Currency Converter
Convert between major world currencies with live or manually set exchange rates.
Free · No sign-up · Runs locally in your browser · Also available in Chinese (中文)
What is Currency Converter?
A currency converter multiplies an amount by an exchange rate — the useful part is having the right rate and being clear about its date. This tool converts between major world currencies, shows the rate it used and when it was fetched, and supports custom rates for accounting scenarios where you must use a specific historic rate.
Because the math is local, the tool also works as an offline calculator with manually entered rates — useful on flights, in areas with poor connectivity, or whenever you need exact, reproducible numbers for documentation.
How to use it
- 1Enter the amount and pick the source and target currency.
- 2The conversion updates live using the latest fetched rate.
- 3Check the rate line: it shows the exact value and its timestamp.
- 4For official documents, switch to manual mode and enter the exact rate required.
Common use cases
- Checking what a foreign price actually costs before buying.
- Preparing an expense report with the company's official monthly rate.
- Comparing prices across marketplaces listed in different currencies.
Frequently asked questions
▸Why is the rate different from my bank's?
Public mid-market rates exclude the margin banks and card networks add (typically 1–3%). Treat the result as the fair baseline; your actual cost will be slightly higher.
▸Can I use it offline?
Yes, in manual mode: enter any rate you have (from a receipt, a contract or a central bank fix) and the math runs entirely on your device.