GST Calculator

GST Calculator

Add or remove GST from a price using standard slabs or a custom rate.

  • 100% free
  • No login required
  • Mobile-first
GST Calculator
In words: One Thousand

GST estimate

GST calculation results

18%

Price (Excluding GST):Rs 1,000

GST Amount:Rs 180

Total Price:Rs 1,180

GST is calculated from the selected rate and the chosen price type.

How to use this calculator

  1. Choose whether your starting price includes GST or excludes it.
  2. Enter the price amount.
  3. Select a standard GST slab or choose a custom rate.
  4. Review the GST amount and total price instantly.

Results are estimates for planning and invoicing support. Always confirm tax treatment for the exact category of goods or services involved.

Why people use it

  • Estimate GST on a quoted or invoiced amount
  • Work backward from price including tax
  • Check total amount payable across common GST slabs
  • Download a simple GST breakdown for reference
Why GST estimation is useful in day-to-day pricing

GST affects both how businesses quote prices and how consumers understand bills. A calculator helps you quickly move between tax-exclusive and tax-inclusive prices without manual calculations.

Calculate forward or backward

Work from a base price to add GST, or start from a final amount and extract the tax portion.

Check slab-based pricing

Review how different GST rates change the invoice total on the same base value.

Support cleaner invoicing

Use the breakdown for quick reference when preparing or reviewing bills and estimates.

What is GST?

GST is an indirect tax applied on the supply of goods and services in India, usually charged as a percentage of value.

Why calculate from price including GST?

In many real-world cases, the invoice already includes tax, so the calculator helps isolate the tax component and base amount.

Why use custom rates?

Some use cases require a special or scenario-based rate assumption, and a custom field gives more flexibility for estimation.

Why use a GST calculator?

A GST calculator helps you estimate the tax amount and final invoice value from a base price or recover the embedded tax from an amount that already includes GST.

What this calculator helps you do

  • Calculate GST on a tax-exclusive price
  • Extract GST from a tax-inclusive price
  • Compare totals across common GST slabs
  • Download a simple price and tax breakdown

Who should use it

  • Small businesses preparing invoices or quotes
  • Consumers verifying billed tax amounts
  • Freelancers and service providers checking GST impact
  • Anyone trying to understand GST-inclusive pricing

What to keep in mind

GST treatment depends on the category of goods or services involved. This tool helps with estimation, but the applicable slab should always be verified for the exact transaction.

Disclaimer

This calculator is for planning and education only. For compliance and exact classification, refer to official GST rules or consult a qualified tax professional.