VAT (a precursor to GST) in 1954 — it was designed by Maurice Lauré, a French tax official.
- GST is a 'destination-based' tax — it's collected where the goods or services are consumed, not where they're produced.