GST Calculator India — Exclusive & Inclusive GST Calculation Made Simple

Use our GST Calculator India to calculate Instant GST for India — inclusive and exclusive price, CGST–SGST split, IGST, cess and quantity totals. Use this GST Calculator to get accurate tax values for invoices, e-commerce billing, business purchases and compliance checks.
Want more tools, please explore our tools directory overview and free tools page categories.

GST Calculator — India (Exclusive / Inclusive)

Quick GST math with clear CGST/SGST split or IGST view. Supports reverse calculation, cess, quantity and copy-to-clipboard.

Enter cess % if applicable (e.g. on specific goods)
Useful for invoice totals

Estimator only. For complex supplies, reverse charge, or legal GST advice consult your CA or GST practitioner.

Next step: Simplify GST billing and compliance

If you generate GST invoices regularly or manage GST for a business,
manual billing and record-keeping often lead to calculation errors, compliance gaps, missed input credits, and reconciliation issues.

Many small businesses reduce these problems by using invoice and accounting software like Vyapar to manage billing, inventory, and GST records automatically (free trial available).

Try Vyapar – Free Trial

Disclosure: This page may contain an affiliate link. If you sign up, we may earn a commission at no extra cost to you.

What this GST Calculator does

This tool helps you instantly compute GST for any item or service. Whether you enter the price before GST (exclusive) or price including GST (inclusive), it automatically breaks down:

  • Base price
  • GST rate
  • CGST & SGST (intra-state) or IGST (inter-state)
  • Cess (if applicable)
  • Total GST
  • Final invoice amount

It’s perfect for traders, shop owners, freelancers, accountants, e-commerce sellers and buyers who want quick GST clarity.

Understanding GST in India — A simple explanation

Goods and Services Tax (GST) is India’s unified indirect tax system that replaced VAT, service tax, excise duty and multiple state levies. GST simplifies taxation by applying one tax across the country with three main components:

1. CGST — Central GST

Collected by the Central Government on intra-state supplies.

2. SGST — State GST

Collected by State Governments on intra-state supplies.

3. IGST — Integrated GST

Applied on inter-state supplies and imports.

When a buyer and seller are in the same state, GST is split into CGST + SGST.
When they are in different states, GST is charged as IGST.

GST Slabs in India

Common GST slab rates are:

  • 0% – essentials
  • 5% – food items, medicines
  • 12% – processed foods, utensils, services
  • 18% – electronics, services, general goods
  • 28% – luxury items
  • Cess – tobacco, aerated drinks, luxury cars

Correct calculation matters because GST affects pricing, claiming ITC, invoicing, and tax filing.

Note: At the 56th meeting of the GST Council (3 September 2025), major rationalisation of GST slabs was approved — effective from 22 September 2025 almost all goods and services shifted to just two core GST rates: 5% (merit rate) and 18% (standard rate), replacing the earlier four-slab system of 5%, 12%, 18% and 28%. So, as per the September 2025 reforms, most goods have moved out of the 28% slab into 18% or below. A few specific goods (notably tobacco/cess-linked items) may still continue under 28% or compensation cess-linked rates until notified. Refer FAQ on GST Official website.

How to use Toolsuite’s GST Calculator

Step 1 — Choose mode

Select whether your entered amount includes GST or excludes GST.

  • Exclusive (before tax): GST will be added
  • Inclusive (after tax): GST will be back-calculated

Step 2 — Enter price

Input the item/service value. The tool accepts decimal values for accuracy.

Step 3 — Select GST rate

Choose from common slabs (0%, 5%, 12%, 18%, 28%) or enter a custom rate.

Step 4 — Add cess (optional)

If applicable, enter cess percentage (for specific goods).

Step 5 — Choose transaction type

  • Intra-state for CGST + SGST split
  • Inter-state for IGST

Step 6 — Enter quantity

Useful for wholesale or multi-unit invoices.

Step 7 — Click “Calculate”

You’ll instantly see:

  • Base price
  • CGST, SGST or IGST
  • Cess
  • Total tax
  • Final bill amount
  • GST breakup per unit & total

Step 8 — Copy or print

Use the Copy button to save the entire tax summary.

Why this GST tool is useful

  • Helps businesses generate accurate GST-compliant invoices
  • Helps buyers verify if sellers charged correct GST
  • Helps freelancers check GST on services
  • Supports e-commerce sellers for quick price verification
  • Works instantly without login or signup
  • Mobile friendly and fast

This calculator saves time, avoids manual mistakes and brings clarity to tax-inclusive vs tax-exclusive pricing.

clean digital workspace, glowing interface of GST calculator India
Smart GST calculation for invoices, billing & business decisions.

Frequently Asked Questions (FAQ)

Q1. Does the calculator work for both intra-state and inter-state GST?
Yes. Choose the transaction type:

  • Intra-state → CGST + SGST
  • Inter-state → IGST

Q2. Can I calculate GST for prices that already include tax?
Yes. Select “Inclusive of GST” mode to reverse-calculate GST and base price.

Q3. Does this GST Calculator support cess?
Yes, you can enter any cess percentage. It will calculate cess per unit and total.

Q4. Can this be used for GST invoicing?
It helps compute GST amounts accurately, but you must issue invoices in your accounting or GST billing software.

Q5. Does it support custom GST slabs?
Yes. Select “Custom rate” and enter any tax percentage you need.

Q6. Is this tool accurate for all states?
Yes. GST is a uniform national tax, so this calculator works across all Indian states and UTs.

Related Tools and Directory