Google WorkspaceProductivity

Where Google's Currency Data Actually Comes From

8apps Team·

Millions of people trust the rate Google shows them. Here's what Google actually promises about that number – who supplies it, how delayed it is, and what it is not for – documented line by line.

The most-trusted number nobody has read the label on

Type "100 usd to eur" into Google, or =GOOGLEFINANCE("CURRENCY:USDEUR") into Sheets, and you get a number you will probably treat as the exchange rate. This page is just the label – what Google actually says about that number, quoted from Google, because almost nobody has read it. Everything below was re-read on 16 September 2026.

Who supplies it

The answer is on Google's Finance disclaimer page, in the data-listing table most people never scroll to. Under "Currencies and gold spot rates" it states: "Currency and cryptocurrency prices provided by Morningstar." The same table gives the delay for currency data as 3 minutes, globally. So the rate in a Google search box is a Morningstar feed, a few minutes old – not an interbank quote, not a central-bank fixing.

What Google promises (quoted)

  • On accuracy, under a heading of its own, Currency Conversion: "Google cannot guarantee the accuracy of the exchange rates displayed. You should confirm current rates before making any transactions that could be affected by changes in the exchange rates."
  • On the whole service: "Content is provided 'as is' for informational purposes only and does not constitute financial, legal, tax, or investment advice." And: "Data is provided by financial exchanges and other content providers and may be delayed as specified by financial exchanges or other data providers. Google does not verify any data and disclaims any obligation to do so."
  • In Sheets specifically, the GOOGLEFINANCE help page describes the live price attribute as "Real-time price quote, delayed by up to 20 minutes" – a wider window than the disclaimer's 3 minutes, and the two pages do not reconcile it. It also says GOOGLEFINANCE "is only available in English and does not support most international exchanges," that Google "treats dates passed into GOOGLEFINANCE as noon UTC time", and – the line that surprises developers – "Historical data cannot be downloaded or accessed via the Sheets API or Apps Script."

There is no public FX API and no refresh-interval commitment anywhere in that set.

The undocumented workhorse

Odder still: the CURRENCY: prefix that all Sheets currency work rests on appears nowhere on Google's GOOGLEFINANCE help page – no example, no note. The only Google-hosted places it shows up are community threads. The most-used currency feature in Google Sheets is, formally, folklore that happens to work. It has worked for years and likely will keep working – but "widely used" and "documented" are different promises, and Google has only made one of them. When it breaks, the troubleshooting guide is the reference Google didn't write.

So which rate should you use for what?

  • Getting a sense of a price – Google's number is fine; a few minutes of delay and a third-party feed don't matter at gut-check precision.
  • Bookkeeping and invoices – fine with the rate frozen and dated in your records (paste-values, note the date); auditors dislike self-recomputing numbers more than they dislike any particular source. Historical exchange rates in Google Sheets shows the pattern.
  • A documented, citable reference – the ECB publishes daily euro reference rates, free, with full history and its own honest label: "The reference rates are published for information purposes only. Using the rates for transaction purposes is strongly discouraged." Central banks generally are the citable tier.
  • Trading or anything transactional – Google has told you in writing to confirm the rate somewhere else first.

The everyday tier is where most of us live

For the daily gut-check tier – a price in an email, a figure in a doc – the practical question is reach, not provenance: Sheets has GOOGLEFINANCE, and nothing else in Workspace has anything. Currency Converter covers that gap with a sidebar inside Gmail, Docs, Calendar, Slides and Sheets – live rates for 180+ currencies, unlimited and free in the sidebar, no sign-up – with a Premium Sheets formula for historical rates back to 2000.

Sources

Tags

google financegooglefinanceexchange ratescurrency conversiongoogle sheetsdata sourcescurrency converter8apps
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