GST calculator for India

GST Calculator India

Calculate GST online in seconds. Enter an amount, choose a GST rate, and instantly see the taxable value, GST amount, final invoice value, and CGST, SGST, or IGST split.

Quick answer: To add GST, use GST = Amount × Rate ÷ 100. To remove GST from an inclusive price, use Taxable Value = Inclusive Amount ÷ (1 + Rate ÷ 100).

Add GST Remove GST CGST / SGST / IGST split Invoice-ready summary

Auto-updating calculator with cleaner results and faster checking.
Useful for billing, quotations, vendor bill checks, and price verification.
Popular GST slabs: 0%, 3%, 5%, 12%, 18%, 28%, plus custom rate.
Includes formulas, examples, quick tables, FAQs, and internal links for SEO depth.

GST Calculator

Calculator-first layout. Edit any field and results update automatically.

Live results

Amount

Enter the base amount before GST if you want to add tax.

Select GST Rate

Common slabs + custom rate

Custom GST Rate (%)

Taxable Value

₹10,000

Base amount before GST.

GST Amount

₹1,800

Tax value based on the selected rate.

Invoice Value

₹11,800

Final amount including GST.

GST Rate

18%

Selected slab or custom rate.

Detailed GST Breakdown

CGST ₹900

SGST / UTGST ₹900

IGST ₹0

Mode Add GST

Base Value vs GST Amount

Visual value split

GST Calculation Summary

What is GST in India?

A simple explanation for users who want the answer fast, not a tax lecture.

GST stands for Goods and Services Tax. In daily use, most people do not need the full policy background. They usually want to know one thing: how much tax should be added to a price, or how much tax is already included in the final billed amount.

That is exactly what this GST calculator solves. Enter an amount, select the rate, and instantly see the taxable value, GST amount, total invoice value, and the tax split for intra-state or inter-state billing.

GST calculator summary: Use this GST calculator to add GST to a base amount, remove GST from an inclusive amount, or split the GST value into CGST and SGST for intra-state billing or IGST for inter-state billing.

GST formula: how to calculate GST

The three formulas most people search for on Google.

Add GST to amount

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

Use this when the entered amount is before tax and GST must be added on top.

Remove GST from inclusive amount

Taxable Value = Inclusive Amount ÷ (1 + GST Rate ÷ 100)
GST Amount = Inclusive Amount − Taxable Value

Use this when the shown price already includes GST.

Split GST on invoice

Intra-State: CGST = GST ÷ 2, SGST = GST ÷ 2
Inter-State: IGST = Full GST Amount

Useful for bill checking, invoice preparation, and quote verification.

Common GST rate slabs in India

A practical quick-reference table for common GST calculations.

GST Rate	Typical calculator use	How users usually apply it	Intra-state split
0%	Nil-rated or exempt check	Confirm that no GST applies	No tax added
3%	Special lower-rate calculations	Used in select cases or custom billing	1.5% + 1.5%
5%	Lower-slab GST check	Useful for quick item or service pricing	2.5% + 2.5%
12%	Mid-slab GST check	Used for price comparison and invoice review	6% + 6%
18%	Most common GST calculation	Best for standard pricing and bill verification	9% + 9%
28%	Higher slab GST check	Used for higher-tax categories	14% + 14%

This table is simplified for fast calculation. Actual GST applicability depends on the product or service, HSN or SAC code, exemption status, and current notification.

Real GST calculation examples

Built for search queries like “18% GST on 10000” and “how to remove GST from 11800”.

Example 1

Add 18% GST on ₹10,000

When ₹10,000 is the base amount, GST is added on top of the entered value.

GST = ₹10,000 × 18% = ₹1,800
Total invoice value = ₹11,800
Intra-state split = CGST ₹900 + SGST ₹900

Example 2

Remove 18% GST from ₹11,800

If the amount already includes GST, derive the taxable value first.

Taxable value = ₹11,800 ÷ 1.18 = ₹10,000
GST amount = ₹1,800
Useful for bill and vendor invoice checks

Example 3

Add 5% GST on ₹2,000

A simple lower-slab example for quick pricing checks.

GST = ₹2,000 × 5% = ₹100
Total = ₹2,100
Intra-state split = CGST ₹50 + SGST ₹50

GST on common amounts

A quick reference table for the amount and slab combinations users often search for.

Amount	5% GST	12% GST	18% GST	28% GST
₹1,000	₹1,050	₹1,120	₹1,180	₹1,280
₹5,000	₹5,250	₹5,600	₹5,900	₹6,400
₹10,000	₹10,500	₹11,200	₹11,800	₹12,800
₹50,000	₹52,500	₹56,000	₹59,000	₹64,000
₹1,00,000	₹1,05,000	₹1,12,000	₹1,18,000	₹1,28,000

Why this GST calculator is more useful than a basic tool

It solves the real user job instead of just showing one formula.

Add and remove GST

Switch between exclusive-price and inclusive-price calculation in one tool.

Invoice-friendly output

See taxable value, GST amount, total invoice value, and tax split instantly.

CGST, SGST, IGST view

Useful for invoice review and billing clarity.

Better content depth

Formulas, examples, FAQs, and quick-reference tables help both users and SEO.

When GST calculations can be different

Some practical GST scenarios need extra verification.

This calculator works well for standard GST computation. But actual GST treatment can vary in special cases such as exemptions, composition scheme businesses, reverse charge scenarios, and product or service classifications.

Use this tool for pricing, estimation, quotation building, and bill checking. For compliance-sensitive use, confirm the applicable GST rate using the exact product or service classification.

GST calculator FAQs

Direct answers to common GST questions users ask on Google.

Multiply the taxable amount by the GST rate and divide by 100. For example, if the amount is ₹10,000 and GST is 18%, the GST amount is ₹1,800 and the total becomes ₹11,800.

Divide the inclusive amount by 1 plus the GST rate in decimal form. For 18% GST, divide the amount by 1.18. The difference between the inclusive amount and taxable value is the GST amount.

Add GST formula: Amount × 18 ÷ 100. Inclusive GST removal formula: Inclusive Amount ÷ 1.18 to get the taxable value.

For intra-state billing, GST is generally shown as CGST and SGST. For inter-state billing, it is generally shown as IGST.

Yes. It is useful for quotation checks, bill validation, pricing review, and invoice verification. You should still confirm the exact applicable GST rate for the product or service.

Important note before using GST results for compliance

The math is simple. The applicable rate still depends on classification and notification context.

This GST calculator is designed for fast and practical computation. It works well for daily pricing checks, quotation building, and invoice estimation. However, the correct GST rate for a product or service can depend on classification, HSN or SAC code, exemption status, place of supply, and current tax notifications.

In other words, the calculation math here is reliable for standard use, but the final applicable rate should still be verified when compliance matters.