Add tax, remove tax from a total, or infer an effective rate with state-average and custom-rate modes.
Change the inputs that matter to your decision. Optional assumptions stay collapsed until you need them.
State values are broad state-plus-local averages; use custom for the actual checkout jurisdiction.
$8.85 of tax at 8.85%.
Taxability can vary by item, city, county, district, and sourcing rule. Verify the final checkout rate.
Practical notes about the inputs, assumptions, and result.
No. State selections are broad combined averages. Use the custom rate from the actual checkout jurisdiction for a closer estimate.
Other tools in shopping & discounts.
Calculate a sale price, reverse a discount, or stack multiple offers and tax in the order checkout applies them.
Normalize mixed package sizes and rank up to six products by unit price, including the gap to the next-best option.
Normalize weekly, monthly, quarterly, and yearly bills, separate active from paused items, and surface the largest review opportunity.