Finance · Tax

GST Calculator

Add or remove GST from an amount — exclusive and inclusive modes with CGST/SGST or IGST.

GST details

GST Mode

100 – 10 Crore

Common rates: 5 · 12 · 18 · 28

GST Type

GST amount

—

CGST —
SGST —
Net amount —
Gross amount —

How this calculator works

Whether you are pricing an invoice or checking a bill that already includes GST, this calculator handles exclusive and inclusive modes.

  1. Choose Exclusive or Inclusive mode.
  2. Enter the amount and GST rate.
  3. Choose CGST + SGST or IGST.
  4. Results update live.

Formula

GST = amount × rate/100

Exclusive: , gross = amount + GST.
Inclusive: GST = amount × rate/(100+rate), net = amount − GST.

Examples

More about this calculator

Practical use cases

Freelancers raising invoices and buyers checking MRP-inclusive GST.

Common mistakes

Adding GST again to an already inclusive price.

Tips

Confirm the HSN/SAC rate for your supply.

FAQs

When the price already includes GST and you want the tax component and net amount.

For intra-state supplies, GST is typically split equally into CGST and SGST. Inter-state supplies use IGST.