Are inputs saved?
Inputs are calculated in your browser and are not sent to a server. When you use sharing, the reproducible URL includes the current conditions.
Money
Sales Tax Calculator
Convert quickly between tax-included, tax-excluded, and tax amount.
Updated: May 15, 2026
Input
Check tax-included, tax-excluded, and tax amount.
Result
¥1,100
Incl. tax
¥1,000
Excl. tax
Tax: ¥100
Use this as a guide and adjust for your real conditions.
Share this tool
How to use
- Enter Amount, Tax rate.
- Check the estimate in the result area.
- Share a reproducible URL if needed.
How to read the result
- Read Tax-included / tax-excluded amount as quick decision-making estimates.
- Do not treat the result as a fixed answer; adjust assumptions to see the range when needed.
Useful tips
- Useful when you want to find the pre-tax price from a tax-included amount; adjust inputs to compare scenarios.
- Change one input at a time to see how payment, shortfall, or cost moves.
- Use values close to the real quote, bill, or checkout screen.
Calculation
Tax-exclusive to tax-inclusive uses `amount x (1 + rate)`; tax-inclusive to tax-exclusive uses `amount / (1 + rate)`, then rounds the result.
Notes
- Use results as a guide.
- This is not tax, labor, or financial advice.
- Actual deductions and conditions can differ.
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FAQ
Are results exact?
Use results as everyday estimates. For exact decisions, confirm with official or specialized sources.
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