About GST Calculator India
Free online calculators designed to make GST and everyday business maths simple for Indian users.
GST Calculator India provides a set of free, browser-based calculators for GST and related business calculations — adding and removing GST, splitting CGST/SGST/IGST, building quick invoices, and working out percentages and discounts.
Every calculation runs directly in your browser using JavaScript. Nothing you type is uploaded to a server, stored in a database, or shared with anyone.
Please note: GST Calculator India is an informational and calculation tool, not a government website. It is not affiliated with, endorsed by, or operated by the Government of India or the GST department. Always verify figures independently before using them for tax filing, accounting or invoicing.
Why we built this
Manually calculating GST — especially when moving between GST-inclusive and GST-exclusive amounts, or splitting CGST/SGST/IGST — is easy to get wrong under time pressure. These tools aim to make that instant and error-free, in plain rupee terms.