Enter values and click “Check conversion”.
How to use
Use this to confirm a conversion you already have a rate for.
- Enter Amount and Rate ("1 FROM = ? TO").
- Optionally add fee %, fixed fee, and tax %, and choose whether each is added or subtracted.
- Select a rounding rule (common: 2 decimals).
- Enter an Expected total to compare, then click Check conversion.
FAQ
Does this tool fetch live exchange rates?
No. It stays offline and uses the rate you enter, which is better for verifying a specific quoted conversion.
How do I enter the rate?
Use “1 FROM = ? TO”. For example, if 1 USD = 0.92 EUR, enter rate 0.92.
Are fees applied before tax?
Yes. The tool applies fee % and fixed fee first, then applies tax to the post-fee amount.
What does “Fee mode” mean?
“Subtract” models a conversion fee taken out of the result; “Add” models a surcharge added on top.
Why doesn’t my computed total exactly match my receipt?
Differences usually come from rounding rules, fee order, or the rate being rounded differently than what the provider used.
What tolerance should I use when comparing to an expected amount?
Common values are 0.01 for 2-decimal currencies, or 0.5 when checking 0-decimal rounding.
Can I paste values instead of filling every field?
Yes—use Quick input with key=value pairs like amount=100 rate=0.92 feePct=2, then click “Apply quick input”.