Invoicing
Invoice Calculator
Add your line items, apply a discount and tax rate, and get a clean total ready to print or save as a PDF — no account needed.
Invoice total
$3,000.00
- Subtotal
- $3,000.00
- Discount
- −$0.00
- Tax
- $0.00
Runs entirely in your browser — nothing here is uploaded or stored anywhere.
How this calculation works
Line items sum to a subtotal
Each line is quantity × unit price. All lines are added together for the subtotal.
Discount, then tax
Discount is subtracted from the subtotal first; tax is then calculated on the discounted amount to produce the final total.
Frequently asked questions
Does this store or send my invoice data anywhere?+
No. Every calculation happens locally in your browser. Nothing you type is uploaded to a server, so it's safe to use for real client numbers.
How do I save this as a PDF?+
Click 'Print / Save as PDF', then choose 'Save as PDF' as the destination in your browser's print dialog instead of a physical printer.
Is discount applied before or after tax?+
Discount is applied first, to the subtotal. Tax is then calculated on the discounted amount, which matches how most invoicing and accounting software handles it.
Already built a Project Quote? Copy its total straight into a line item here to turn it into a billable invoice.