GST Calculator
Calculate GST-inclusive and exclusive pricing, compare slabs, build invoice items, and switch between CGST/SGST and IGST views
How it works
Calculate GST
Choose a GST mode, enter amounts, then review tax and final totals
- Choose modeUse base, inclusive, invoice, or slab mode.
- Enter valuesAdd amount, rate, or item details.
- Review taxCheck GST split, totals, and export options.
Calculate
Choose a GST mode
Start with a price, invoice, or slab comparison and adjust the relevant values
Results update automatically as you change values.
Result
Review, copy, download, or share this result.GST calculation
$1,500.00 before GST.
18% GST gives a final amount of $1,770.00.
Base amount$1,500.00Amount before GST
GST amount$270.0018% GST
Total amount$1,770.00Amount after GST
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Tool guide
Why use a GST calculator?
A GST calculator helps you check invoice totals, reverse-calculate tax-inclusive prices, and compare slab impacts without manual math.
Tax splitInvoice checksShare-ready
FAQs
Can I calculate GST from a total price?
Yes. Use the price-including-GST mode to split the total into base amount and tax amount.
Can I compare slabs quickly?
Yes. Slab comparison mode shows the output for the common GST rates side by side.
Is this useful for invoices?
Yes. Invoice mode supports multiple line items and split views for CGST/SGST or IGST.
Should I verify GST before filing or billing?
Yes. Use this as a quick calculator only and confirm official rates, classifications, exemptions, and filing requirements with a tax professional or official source.
Can I copy or download the result?
Yes. Copy the GST summary, download its result card, or copy a share link.
Does this tool store my data?
No. Your amounts, rates, and GST results are not saved by the tool.