Methodology
This page explains exactly how the counters work, what source each page uses, and where the main caveats are. It helps visitors understand that these pages are estimate tools built from the latest published official averages, not direct real-time government sensors.
U.S. page method
- Source: EIA weekly U.S. field production of crude oil.
- Unit: barrels per day, based on the latest published weekly average.
- Display logic: the latest weekly average is converted into a smooth live-style estimate for the current day, week, month, and year to date.
- Value logic: daily EIA WTI/Brent prices are used as a benchmark to estimate headline value.
Global page method
- Source: EIA top-producer world total oil production basis.
- Unit: barrels per day, based on the latest published world total in the source basis.
- Display logic: the published annual world total basis is converted into a smooth live-style estimate.
- Country table: official EIA top producers and their shares of world total from the same source basis.
Important limitations
The U.S. page and the global page do not use identical definitions. The U.S. page is crude-oil focused because that weekly EIA series is a strong, frequently updated public source. The global page uses EIA’s international total-oil ranking basis because that is the most practical official cross-country comparison source in this build.
Why we explain the math
Pages with counters alone can feel thin or confusing. This methodology page gives the site more transparency, clarifies the limits of the estimates, and helps support ad approval by making the site feel complete and trustworthy.