Sumyard

Sales tax calculator

Add or remove your entered tax rate across a set of line items.

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Your inputs

Updates as you type
Line item amountsEnter one amount per row, or paste amounts separated by commas, spaces or new lines. Up to 1,000 rows.
Item 1
Item 2

2 item rows.

tax-inclusive total

$135.00

Net amount
$125.00
Tax
$10.00

Use rates and taxability rules appropriate to your own transaction.

Calculations happen in your browser. Saving is optional.

Calculation breakdown

2 rows · View table
Sales tax calculator — calculated breakdown
LineNetTaxGross
1$100.00$8.00$108.00
2$25.00$2.00$27.00

How to use this tool

Enter the line-item amounts, one tax rate and whether the amounts already include tax.

Read the before-tax, tax and total amounts together. This tool does not determine the legally applicable rate.

Tax-inclusive = net × (1+rate); net = inclusive / (1+rate)

Worked example

$135.00 · tax-inclusive total

Fixed example using the settings below. Monetary examples use USD; dates and times use their stated reference values. This example stays unchanged when you edit your calculation.

Example inputs
  • Line item amounts: 100; 25
  • Entered tax rate (%): 8
  • Amounts are: Before tax

Method illustration: 100 before 8% tax becomes 108; 108 inclusive contains 8 tax.

Assumptions and limits

  • No jurisdiction is inferred. Applies one uniform entered rate and rounds the final total, not individual tax lines.

Check or report a result

Check the units, selected calculation and assumptions first. Compare the fixed example above with your inputs to identify what changed.

Report a calculation issue with the page address, hypothetical inputs, result displayed and result expected. Do not include passwords, bank details or other private information.