GST Calculator | Doc Tools Hub

GST Calculator

Calculate GST amounts for inclusive and exclusive scenarios with multiple tax slabs

Easy Calculation
Multiple Countries
All Tax Slabs
PDF Export
India has multiple GST slabs: 5%, 12%, 18%, and 28%

GST Calculation Results

Original Amount

₹0.00
Amount entered

GST Rate

0%
Tax rate applied

GST Amount

₹0.00
Tax amount

Actual Amount

₹0.00
Final amount

How to Use the GST Calculator

  • GST Exclusive: Enter the amount without GST. The calculator will add GST to get the actual amount.
  • GST Inclusive: Enter the amount that already includes GST. The calculator will separate the GST amount from the total.
  • Select a country to see its specific tax rates and structure.
  • Select a tax rate from the dropdown or use the quick selection buttons.
  • For custom tax rates, select “Custom Country” from the dropdown and enter your desired rate.
  • Click “Calculate” to see the detailed breakdown of your GST calculation.
  • Use “Download PDF Report” to save your calculation results as a PDF document.

Related Calculators

Incorrect GST calculations don’t just affect numbers—they can lead to invoice rejections, compliance issues, and loss of customer trust.

Relying on manual formulas or guesswork in today’s fast-paced business environment is risky.

This advanced GST Calculator allows you to calculate GST-inclusive and GST-exclusive amounts in seconds—from India’s multiple GST slabs to international GST/VAT rates.
No confusion. No errors. Just clear, accurate results.


What Is a GST Calculator?

A GST Calculator is an online tool that automatically calculates Goods and Services Tax (GST) based on:

  • Transaction amount
  • Applicable GST/VAT rate
  • Inclusive or exclusive pricing mode

Instead of manually applying formulas, this tool instantly provides:

  • Original amount
  • Applied GST rate
  • Exact GST amount
  • Final payable value

Why Accurate GST Calculation Matters for Businesses & Individuals

In real-world scenarios, GST calculation is more than just theory:

  • Businesses must issue GST-compliant invoices
  • Freelancers need to provide correct tax quotes
  • E-commerce sellers require transparent pricing
  • Accountants need precise reconciliation

Even a small error can result in penalties, audits, or payment disputes. That’s why a reliable online GST calculator is essential.


What Is GST and How Does It Work?

Definition of Goods and Services Tax (GST)

Goods and Services Tax (GST) is an indirect consumption tax levied on the supply of goods and services.
Its main objective is to unify multiple indirect taxes under a single system and reduce tax cascading.

Difference Between GST and VAT

While GST and VAT may appear similar, they are not identical:

  • GST often follows multiple slabs and a dual structure (e.g., CGST and SGST)
  • VAT usually has a single or limited rate

Both are consumption taxes, but implementation varies by country.

How GST Is Applied on Goods and Services

GST applies at every stage of the supply chain, but:

  • Input Tax Credit (ITC) prevents double taxation
  • The final tax burden falls on the consumer

Why GST Slabs Differ by Country

GST/VAT rates vary depending on:

  • Economic policies
  • Classification of essential vs. luxury goods
  • Government revenue needs

A multi-country GST calculator ensures accurate results for global transactions.


How to Use This Online GST Calculator

Follow these simple steps for accurate GST calculations.

Choose GST Calculation Mode

GST Exclusive Mode (Adds Tax)

Use this mode when:

  • The price excludes GST
  • You want to calculate the final amount, including tax

Common use cases: service quotations, B2B billing

GST Inclusive Mode (Extracts Tax)

Use this mode when:

  • The price already includes GST
  • You want to separate the GST portion

Common use cases: retail pricing, MRP-based invoices

Select Your Country

The calculator automatically loads tax structures for:

India, Australia, Canada, Singapore, New Zealand, South Africa, Malaysia, Germany, France, Japan, China, Italy, United Kingdom

If your country isn’t listed, you can manually enter a custom tax rate.

Enter Amount and GST Rate

  • Enter the transaction amount
  • Select a predefined GST/VAT slab or enter a custom tax rate
  • Quick slab buttons allow fast selection

Click Calculate to Get Instant GST Breakdown

The calculator instantly displays:

  • Original amount
  • Applied GST rate
  • GST amount
  • Final payable amount

No loading, no manual work.


GST Inclusive vs GST Exclusive – Key Differences

What Is GST Inclusive Pricing?

GST Inclusive Pricing means the displayed price already includes GST.

What Is GST Exclusive Pricing?

GST Exclusive Pricing means GST is added on top of the base price.

Formula Used (Same as Tool Logic)

GST Exclusive: GST=Original Amount×GST Rate100\text{GST} = \text{Original Amount} \times \frac{\text{GST Rate}}{100}GST=Original Amount×100GST Rate​ Final Amount=Original Amount+GST\text{Final Amount} = \text{Original Amount} + \text{GST}Final Amount=Original Amount+GST

GST Inclusive: Original Amount=Final Amount1+(GST Rate/100)\text{Original Amount} = \frac{\text{Final Amount}}{1 + (\text{GST Rate}/100)}Original Amount=1+(GST Rate/100)Final Amount​ GST=Final Amount−Original Amount\text{GST} = \text{Final Amount} – \text{Original Amount}GST=Final Amount−Original Amount


Country-Wise GST & VAT Rates Supported

GST Rates in India

  • 5% – daily essentials
  • 12% – standard goods
  • 18% – most services
  • 28% – luxury items

GST/VAT Rates in Other Countries

  • Australia: 10%
  • Canada: 5%
  • Singapore: 9%
  • New Zealand: 15%
  • South Africa: 15%
  • Malaysia: 6%
  • Germany: 19%, 7%
  • France: 20%, 10%, 5.5%, 2.1%
  • Japan: 10%, 8%
  • China: 13%, 9%, 6%, 3%
  • Italy: 22%, 10%, 5%, 4%
  • United Kingdom: 20%

GST Calculator Example (Step-by-Step)

Exclusive Example

  • Amount: ₹1,000
  • GST: 18%
  • GST Amount: ₹180
  • Final: ₹1,180

Inclusive Example

  • Amount: ₹1,180
  • GST: 18%
  • Original: ₹1,000
  • GST Amount: ₹180

The same logic is applied to PDF reports and on-screen results.


Advanced Features of This GST Calculator

  • Multi-Country GST & VAT Support: Country-specific rates and currency formatting
  • Custom Tax Rate Calculator: Ideal for international clients and non-standard regions
  • Instant PDF GST Report Download: Professional layout with formulas included
  • Copy GST Results with One Click: Ready for invoices, emails, or accounting
  • Mobile-Friendly & Responsive Design: Works smoothly on desktop, tablet, and mobile

Why Use Our GST Calculator Instead of Manual Calculation?

  • Eliminates calculation errors
  • Saves time
  • Supports multiple countries
  • No login required
  • Free and accurate
  • Decimal-level precision

Who Should Use This GST Calculator?

Business owners, accountants, freelancers, e-commerce sellers, import/export traders, students, and anyone dealing with GST.

Final Thoughts – Simplify GST Calculations Online

GST may seem complex, but with the right calculator, it becomes simple and error-free.

This GST Calculator combines speed, accuracy, and transparency—whether you operate in India or globally.

👉 Use the calculator, avoid errors, and calculate GST confidently.

FAQs About GST Calculator

GST on ₹1,00,000 depends on the applicable GST rate.

  • 5% GST: ₹5,000 → Total = ₹1,05,000

  • 12% GST: ₹12,000 → Total = ₹1,12,000

  • 18% GST: ₹18,000 → Total = ₹1,18,000

  • 28% GST: ₹28,000 → Total = ₹1,28,000

Use a GST calculator to avoid manual errors, especially for inclusive pricing.

You can calculate GST using two methods:

GST Exclusive Formula:
GST = Amount × (GST Rate ÷ 100)
Final Amount = Amount + GST

GST Inclusive Formula:
Original Amount = Total ÷ (1 + GST Rate)
GST = Total − Original Amount

Online GST calculators automate this process instantly and accurately.

GST on ₹50,000 varies by rate:

  • 5% GST: ₹2,500 → Total = ₹52,500

  • 12% GST: ₹6,000 → Total = ₹56,000

  • 18% GST: ₹9,000 → Total = ₹59,000

  • 28% GST: ₹14,000 → Total = ₹64,000

For inclusive prices, the GST portion is extracted using reverse calculation.

To calculate GST from a GST-inclusive total, use this formula:

Original Amount = Total ÷ (1 + GST Rate)
GST = Total − Original Amount

Example:

  • Total Amount: ₹1,180

  • GST Rate: 18%

  • Original Amount: ₹1,180 ÷ 1.18 = ₹1,000

  • GST: ₹180

A GST calculator performs this instantly without manual effort.

Australia applies a 10% GST on most goods and services.

Example:

  • Amount: AUD 1,000

  • GST (10%): AUD 100

  • Final Amount: AUD 1,100

A GST calculator for Australia automatically applies the 10% rate and supports both inclusive and exclusive pricing.

GST Exclusive Formula:
GST = Amount × GST Rate ÷ 100

GST Inclusive Formula:
Original = Total ÷ (1 + GST Rate)

These are the same formulas used by professional GST calculators.

Yes, GST can be calculated on MRP (Maximum Retail Price) if the price is GST inclusive. In such cases, GST is extracted from the total using the inclusive formula.

Yes. Advanced GST calculators support multiple countries including India, Australia, UK, Canada, and EU nations, along with custom tax rates.

The calculation method is the same, but the GST rate differs. Services in India usually attract 18% GST, while goods may fall under 5%, 12%, 18%, or 28%.