Invoice Calculator
Calculate invoice totals with up to 5 line items, discounts, GST (split as CGST + SGST), and shipping charges. Get a complete tax breakdown summary.
NEWEnter values and click Generate Total to see results
Formula
What Is an Invoice Calculator?
An invoice calculator helps you quickly compute invoice totals including line item subtotals, discounts, GST (Goods and Services Tax), and shipping charges. It provides a complete breakdown of your invoice amounts.
GST on Invoices
In India, GST is split equally into CGST (Central GST) and SGST (State GST) for intra-state transactions. For inter-state transactions, IGST is applied at the full rate. This calculator shows the CGST + SGST split for intra-state invoices.
Subtotal = Sum of (Qty × Rate) for each line item
Taxable Amount = Subtotal − Discount
GST = Taxable Amount × GST Rate / 100
Grand Total = Taxable Amount + GST + Shipping
Invoice Components
A standard GST invoice includes supplier details, buyer details, line items with HSN/SAC codes, quantity, rate, taxable value, CGST, SGST or IGST amounts, discounts, and total amount payable.
Related Tools
- GST Calculator – Calculate GST inclusive and exclusive
- Profit Margin Calculator – Calculate margins on your sales
- Markup Calculator – Determine selling prices
Frequently Asked Questions
How is GST calculated on an invoice?
GST is calculated on the taxable amount (subtotal after discount). For intra-state sales, GST is split equally as CGST and SGST. For inter-state sales, the full rate applies as IGST.
Is this calculator free, and do I need to sign up?
Yes, it is completely free with no sign-up. There are no usage limits and no paywalls.
Are my inputs saved or sent to any server?
No. Every calculation happens entirely in your browser. Nothing you type is uploaded, logged, or shared with us or any third party.