Calculator · Guide 3 of 7
GST Calculator with Instant CGST/SGST Split
Toggle exclusive or inclusive pricing and get base, GST, total, and half-split CGST/SGST instantly.
Base
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GST
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Total
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CGST
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SGST
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Enter an amount and GST rate. This tool is for quick math — not tax advice.
Intra-state shown as CGST/SGST halves. Interstate IGST would be the full tax amount.
Quick answer
Choose exclusive to add GST on a base amount, or inclusive to extract base and tax from a price that already includes GST. The tool shows base, GST, total, and an automatic CGST/SGST split in rupees. It does not decide your legal rate or filing — that is for a professional.
How to use the GST calculator
- Pick a preset close to your business — kirana goods at 5%, an inclusive retail price at 18%, or a service invoice at 18% — or start blank.
- Enter the amount you are quoting, billing, or paying (Rs).
- Choose the GST rate from the dropdown (0, 5, 12, 18, or 28%) that applies to your product or service.
- Select exclusive or inclusive to match how you already price — exclusive adds tax on top, inclusive extracts it from a final price.
- Read base, GST, total, and CGST/SGST instantly, then copy the numbers onto your invoice or WhatsApp quote.
Once totals are locked, take them straight into the Invoice Template so buyers see the same number everywhere.
Exclusive vs inclusive — pick one story
Confusion starts when your catalogue says one thing and your invoice says another.
- •Exclusive. Buyer sees base, then tax added. Good when B2B clients expect a tax line.
- •Inclusive. Buyer sees one final number. Common for retail WhatsApp shops — still keep an internal base for books.
- •Never mix silently. Label prices on your store and in chat.
After you know the total, check whether the deal still leaves healthy profit with the profit margin calculator.
Put the numbers on invoices and payment asks
Clean GST math fails if the UPI note shows a different total than the PDF.
Copy base, tax, and total into the Invoice Template, then match collection habits from payment management. Festival offers still need a clear tax story — pair discounts with the discount calculator.
Next step: draft the invoice, tick payment fields on the Customer Support Checklist, then Open Invoice Template.
Important: this page is not tax advice
Futkar provides a free calculator so sellers stop doing GST arithmetic on scrap paper. We do not advise on registration, exemptions, input credit, place of supply, or returns.
If a customer asks for a GST invoice and you are unsure whether you can issue one, pause and talk to a CA. Wrong promises create bigger problems than a delayed reply.
Keep operations calm while you learn the rules — stock and order habits in order management still matter either way.
Use cases — who should run this GST calculator
Use it whenever a rupee amount needs a clear tax story before it reaches a buyer, a supplier, or an invoice.
Kirana / grocery retail
Daily-use goods at 5%
Enter the basket value with the 5% preset to see how much tax sits inside common daily-use items. Unlocks a clean answer for "why does the bill show extra" without opening a rate card.
Preset: 5% goods (kirana).
Electronics retail
Ahmedabad accessories
Marked store prices inclusive. Enter the sticker price in inclusive mode before quoting UPI so chat totals matched invoices exactly, with CGST/SGST ready for the bill.
Preset: 18% goods, inclusive.
Wholesale spices
Kochi B2B packs
Clients wanted exclusive pricing with a visible tax line. Enter the base rate in exclusive mode; the CGST/SGST split drops straight into the invoice template, cutting revision rounds.
Preset: 18% service invoice (adapt rate as needed).
Salon & spa packages
Bengaluru memberships
Enter the inclusive package price to back out tax and see true service revenue before planning staff pay and commissions.
Preset: 18% goods, inclusive.
Freelance / consulting services
Pune design retainer
Enter the agreed fee in exclusive mode at 18% to get the tax line for a professional invoice. Decides whether to quote clients "plus GST" or a flat number.
Preset: 18% service invoice.
Apparel boutique
Surat catalogue pricing
Decide once whether the catalogue is inclusive or exclusive, then use the same mode every time so festive-week helpers do not quote two different totals for the same kurti.
Switch modes to compare buyer-facing totals.
GST math mistakes that hurt trust
Guessing the rate
Wrong rate on an invoice is not a small typo — confirm with a CA.
Charging GST when unregistered
Collectors without registration create legal risk.
Inclusive catalogue, exclusive UPI
Buyers feel tricked when the total jumps in chat.
Rounding chaos
Pick a rounding habit and stick to it on every line.
Next step: clear invoices, clear UPI totals
Work out GST lines here, then put the same numbers on Futkar prices and invoices.
Open Invoice TemplateRelated tools while you handle GST lines
Invoice Template
Base, tax, and total buyers can verify.
Open template → GuidePayment Management
UPI, COD, and day-end reconcile habits.
Open guide → CalculatorProfit Margin Calculator
Check profit after you settle tax math.
Open calculator → CalculatorDiscount Calculator
Offer math that still leaves room for tax.
Open calculator → ChecklistCustomer Support Checklist
Clear replies when buyers ask about tax.
Open checklist →FAQs
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