GST calculator online (India)
Add GST to a base amount, or remove GST from an inclusive amount.
Examples
Add 18% GST to 1,000 → GST 180, total 1,180.
Remove 18% GST from 1,180 → base 1,000, GST 180.
FAQ
How to add GST to a price?
Total = base × (1 + rate/100).
How to remove GST from an inclusive price?
Base = total ÷ (1 + rate/100).
What is GST in India?
GST (Goods and Services Tax) is an indirect tax used in India. Many prices are shown either as exclusive (GST added later) or inclusive (GST already included). That’s why people commonly search for a GST calculator to quickly convert between base price, GST amount, and total.
How to calculate GST
If you have a base amount and want the total price, you add GST. If you have the final bill amount and want the original base amount, you remove GST. This tool supports the most common GST slabs: 0%, 5%, 12%, 18%, and 28%.
GST formulas
Add GST: total = base × (1 + rate/100)
Remove GST: base = total ÷ (1 + rate/100)
GST amount = total − base
Why use this GST calculator online?
It reduces calculation errors, especially when removing GST from an inclusive price (this is where most manual mistakes happen). Use it for invoicing, budgeting, and quick checks when you see GST-inclusive MRP or totals.