Split Bill Calculator
Split a bill among friends using a subtotal, sales tax, tip, and number of people.
Open toolSales Tax Calculator
Calculate sales tax and the total price from a pre-tax subtotal and the rate you enter. Check the tax amount and subtotal together.
Free to useNo sign-upRuns in your browser
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How Sales Tax Calculator works
The entered percentage produces tax that is added to one subtotal.
The subtotal is multiplied by the rate divided by one hundred to calculate tax. That tax amount is added to the subtotal to produce the displayed total; the page does not look up local tax rules.
Uses the rate you enter; local tax rules, exemptions, and rounding on individual items can change the amount charged.
How to use Sales Tax Calculator
Supply the pre tax subtotal and the percentage that applies to the scenario being modelled.
Enter the taxable subtotal and rate
Enter the pre-tax subtotal and applicable sales-tax percentage. Use the purchase basis required for your calculation, including any relevant discount adjustment. The page does not look up a local rate or decide which items are taxable.
Pre-tax subtotal
Calculate the price with tax
Select Calculate and read the price including sales tax. The tax amount is derived from the entered subtotal and rate. A zero rate is accepted and leaves the total equal to the subtotal without adding a tax component.
$55.00
Check the tax component and rounding
Review Sales tax and Pre-tax subtotal separately from the total. This is a one-subtotal calculation, so item-level rounding or exemptions can produce a different invoice amount. Keep the entered tax basis with the estimate when reconciling a purchase.
Sales tax
Checks for a known sales tax rate
Use a common subtotal basis when comparing prices or checking arithmetic.
Check a single price example
A hypothetical $100 subtotal at eight percent produces $8 of tax and a $108 total. This makes the percentage basis visible. It does not determine whether eight percent applies to an item or location in a real purchase.
Compare two quoted subtotals
Run each pre tax amount with the same rate when that rate is appropriate to the comparison. Keep the subtotals and tax amounts with the totals. A tax inclusive quote needs a different starting basis and should not be entered unchanged here.
Review a receipt calculation
Use the subtotal and stated rate from the receipt to check the modelled arithmetic. If the charge differs, review exemptions and how individual lines were rounded. This form calculates tax on the entered subtotal and does not inspect the receipt's items.
Why a receipt can show a different amount
Distinguish the tax component from the total price including tax.
The page applies one entered percentage to one subtotal. A transaction containing items with different tax treatment cannot be described by that arrangement unless the taxable subtotal has already been prepared separately.
Money is displayed to cents. A seller may round individual item taxes before totalling them, which can differ from taxing the whole subtotal once. The result does not decide which local method applies.
Check the amount and percentage basis
Check the taxable basis, rate, and invoice rounding before reconciling amounts.
A rate entered as 0.08 means 0.08 percent in this field, not eight percent. Check the percentage label and use a number without currency or percent symbols. Keep the subtotal free of tax already included elsewhere.
The calculator does not determine exemptions, local tax rules or the correct rate. Use applicable transaction information before entering the figures. For bill sharing with separate tax and tip, Split Bill Calculator includes those additional fields.
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Open toolUse Sales Tax Calculator
Calculate sales tax and the total price from a pre-tax subtotal and the rate you enter.
Sales Tax Calculator: common questions
Answers about using Sales Tax Calculator and understanding its results.
Does this look up my local rate?
No. Enter the rate applicable to your purchase.
Is tax calculated before discounts?
Enter the taxable subtotal after any discount that applies under your local rules.
Can I enter a zero tax rate?
Yes. A zero rate produces zero tax and a total equal to the entered subtotal.
Does this perform item-by-item tax rounding?
No. It calculates from one subtotal. An invoice with separate taxable items, exemptions, or item-level rounding can differ.