Add GST
100 × 18% = 18.00 INR. Gross total 118.00 INR.
Free online GST calculator
India GST Calculator
Calculate GST for India instantly. Add or remove tax, use different rates for different items, and see net, tax and gross totals in INR.
IndiaGST 18% common editable preset — multiple slabsINR
Last reviewed:
GST Calculator
GST Calculator
Calculate GST for India instantly. Add or remove tax, use different rates for different items, and see net, tax and gross totals in INR.
India uses multiple GST slabs. 18% is a common editable preset, not a universal rate.
GST—
Gross total—
Net total—
GST—
Gross total—
Rates and tax treatment can vary by product, service and transaction. Verify the applicable rate with the official tax authority.
How to calculate GST
For a price before tax, multiply the net amount by the tax rate and add the tax to get the gross total. To remove tax from a tax-inclusive total, divide by 1 plus the rate as a decimal.
- GST = net × 18 ÷ 100
- Gross total = Net total + GST
- Net total = Gross total ÷ (1 + rate ÷ 100)
Input GST vs Output GST Calculator
Estimate output tax on taxable sales and input tax on eligible purchases. Filing rules and recoverability can require adjustments.
Output GST—
Input GST—
Difference—
Import Duty, GST & Landed Cost Calculator
Estimate customs value, duty and import tax with editable rates. Actual customs valuation rules can differ.
Customs value—
Duty—
GST—
Estimated landed total—
Official GST source
Rates and tax treatment can vary by product, service and transaction. Verify the applicable rate with the official tax authority.
GST 18% common editable preset — multiple slabs — India. Last reviewed 2026-09-13.
Official source — Central Board of Indirect Taxes and Customs ↗Worked examples
Remove / Reverse GST
118.00 ÷ 1.180 = 100.00 INR.
GST calculator FAQ
Can I use a different GST rate for each item?
Yes. Add multiple items and enter a separate rate for each line.
Can I remove GST from a total?
Yes. Choose Remove / Reverse GST and enter the tax-inclusive amount.
Is the preset rate always correct?
No. The preset is a starting point. Reduced, zero, exempt and special rates may apply.