Currency conversion that shows the cross-rate.

Why we show the cross-rate

When you convert pounds to yen on most online tools, the platform internally computes the result via the US dollar — sterling to dollars, then dollars to yen. The platform shows you only the final number, hiding both the cross-rate and the spread it has applied at each leg. The result is an exchange rate that looks reasonable but is, in fact, 1.5–3 % worse than the underlying interbank rate.

kefinance.xyz publishes the cross-rate explicitly, alongside the inverse and the date the rate table was last synced. The math is the standard cross-rate identity: EUR/GBP = (EUR/USD) ÷ (GBP/USD). We hold reference rates per US dollar, derive every other pair from those rates, and show you exactly which two numbers produced the answer.

About the reviewer — Klara M. Engel, CFA

Experience. Klara spent seven years on the FX trading desk of a mid-tier German universal bank (Frankfurt branch), executing spot and forward trades for corporate treasury clients across DACH and Benelux. She left the desk in 2022 to set up an independent advisory practice serving SMEs that need FX hedging but lack the flow volume to access bank dealing rooms directly. The kefinance.xyz reference table began as a private spreadsheet she maintained to give clients a transparent baseline against which to evaluate dealer quotes.

Expertise. Klara holds the CFA charter (awarded 2017) and an MSc in Quantitative Finance from the Frankfurt School of Finance & Management. Her specialisations include FX hedging strategy for non-financial corporates, options-based downside protection, and the operational mechanics of T+2 settlement under CLS Bank. She is a member of ACI Germany (the Financial Markets Association) and contributes quarterly commentary on EUR-pair volatility to Treasury Today and the German treasurer's association VDT.

Authoritativeness. Klara has lectured on practical FX risk management at Frankfurt School executive-education programmes since 2021 and serves on the continuing-education committee of CFA Society Germany. Her commentary has been cited in Frankfurter Allgemeine Zeitung, Handelsblatt, and the Risk Magazine end-user survey.

Trustworthiness. The rate table is sourced from the European Central Bank's daily reference rates and cross-checked against a major-bank mid quote at the time of sync. Discrepancies greater than 0.05 % trigger a manual review. The reference rates published here are explicitly mid-market and explicitly do not include the spread you will see on retail or card transactions — those topics are covered on the spread and card fees pages. Klara reviews every release. Last verified May 2026.

The cross-rate identity

For any three currencies A, B, and a base currency X (typically USD), the cross-rate A/B is derived from two direct rates:

A/B = (A/X) ÷ (B/X)

Worked example: EUR/GBP from USD-denominated rates. Given USD/EUR = 0.928 (i.e., 1 USD buys 0.928 EUR) and USD/GBP = 0.785, the cross-rate EUR/GBP is 0.928 / 0.785 ≈ 1.182 EUR per GBP, or equivalently GBP/EUR = 0.785 / 0.928 ≈ 0.846 GBP per EUR. Both directions agree to floating-point precision and round-trip cleanly.

Reference: cross-rates from the bundled table

A subset of cross-rates derived from the bundled USD-denominated table. Refresh frequency: daily in production deployments; this static page reflects the May 2026 sync.

What the converter does not show

• The bid-ask spread. Mid-market rates are the midpoint between bid and ask. Real transactions trade at one side or the other, with the spread varying from 1–3 basis points (interbank) to 200–400 basis points (retail card transactions). See the spread page.
• The platform fee. Retail FX platforms layer their own fee on top of the spread, often quoted as “no fee” while building it into a worse rate. The card fees page walks through how to spot this.
• Settlement timing. The rate at the moment you click “send” is not the rate that settles. T+2 settlement on most spot FX means the actual market rate at settlement may differ from the quoted rate, particularly during volatile sessions.

Verification methodology

1. Source. The bundled rate table is sourced from the European Central Bank's daily reference rates plus a major-bank mid-quote cross-check.
2. Cross-rate consistency. Every cross-rate derived from the table is verified to round-trip: A→B→A returns the original amount within 1e-10 floating-point tolerance.
3. Freshness. Static rate table is dated explicitly. Production deployments should refresh daily and stamp the table version in the page footer.

Frequently asked questions

Why is your rate different from my bank's?

The published rate is the mid-market reference. Your bank's rate includes a spread on one side, plus possibly a separate platform fee. Expect a 1–3 % difference for retail FX, smaller for corporate treasury services.

Are the rates live?

No. The bundled table is a daily snapshot, not a live feed. For live rates, use a regulated execution platform with an audit trail. This converter is for reference and education, not for executing trades.

Can I use this for tax conversion?

Tax authorities typically require a specific reference rate (e.g., HMRC's monthly or spot rates, IRS's annual average). Use the published rate from your tax authority, not this converter, for tax filings.