Source

Rates come from Rates By Exchange Rate API (open.er-api.com, USD base, published by the source about every 24 hours).

This is a USD market midpoint from open.er-api.com. It is not a bank rate, and it is not guaranteed to match Google or any other site.

How to read the times

• Last successful sync (the primary time): when this site last accepted data from the source. If the latest attempt failed, the page says so and keeps the previous accepted data until it expires.
• Source quote time: when the source published this rate. Syncing the same rates again does not mean the rate changed.

How often this site asks

Requests to the source are at least 1 hour apart, including across restarts. Failures back off, up to 12 hours. Opening a page does not request a new rate.

Freshness

• Source quote time within 26 hours: shown as up to date.
• Past 26 hours and under 72 hours: the numbers stay, with a delayed warning.
• 72 hours or more, or the source has stopped: the numbers are hidden and the result is temporarily unavailable.

Calculation

A cross rate is amount × target rate ÷ source rate, through USD, at full decimal precision. It is rounded once for display (half up). The rate is shown to 6 significant digits, so multiplying the shown rate back can leave a remainder.

What this site does not do

Under the source terms, these are pages for a person to read. This site does not offer a rate download, an API, or any other programmatic way to pull rates.