Free Invoice Calculator
Calculate invoice totals instantly. Add line items, apply tax and discounts, switch between itemized and hourly billing modes.
Lineas de Factura
| Descripcion | Cant | Rate ($) | Monto | |
|---|---|---|---|---|
| $0.00 |
Facturacion por Hora
How to Use the Invoice Calculator
Agregar Lineas
Enter your products or services with quantities and rates. Use Hourly Mode for time-based billing.
Apply Tax & Discounts
Add your local tax rate and any discounts (percentage or flat amount).
Get Your Total
See your invoice total instantly. Print the results or create a real invoice.
Preguntas Frecuentes
How do I use the invoice calculator?
Simply add line items with descriptions, quantities, and rates. The calculator automatically computes subtotals. Then add tax percentage and any discounts to get your final invoice total.
Can I calculate hourly billing?
Yes! Switch to Hourly Mode and enter your hourly rate and hours worked. The calculator will compute your subtotal, then you can apply tax and discounts.
Is this invoice calculator free?
Yes, this invoice calculator is completely free to use. No signup or credit card required. Use it as many times as you need.
How do I add tax to my invoice?
Enter your tax rate as a percentage (e.g., 8.25 for 8.25% sales tax). The calculator automatically applies tax to your subtotal after any discounts.
Can I apply discounts?
Yes! You can apply either a percentage discount or a flat dollar amount discount. The discount is applied to the subtotal before tax is calculated.
Need to Create Real Invoices?
Turn your calculations into professional PDF invoices. Track payments, send reminders, and get paid faster with InvoiceKits.