GST Calculator
Add or remove GST from any amount with instant tax breakdown.
Overview
This tool adds or removes GST from an amount using the selected tax slab. Adding GST computes the tax-inclusive price from a base amount. Removing GST (reverse calculation) extracts the base amount and tax portion from a tax-inclusive total. Both directions are common in Indian business invoicing and expense reconciliation.
Common use cases
- Calculate customer invoice total including applicable GST.
- Find the pre-tax base amount from a GST-inclusive vendor invoice.
- Quickly check if a quoted price includes or excludes GST.
- Estimate quarterly GST liability for small business planning.
Examples and notes
- A service priced at ₹10,000 with 18% GST has a total of ₹11,800.
- A ₹590 GST-inclusive medical bill at 5% contains ₹28.10 GST and ₹561.90 base.
- Restaurant bills commonly carry 5% GST — use reverse calculation to verify split bills.
Important note
GST slabs and applicable categories are subject to GST Council notifications. Always verify the correct rate for your product/service category from official GST guidelines before filing.
Frequently Asked Questions
Can I remove GST from a tax-inclusive amount?
Yes. Select Remove GST mode. The tool will reverse-calculate the base amount and the GST portion from your total.
Does it show both net and tax amounts?
Yes. Results display the pre-tax base, the GST amount, and the final tax-inclusive total.
Which GST rate should I use?
Common Indian GST rates are 5%, 12%, 18%, and 28%. Verify the applicable slab for your goods or service category from official GST guidelines.
Can I use this for CGST and SGST split?
Yes. For intra-state supply, divide the GST amount equally between CGST and SGST. This tool gives the total GST; halve it for each component.