Tax Calculator
Calculate prices with or without tax easily. Supports any custom tax rate for VAT, sales tax, GST, and more.
Last updated:
How to Use
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- 1
Select Calculation Mode
Choose whether to calculate from price excluding tax to including tax, or vice versa.
- 2
Enter Amount and Tax Rate
Enter the amount, input your tax rate, and select a rounding method.
- 3
View Results
Price excluding tax, tax amount, and price including tax are displayed in real-time.
Amount
Enter a value between 0.1 and 99.9
Result
Please enter an amount
What is Tax Calculator?
Tax Calculator is an online tool that instantly calculates prices before and after tax, as well as tax amounts. It supports any custom tax rate, making it suitable for calculating VAT, sales tax, GST, or any other consumption tax worldwide. Choose from three rounding methods (round down, round up, or round), and easily convert prices in either direction - from pre-tax to post-tax or vice versa.
Key Features
- Bidirectional calculation: pre-tax → post-tax or post-tax → pre-tax
- Custom tax rate input for any tax rate (0.1% to 99.9%)
- Three rounding methods: round down, round up, or round
- Real-time calculation with instant results
- Works with any tax system worldwide
Use Cases
- Calculate the total price including US sales tax (e.g., California 9.5%, Texas 8.25%)
- Add UK VAT at 20% to a net price to get the gross amount
- Work backwards from a tax-included receipt to find the original pre-tax price
- Compare the after-tax cost of the same item across different US states
- Calculate Canadian GST (5%) or HST for billing and invoicing
- Verify tax line items on expense reports before submitting for reimbursement
FAQ
Why are there no preset tax rates?
Tax rates vary significantly by country, state/province, and even by product type. To ensure accuracy, we let you enter the exact tax rate for your situation. Simply enter your local VAT, sales tax, GST, or any other rate.
What's the difference between rounding methods?
'Round down' truncates fractions ($9.99→$9), 'round up' rounds to the ceiling ($9.01→$10), and 'round' uses standard rounding ($9.49→$9, $9.50→$10). Check with your local tax authority or business for the appropriate method.
How is tax calculated from pre-tax to post-tax?
Tax = Pre-tax price × Tax rate. Then rounding is applied to the tax amount, and post-tax price = pre-tax price + tax. For example, $100 × 10% = $10 tax, so $110 post-tax.
How is pre-tax calculated from post-tax?
Pre-tax = Post-tax ÷ (1 + tax rate). For example, $110 ÷ 1.10 = $100 pre-tax. Rounding is applied to the tax amount.
Is my data saved?
No. Tax calculations run as JavaScript in your browser. Input data is not transmitted or stored on any server.
Editorial Review & References
- Reviewed by
- Toolsbase Editorial Team
- Last reviewed
References
- Japan National Tax Agency — Consumption Tax OverviewOpens in a new tab
- Japan National Tax Agency — Reduced Tax Rate SystemOpens in a new tab
- Japan National Tax Agency — Qualified Invoice System (Invoice System)
- OECD — Consumption Tax Trends
Disclaimer
This tool provides general tax-inclusive/tax-exclusive conversion as reference values. Actual consumption tax amounts will vary based on taxable/non-taxable classification, reduced tax rates (e.g., 8% for food), business categories (exempt/taxable/simplified), and the Japanese invoice system (Qualified Invoice System). For accurate tax calculations in tax filings or business transactions, please consult a tax accountant, the National Tax Agency, or your local tax office.