How do I add GST to a price?

Enter the base price, select the GST rate, choose Add GST mode and click Calculate. Formula: GST Amount = Base Price × GST Rate ÷ 100. Total = Base Price + GST Amount.

How do I remove GST from an inclusive amount?

Enter the GST-inclusive price, select the GST rate, choose Remove GST mode and click Calculate. Formula: Taxable Value = Inclusive Price × 100 ÷ (100 + GST Rate). GST Amount = Inclusive Price − Taxable Value.

How is CGST and SGST calculated?

For intra-state supply, GST is split equally between CGST and SGST. CGST = GST Amount ÷ 2. SGST = GST Amount ÷ 2. For example, on 18% GST: CGST = 9% and SGST = 9%.

Can I use this GST calculation in an invoice?

Yes. Click Use in GST Invoice to save the calculation and open the SalesOn GST Invoice Generator with the amounts pre-filled. You can also create a complete GST invoice directly from the tool.

✓ Free · No Signup Required 📊 CGST / SGST / IGST ⇄ Inclusive + Exclusive 🧾 Invoice Ready

Free GST Calculator
for Indian Businesses

Q: How is IGST calculated?

For inter-state supply, the full GST is charged as IGST. IGST = Taxable Value × GST Rate ÷ 100. There is no CGST or SGST split for inter-state transactions.

Calculate GST exclusive price, GST inclusive price, CGST, SGST, IGST, taxable value and invoice total instantly. Built for Indian distributors, wholesalers, manufacturers and MSMEs.

SalesOn Platform

GST calculation is simple. Daily GST billing is where businesses struggle.

A GST calculator helps you find tax amounts quickly. But when your business handles daily invoices, orders, stock, payments, field sales and Tally entries — you need a connected system. SalesOn connects everything.

✓ GST billing — CGST, SGST, IGST
✓ Order taking from field teams
✓ Stock tracking across godowns
✓ Payment collection follow-ups
✓ Field sales app for salesmen
✓ Tally / Busy integration

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🧾 GST Billing

Create CGST/SGST/IGST invoices in seconds. Auto tax calculation on every line item.

📦 Stock Tracking

Live inventory across godowns. Stock reduces automatically when invoice is created.

🔗 Tally / Busy Sync

Push invoices directly to Tally or Busy. No double entry. No reconciliation headache.

📱 Field Sales App

Salesmen take orders, collect payments and send invoices from their phone.

How to use this GST Calculator

Step 1 — Select Mode

Choose Add GST to calculate total from base price, Remove GST to extract tax from inclusive price, or Invoice Total for multi-item bills.

Step 2 — Enter Amount

Enter the base amount. Use the quick rate buttons to set GST rate (5%, 12%, 18%, 28%) or select from the dropdown.

Step 3 — Choose GST Type

Select Intra-State for same-state supply (CGST + SGST split) or Inter-State for IGST.

Step 4 — Add Optional Fields

Add quantity, discount or shipping charges if needed. Toggle round-off as required.

Step 5 — See Result

Results show instantly — taxable value, CGST, SGST, IGST, grand total and amount in words.

Step 6 — Copy or Use in Invoice

Copy the calculation or click Use in GST Invoice to carry these values into the SalesOn GST Invoice Generator.

How to add GST to an amount

To find the final price after adding GST to a base amount:

Formula — Add GST

GST Amount = Base Amount × GST Rate ÷ 100
Grand Total = Base Amount + GST Amount

Example: ₹10,000 × 18% = ₹1,800 GST → Total = ₹11,800

How to remove GST from a GST-inclusive price

To find the taxable value when you only have the inclusive price (Reverse GST):

Formula — Remove GST (Reverse Calculation)

Taxable Value = Inclusive Price × 100 ÷ (100 + GST Rate)
GST Amount = Inclusive Price − Taxable Value

Example: ₹11,800 inclusive at 18% → Taxable = ₹10,000 → GST = ₹1,800

CGST, SGST & IGST — what is the difference?

Tax	Full Form	When Applied	Rate
CGST	Central GST	Intra-state supply	Half of GST rate
SGST	State GST	Intra-state supply	Half of GST rate
IGST	Integrated GST	Inter-state supply	Full GST rate

Example at 18% GST: Intra-state → CGST 9% + SGST 9%. Inter-state → IGST 18%.

Free Business Tools

Related SalesOn Free Tools

🛠️ All Free Tools 🧾 GST Invoice Generator 📋 Quotation Generator 💰 Payment Receipt 🚚 Delivery Challan 📦 Purchase Order 💬 WhatsApp Reminder 🔍 HSN/SAC Finder 🧮 GST Calculator

GST Invoicing Software → Tally Integration → Book Demo →

FAQs

Frequently Asked Questions

Yes. This GST calculator is completely free. No account or subscription required. You can calculate GST unlimited times at no cost.

Select Add GST mode, enter the base price and select the GST rate. The calculator shows GST amount and grand total instantly. Formula: GST = Base × Rate ÷ 100. Total = Base + GST.

Select Remove GST mode, enter the GST-inclusive amount and select the GST rate. The tool calculates taxable value and GST amount. Formula: Taxable = Inclusive × 100 ÷ (100 + Rate).

For intra-state supply, GST is split equally. CGST = SGST = GST Amount ÷ 2. At 18% GST: CGST = 9%, SGST = 9%. Select Intra-State in the GST type option.

For inter-state supply, the full GST rate is charged as IGST. IGST = Taxable Value × GST Rate ÷ 100. There is no CGST or SGST split. Select Inter-State in the GST type option.

Yes. Click Use in GST Invoice to save the calculation and open the SalesOn GST Invoice Generator with the calculated values ready to use. You can also click Use in Quotation for quotation documents.

Free GST Calculatorfor Indian Businesses