Free GST Calculator Online

Calculate CGST, SGST, and IGST instantly for all GST slab rates. No signup, no ads, no hidden charges. Trusted by 50,000+ Indian businesses.

✓ 100% Free ✓ No Login Required ✓ Made in India ✓ Updated for 2026

Calculate GST Instantly

Enter any amount. Get CGST, SGST, IGST breakdown for all slab rates in one click.

Open GST Calculator → Embedded Calculator

Why Use DoAide GST Calculator?

All Slab Rates

Supports 5%, 12%, 18%, 28% GST rates plus cess calculations. Inclusive and exclusive modes.

CGST + SGST + IGST

Automatic split for intra-state (CGST + SGST) and inter-state (IGST) transactions.

Instant Results

No waiting, no page reloads. Results appear instantly as you enter amounts.

Free Forever

No signup, no premium tier, no trial. Every feature is free — today and always.

Works on Mobile

Fully responsive design. Use on phone, tablet, or desktop. Works offline as PWA.

More Than a Calculator

Also includes GSTIN lookup, HSN code search, ITC calculator, and filing date calendar — all free.

More Free GST Tools

GST Calculator HSN Code Finder Invoice Generator ITC Calculator GST Due Dates Penalty Calculator Composition Scheme GST Bot

Frequently Asked Questions

How to calculate GST online for free?

Use DoAide's free GST calculator at gst.doaide.com/calculator. Enter the amount, select the GST rate (5%, 12%, 18%, or 28%), choose inclusive or exclusive mode, and get instant CGST, SGST, or IGST breakdown. No signup required.

What is the difference between CGST, SGST, and IGST?

CGST (Central GST) and SGST (State GST) apply to sales within the same state (intra-state). IGST (Integrated GST) applies to sales between different states (inter-state). The total GST rate stays the same — only the split changes.

Is the DoAide GST calculator free?

Yes, 100% free. No signup, no login, no hidden charges. Calculate GST instantly for any amount at any slab rate. Plus get free GSTIN lookup, HSN code search, and filing date reminders.

What are the GST slab rates in India 2026?

India has four main GST slab rates: 5%, 12%, 18%, and 28%. Some items are exempt (0%). Special rates include 0.25% (rough diamonds) and 3% (gold, silver). A compensation cess applies to certain luxury goods above 28%.

Can I use the GST calculator on mobile?

Yes. The DoAide GST calculator is fully mobile-responsive and works on all devices — phones, tablets, and desktops. It also works offline as a Progressive Web App (PWA). No app download needed.