Category
GST
Calculator, reverse GST, GSTIN, late fee
Everything GST in one place — add or remove GST at any slab, reverse-calculate the tax inside an inclusive price, validate a GSTIN's format and checksum, estimate the late fee and interest on a delayed return, and check e-way bill validity by distance. Built for Indian freelancers, traders and small businesses. Free, instant, and private — every calculation runs in your browser.
Picking the right GST tool
Use the GST calculator to add tax to a base price or split it into CGST and SGST, and Reverse GST when you only know the inclusive total. The GSTIN validator checks a number's format, state code and checksum before you rely on an invoice. The late-fee tool is for returns already overdue, and e-way bill validity tells you whether one bill covers the distance you are moving goods.
What a calculator cannot decide for you
The rate depends on the exact goods or service and its HSN or SAC code, and some supplies are exempt or zero-rated. When a classification is unclear, check the notification on the CBIC website or ask a GST practitioner. A format check also does not prove a GSTIN is active; confirm it on the GST portal before claiming input tax credit.