🧾 GST / Tax Calculator

About this GST / Tax Calculator

This GST and sales tax calculator works in both directions. Add mode takes a base price and shows the tax and the final total. Remove mode takes a tax-inclusive price and splits it into the base amount and the tax portion, which is exactly what businesses need for invoices, billing and tax filing.

How to use it

1. Enter the amount.
2. Pick a standard rate, or choose Custom and type your own rate.
3. Choose Add tax or Remove tax and click Calculate.

Example

Add 18% GST to Rs 10,000: the tax is Rs 1,800 and the total is Rs 11,800. In Remove mode, an inclusive price of Rs 11,800 splits into a base of Rs 10,000 plus Rs 1,800 tax.

Frequently asked questions

How do I extract tax from an inclusive price?

Divide the inclusive price by (1 + rate/100) to get the base; the remainder is the tax. This tool does that in Remove mode.

Which rates are standard?

GST slabs of 0%, 5%, 12%, 18% and 28% are built in. Other taxes, like a local sales tax, can be entered with the Custom option.

Can I use this for VAT or sales tax?

Yes. The maths is identical: a percentage added to, or removed from, a price.

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