GST Calculator India
Calculate GST instantly with CGST and SGST split for intra-state transactions, or IGST for inter-state transactions. Enter any price, select the GST slab (5%, 12%, 18%, or 28%), and choose whether to add GST to a base price or extract it from a GST-inclusive amount. Includes a full comparison table across all GST slabs — free, private, and no signup required.
Enter a price, select the GST rate slab, choose intra-state (CGST + SGST) or inter-state (IGST), and select whether to add GST to the price or extract it from a GST-inclusive amount. All calculations run instantly in your browser — no data is sent to any server.
Enter the price in rupees
Intra = same state; Inter = different state
GST = Base × Rate ÷ 100
Total = Base + GST
Base = Total ÷ (1 + Rate ÷ 100)
GST = Total − Base
CGST + SGST: For intra-state transactions, GST is split equally — each half goes to Central and State government. IGST: For inter-state transactions, the full GST goes to the Central government as Integrated GST.
Why Use Our GST Calculator?
Instant GST Calculation with CGST/SGST Split
Enter any price, select a GST slab, and get the CGST, SGST, and IGST breakdown instantly. The GST calculator processes everything in your browser with zero wait time — no page reload, no server call.
Secure GST Calculator Online
The GST calculator runs entirely in your browser. Your prices and financial data are never sent to any server, stored in a database, or tracked in any way — 100% private on your device.
GST Calculator Online — No Installation
Use the GST calculator directly in any modern browser with no downloads, apps, or plugins required. Supports all four India GST slabs (5%, 12%, 18%, 28%) plus custom rates for any scenario.
100% Free with All-Slab Comparison
The GST calculator is completely free with no signup, no usage limits, and no ads. Get CGST/SGST/IGST breakdown, add/remove GST modes, and a full comparison table across all GST slabs — free forever.
Common Use Cases for GST Calculator
Business Invoice Preparation
Use the GST calculator to compute the exact CGST and SGST amounts for intra-state invoices, or IGST for inter-state invoices. Enter the taxable value and GST slab to get the correct tax amounts for your invoice in seconds.
Retail Price Calculation
Retailers use the GST calculator to determine the final MRP from a base price, or to find the base price from a GST-inclusive MRP. Select the correct GST slab for your product category and get the breakdown instantly.
GST Return Filing Preparation
Use the GST calculator to verify tax amounts before filing GSTR-1, GSTR-3B, or other returns. Cross-check your CGST, SGST, and IGST figures against the calculator to catch errors before submission.
Purchase Order Verification
Buyers use the GST calculator to verify that the GST charged on a supplier invoice is correct. Enter the taxable value and GST rate to confirm the CGST/SGST split matches what the supplier has billed.
E-commerce Pricing Strategy
Online sellers use the GST calculator to set competitive prices that include the correct GST component. Model different price points across GST slabs to find the optimal pricing for your product listings.
Freelancer & Consultant Billing
Service providers registered under GST use the GST calculator to add 18% GST to their professional fees. Enter your service fee to instantly get the GST amount and total invoice value for client billing.
Understanding the GST Calculator
What is a GST Calculator?
A GST calculator is a financial tool that computes the Goods and Services Taxamount for any price, based on the applicable GST slab rate. India's GST system has four main tax slabs: 5% (essential goods), 12% (processed goods), 18% (most services and standard goods), and 28% (luxury and sin goods). The GST calculator supports both adding GST to a base price (tax-exclusive) and extracting GST from a GST-inclusive price (tax-inclusive). It also splits the GST into CGST (Central GST) and SGST (State GST) for intra-state transactions, or shows IGST (Integrated GST) for inter-state transactions.
How Our GST Calculator Works
- Enter the Price and Select the GST Slab: Input the amount in rupees and choose the applicable GST rate — 5%, 12%, 18%, 28%, or a custom rate. Select whether the transaction is intra-state (CGST + SGST) or inter-state (IGST).
- Instant Browser-Based Calculation:Click “Calculate GST” and the GST calculator applies the correct formula entirely in your browser. No data is sent to any server — your prices and financial details stay completely private on your device.
- Review the Full GST Breakdown: The GST calculator displays the base price, CGST/SGST or IGST amounts, total GST, and final invoice value. A comparison table shows the GST and total for all four standard slabs simultaneously.
What the GST Calculator Shows
- CGST and SGST (Intra-state): For transactions within the same state, the total GST is split equally between Central GST and State GST. For example, at 18% GST, CGST = 9% and SGST = 9%.
- IGST (Inter-state): For transactions between different states or union territories, the full GST rate applies as Integrated GST, collected entirely by the Central government.
- Add GST Mode: Enter the pre-tax (taxable) value. The GST calculator computes GST = Base × Rate ÷ 100, and Total = Base + GST.
- Remove GST Mode: Enter the GST-inclusive price. The GST calculator extracts the base using Base = Total ÷ (1 + Rate ÷ 100), and GST = Total − Base.
India GST Slab Structure
India's GST council has defined the following standard rate slabs. The 0% slab covers essential items like fresh produce, milk, and unprocessed food grains. The 5% slab covers packaged food, transport services, and essential goods. The 12% slab covers processed food, computers, and business-class air travel. The 18% slab is the most common rate, covering most services, electronics, and standard goods. The 28% slabapplies to luxury goods, automobiles, tobacco, and aerated drinks. Some items like gold and jewellery have special rates of 3%, and rough precious stones are taxed at 0.25%. Use the GST calculator's custom rate option for these special categories.
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Frequently Asked Questions About GST Calculator
A GST calculator is a financial tool that computes the Goods and Services Tax amount for any price based on the applicable GST slab rate. Our GST calculator supports all four India GST slabs (5%, 12%, 18%, 28%), CGST/SGST split for intra-state transactions, IGST for inter-state transactions, and both add-GST and remove-GST modes — all running locally in your browser with no signup required.
CGST (Central GST) and SGST (State GST) apply to intra-state transactions — transactions within the same state. The total GST is split equally between the Central and State governments. IGST (Integrated GST) applies to inter-state transactions — transactions between different states or union territories — and the full GST amount goes to the Central government. The GST calculator automatically shows the correct split based on your selection.
Enter the base price (taxable value), select the GST slab (e.g. 18%), choose "Add GST to price", and click Calculate GST. The formula is: GST = Base × Rate ÷ 100, and Total = Base + GST. For example, ₹1,000 at 18% GST gives CGST ₹90 + SGST ₹90 = Total GST ₹180, and a final invoice value of ₹1,180.
Enter the GST-inclusive price (MRP or invoice total), select the GST slab, choose "Remove GST from price", and click Calculate GST. The formula is: Base = Total ÷ (1 + Rate ÷ 100). For example, ₹1,180 at 18% GST gives a base price of ₹1,000 and GST of ₹180.
India's GST has four main slabs: 5% for essential goods like packaged food and transport; 12% for processed food, computers, and business travel; 18% for most services, electronics, and standard goods; and 28% for luxury goods, automobiles, tobacco, and aerated drinks. Special rates of 0.25%, 1.5%, and 3% apply to precious stones and jewellery. The GST calculator supports all these rates including a custom rate option.
Absolutely. The GST calculator runs entirely in your browser. Your prices and financial data are never sent to any server, stored in a database, or tracked in any way. Everything stays completely private on your device.
Yes — the GST calculator is 100% free with no signup, no account, and no usage limits. Calculate GST for any price, any slab, and any transaction type as many times as you need, completely free forever.
The comparison table shows the CGST/SGST (or IGST), total GST, and final invoice value for your entered amount across all four standard GST slabs (0%, 5%, 12%, 18%, 28%) simultaneously. The currently selected slab is highlighted, making it easy to compare the tax burden across different slabs.
Yes. Most services in India attract 18% GST. Enter your service fee, select 18%, choose intra-state or inter-state, and the GST calculator shows the CGST/SGST split and total invoice value. For professional services like consulting, legal, or IT services, this is the standard rate to use.