GST Calculator
Computes GST-inclusive and GST-exclusive amounts for Indian tax slabs (5%, 12%, 18%, 28%) with net, GST value, and total shown. Details never leave your device — validation and generation run locally in your browser.
How to Use the GST Calculator
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Frequently Asked Questions
Which GST slabs are supported?
All four Indian GST slabs: 5% (essential items), 12% (processed food, business services), 18% (most goods and services), and 28% (luxury items). Select the applicable rate for your calculation.
Can I calculate both GST-inclusive and GST-exclusive amounts?
Yes. Enter the base amount to get the GST-inclusive total, or enter the inclusive amount to reverse-calculate the base price and GST component. Defaults: ₹1,000 at 18% Add gives ₹180 GST and ₹1,180 total; results export to gst-calculation.csv.
Does it show the HSN/SAC code?
No — there are no HSN/SAC hints. Look up the HSN (goods) or SAC (services) code for your item separately, then pick the matching slab here for the math.
Is this useful for GST return filing?
Yes. It helps you quickly verify GST amounts on invoices, cross-check input tax credit calculations, and ensure correct slab application before filing GSTR-1 or GSTR-3B returns.
Are calculations performed on the server?
No. All GST calculations run locally in your browser. No financial data is transmitted or stored.
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Last updated October 2026