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GST Calculator

Add or extract GST with CGST/SGST or IGST breakdown.

  1. 01 · Set inputs
  2. 02 · Calculate
  3. 03 · Review
  4. 04 · Export CSV
Work in your browser

How to use GST Calculator

Enter amount and your applicable GST rate. Choose tax-inclusive/exclusive and CGST plus SGST/UTGST or IGST, then review and export CSV.

Example

An exclusive 1,000 amount at a user-entered 18% gives 180 tax and 1,180 total; the intra-state split is 90 plus 90.

Limits and output

Rates are user inputs, not current product classifications. Verify place of supply and applicable rules. Excludes exemptions, cess, reverse charge and registration validation. Half-up currency rounding; split shares reconcile to total tax.

Good to know

RedTools is an early version of an everyday utility workspace. Image, text, calculation, and developer inputs are processed in your browser.

Your favorites, recently used tool IDs, and theme choice are stored on this device. Tool inputs are not automatically saved. Invoice drafts are saved on this device only when you choose Save draft locally. Hosting can receive ordinary page requests; this app includes no analytics.

Images to PDF, merge and split work locally. PDF compression is upcoming.

Icons: Solar by 480 Design · CC BY 4.0. Components: Be UI and shadcn/ui.