Add tax to a price, or find the tax included in a price.
To add tax: price × (1 + rate). ₹10,000 plus 18% GST is ₹11,800.00. To remove it: divide by (1 + rate) — ₹11,800 including 18% GST is ₹10,000 plus ₹1,800 tax.
Use this calculator to add sales tax or GST to a price, or to work backwards from a tax-inclusive price to find the price before tax and the tax amount. It also shows the tax split into two equal halves, as with CGST and SGST in India.
Tax rates differ by item, state and country, so enter the rate that applies to you — check the official GST rate schedule or your state's sales tax rate. For VAT-based systems use the VAT Calculator; to apply a discount first use the Discount Calculator.
The calculator applies the standard financial formulas step by step.
| Item | Value |
|---|---|
| Amount before tax | ₹10,000.00 |
| Tax amount | ₹1,800.00 |
| Total including tax | ₹11,800.00 |
| If the tax is split in two (e.g. CGST + SGST) | ₹900.00 each |
| Case | Result |
|---|---|
| ₹10,000 plus 5% | ₹10,500.00 |
| ₹10,000 plus 12% | ₹11,200.00 |
| ₹10,000 plus 18% | ₹11,800.00 |
| ₹10,000 plus 28% | ₹12,800.00 |
| ₹11,800 including 18% → net | ₹10,000.00 |
Multiply the price by (1 + GST rate ÷ 100). For 18%: price × 1.18.
Divide by 1.18 for 18% GST. The difference is the tax.
For sales within a state in India, GST is split equally between the Central GST and the State GST. Sales between states use IGST.
The rate for your product or service. GST rates are set by the GST Council — check the current schedule or your invoice.
Because 18% of the tax-inclusive price is more than the tax. You must divide by 1.18.
The maths is identical; only the name differs between countries.
It uses the standard formula: total = price × (1 + rate ÷ 100) The full method and a worked example are shown on this page.
No. The calculator gives estimates for planning and learning. Real offers vary by lender, product and date, so confirm the details with your bank, lender or a qualified adviser before deciding.
Yes. The maths is identical in any currency; only the currency symbol shown in the results differs.
No. Everything is calculated in your browser and nothing you enter is uploaded or saved.
