Consumption tax calculator
Convert between net and gross prices at a chosen rate — Japan's 10%/8% presets included.
How to use
- Choose net→gross or gross→net.
- Enter the amount and rate.
- Read net, tax, and gross.
What it supports
Amounts up to 1,000,000,000 and rates 0–1000%. The tax portion rounds down (切り捨て), matching the common Japanese invoice convention — actual rounding can differ by seller. Foreign currencies work the same way since only the rate matters.