GST (Goods and Services Tax) is an indirect tax applied to the supply of goods and services. It replaced multiple indirect taxes in India and is designed to create a unified tax system across the country.

What is the formula to Remove GST?

Formula: Net Price = Cost / (1 + (GST% / 100)); GST Amount = Cost - Net Price.

How does a GST calculator work?

A GST calculator automatically calculates the GST amount and final price based on the original value and selected GST rate. It can also reverse-calculate the pre-tax amount when GST is already included in the price.

What are the common GST rates in India?

Common GST slabs in India include 5%, 12%, 18%, and 28%. Certain essential goods may be exempt or taxed at lower rates, while luxury and special products may attract higher tax rates.

What is the difference between CGST, SGST, and IGST?

CGST (Central GST) and SGST (State GST) are applied to intra-state transactions and are typically split equally. IGST (Integrated GST) is charged on inter-state transactions and is collected by the central government.

Can I calculate GST-inclusive and GST-exclusive prices?

Yes. A GST calculator can add GST to a base price to determine the final amount or remove GST from a GST-inclusive price to find the original value and tax component.

How do I calculate 18% GST on an amount?

To calculate 18% GST, multiply the original amount by 18 and divide by 100. Add the resulting GST amount to the original value to obtain the total price including GST.

Why is a GST calculator useful?

A GST calculator helps businesses, freelancers, shop owners, accountants, and consumers quickly calculate tax amounts, verify invoices, prepare quotations, and avoid manual calculation errors.

Can businesses claim GST input tax credit?

Eligible registered businesses may claim Input Tax Credit (ITC) on GST paid for business-related purchases, subject to compliance with applicable GST regulations and documentation requirements.

Are GST calculator results accurate?

Yes. GST calculators use standard tax formulas and provide accurate results based on the values and tax rates entered. Accuracy depends on selecting the correct GST rate for the transaction.

Can I embed this tool on my website?

Yes, this tool can be embedded using our free iframe embed code.

GST Calculator - Add or Remove GST Online

Configure Invoice Value

Currency

Base/Net Amount (excluding tax)

Min: $10 Max: $50,000

GST / Sales Tax Rate

Min: 1% Max: 40%

Split CGST & SGST (50:50)

Show splits for local state sales taxes

Invoice Summary

Your real-time tax breakdown report:

Total Gross Amount $1,180.00

Net Cost (Before Tax) $1,000.00

Total GST Tax $180.00

CGST (Central Share) $90.00

SGST (State/Local Share) $90.00

Base Capital (Net) GST Tax (18%)

Copy Clean Tax Report Summary

Quickly paste summaries into emails, invoices, or messenger drafts.

Business Tax Guide

GST Calculator – Goods & Services Tax Guide

Goods and Services Tax (GST) is a destination-based indirect tax in India. Our GST calculator computes exact CGST, SGST, IGST, and net base prices for inclusive and exclusive invoices.

What is a GST Calculator?

A financial utility that computes total tax liabilities or reverse-calculates base prices from inclusive amounts across standard Indian GST slabs (5%, 12%, 18%, 28%).

Key Benefits of Using a GST Calculator

Inclusive & Exclusive Modes: Add tax or extract pre-tax base prices.
CGST / SGST Split: Splits intra-state tax 50-50 automatically.
Error-Free Invoicing: Ensures accurate billing and tax filings.

How GST is Calculated (Live Example)

Calculated for ₹10,000 Net Base Price at 18% GST Slab:

Base Price ₹10,000

GST Rate 18% Slab

Tax Split CGST 9% + SGST 9%

Gross Total ₹11,800

• Exclusive Mode (Add Tax): ₹10,000 × 18% = ₹1,800 Tax → Total = ₹11,800

• Inclusive Mode (Extract Base): ₹11,800 / 1.18 = Base ₹10,000 (GST = ₹1,800)

• Intra-State Breakdown: CGST (9%) = ₹900 | SGST (9%) = ₹900

Net Base: ₹10,000 GST Tax (18%): ₹1,800 Gross Total: ₹11,800

Enter Amount

Input item price and select Inclusive or Exclusive.

Select Rate Slab

Choose 5%, 12%, 18%, 28% or a custom tax percentage.

View Tax Split

Get CGST/SGST/IGST breakdown and gross invoice total.

Calculations are digital mathematical approximations. Tax rules change across territories; verify calculations against official state compliance instructions prior to final custom filings.