Crypto Converter

CoinGecko's open API, which aggregates prices across many exchanges into a volume-weighted figure — a fair 'what's it worth' number rather than any single exchange's tick. This page refreshes at most once a minute to stay polite to a free service. For watching a fast-moving market candle by candle, use an exchange's own interface; for converting an amount or checking a balance's value, an aggregate at minute freshness is the honest right tool.

Three legitimate reasons. Exchanges genuinely trade at slightly different prices — arbitrage keeps them close, not identical, and the aggregate sits somewhere in the middle. Your exchange shows its own order book's last trade, which wobbles second to second. And the price you'd actually transact at includes their spread and fees, typically 0.1–1.5% depending on the platform. Differences under a percent are normal market texture, not an error on either side.

The change in the coin's USD price versus exactly 24 hours ago — a rolling window, not a calendar day, so it shifts continuously (crypto trades around the clock with no market close; there's no 'today's open' the way stocks have). Worth calibrating against: daily moves of several percent are ordinary in crypto where they'd be headline news in stock indexes. The arrow is context, not a signal.

For rough portfolio math, yes; for actual tax reporting, use the price at your transaction moment from your exchange's records — most jurisdictions (including the IRS) want the fair market value at the time of each disposal, and your exchange's trade history is the authoritative source since it's what you actually received. Aggregate spot prices are the right sanity check and the wrong primary record. Crypto tax software exists precisely because this bookkeeping gets tedious fast.