Free tools — no signup, no limits
Seven calculators. Clear answers.
Built for the two questions small businesses and shoppers ask most often: what did this cost before tax, and how much do I need to sell to cover my costs?
- All 50 states and DC
- Every result explained
- Nothing to install
The toolkit
Pick the calculator that matches your question
All are free, work in the browser, and show the working behind every number so you can check it yourself.
Reverse Sales Tax Calculator
Enter a receipt total and the tax rate, and it separates the price before tax from the tax amount. It also works the other way round, compares the same purchase across all 50 states and DC, and checks whether the tax on a receipt matches the rate you were charged.
What it answers
- What was this priced at before sales tax was added?
- How much tax is inside a tax-inclusive total?
- What will this cost with tax added in my state?
- How does the same price compare across states?
- Does the tax on my receipt look right?
Best for: shoppers checking receipts, freelancers separating tax from a gross payment, and sellers pricing tax-inclusive items.
Open the calculator →Break Even Calculator
Work out the sales level that covers your costs, in units or in revenue. Enter fixed costs and either your unit economics or your variable cost ratio, and you get the break-even point, the contribution margin, the profit at your expected volume and the margin of safety, with a chart and a scenario slider.
What it answers
- How many units must I sell to stop losing money?
- What monthly revenue covers my fixed costs?
- What does one sale contribute after its own direct cost?
- How much extra do I need to sell to hit a profit target?
- How much cushion do I have above break even?
Best for: small business owners, e-commerce sellers and anyone testing a price change before committing to it.
Open the calculator →Car Sales Tax Calculator
Work out the sales tax on a new or used car before you sign. Pick your state, enter the price, add a trade-in if you have one, and see the tax and the total due.
What it answers
- How much sales tax will I pay on a car?
- What will the car cost with tax included?
- Does a trade-in lower the tax I pay?
- Which state rate applies to my purchase?
- How much tax is due on a used car?
Best for: buyers comparing new and used cars, and anyone checking a dealer’s tax figure before signing.
Open the calculator →Sales Tax Percentage Calculator
Work backwards from a total to find the rate. Enter the total you paid and the price before tax, and the calculator shows the sales tax percentage that was applied.
What it answers
- What sales tax rate was charged on this total?
- What percentage of the total is tax?
- Was the rate on my receipt correct?
- How do I find the rate from a price and a total?
- What rate turns this price into this total?
Best for: shoppers checking a receipt, and sellers confirming the rate they charged.
Open the calculator →Multi-Item Receipt Calculator
Reverse the tax on up to five items at once. Enter each item’s total and its rate, and see the price before tax and the tax for every item, plus the totals for the whole receipt.
What it answers
- How much tax is on each item?
- What did each item cost before tax?
- How much tax is on the whole receipt?
- Which items were taxed at which rate?
- Do the lines on my receipt add up?
Best for: shoppers with mixed-rate receipts, and anyone splitting a receipt across categories.
Open the calculator →Reverse Sales Tax Excel Template
Download a free Excel template that reverses tax on a list of up to 10 receipts. Enter each total and rate, and the sheet works out the price before tax, the tax, and the totals for you.
What it answers
- How do I reverse tax on many receipts at once?
- What did each receipt cost before tax?
- How much tax did I pay in total?
- Can I keep my calculations in a spreadsheet?
- What formula reverses sales tax?
Best for: freelancers and small businesses logging receipts, and anyone who prefers a spreadsheet to a web form.
Download the template →Sales Tax Rate Lookup by ZIP Code and Address
A guide to finding your exact local rate. There is no single national lookup, so this page points you to the official state lookup for your address or ZIP code, and explains what to check before you use a rate.
What it answers
- Where do I look up my local sales tax rate?
- Which official lookup covers my state?
- Is a ZIP code enough to find my rate?
- Why do rates differ within one state?
- What should I check before using a rate?
Best for: anyone who needs the combined rate for a specific address, and sellers setting up tax for a new location.
Open the guide →Quick chooser
Which tool should I use?
Find the row that matches what you are trying to work out.
Check the tax rate that was actually applied
→Sales tax percentage calculatorWorks backwards from the total
By state
State calculators
Each page opens with the calculator pre-set to that state’s base rate, followed by a guide to how the rate is applied locally. Local taxes can be added on top of the base rate shown.
- New Jersey6.625% base rate
- Pennsylvania6% base rate
- Massachusetts6.25% base rate
- Tennessee7% base rate
- Connecticut6.35% base rate
- Minnesota6.875% base rate
- Missouri4.225% base rate
- California7.25% base rate
- Texas6.25% base rate
- Florida6% base rate
- Ohio5.75% base rate
- New York4% base rate
- Washington6.5% base rate
- Illinois6.25% base rate
- Georgia4% base rate
- North Carolina4.75% base rate
- Virginia5.3% base rate
- Colorado2.9% base rate
- Arizona5.6% base rate
- Michigan6% base rate
- Wisconsin5% base rate
- All statesFull rate table
Read next
Guides that pair with the tools
Short, plain-language explainers for the questions that come up once you have your number.
Start with the number in front of you
If you have a receipt, work backwards from the total. If you are planning a month, start from your costs.How the rates are kept current. State base rates in the calculators were verified in November 2026. Every result is a general estimate and not tax advice — confirm rates with the relevant tax authority or a qualified professional before relying on them.