California is 74.8% larger than the United Kingdom (1.75 times the size). Areas below are total areas from national statistics; the Mercator factor shows how much a standard web map inflates each one.
California is larger by 70,068 sq mi (181,475 km²).
Share of the two areas combined (true area, not map area)
| Metric | 🇺🇸 California | 🇬🇧 United Kingdom | Ratio / Difference |
|---|---|---|---|
| Total Area (Sq Miles) | 163,696 sq mi | 93,628 sq mi | 1.75x |
| Total Area (Sq Kilometers) | 423,970 km² | 242,495 km² | 1.75x |
| Population | 39,538,223 | 67,700,000 | 1.7x less |
| Population Density | 242 people / sq mi | 723 people / sq mi | UK 3.0x denser |
| Capital or Seat | Sacramento | London | - |
| Largest Metropolitan Area | Los Angeles | London | - |
| Latitude Center | 37.0° | 54.5° | 17.5° lat diff |
| Mercator Area Inflation Factor | 1.57x | 2.96x | 0.53x visual distortion |
Because the UK sits at 54°N while California sits at 37°N, the Mercator projection inflates the UK to appear nearly as large as California on world maps.
Mercator projection formulas stretch surface area proportionally to sec²(φ) = 1 / cos²(φ), magnifying landmasses drastically near the north and south poles.
California covers 163,696 square miles, making it 1.75 times larger than the entire United Kingdom (93,628 square miles). California's economy is also slightly larger than the UK's GDP.
California is home to the General Sherman tree, the largest living tree on Earth by volume.
The UK contains four constituent nations: England, Scotland, Wales, and Northern Ireland.
Mercator factors use the center latitude only (area scale = 1 / cos² of latitude), so they are approximations for places that span many degrees of latitude.
Use published areas from national statistics offices or census gazetteers rather than judging by pixels on a flat web map.
Remember that Web Mercator tiles distort areas by 1/cos²(latitude). High-latitude regions appear vastly larger than equatorial states.
Drag one outline over the other in the true size tool; the shape is re-projected as it moves, so it keeps its real size.
Yes. California is roughly 75% larger than the entire United Kingdom.
Yes. The United Kingdom easily fits within California with over 70,000 square miles remaining.
United Kingdom has about 67,700,000 people versus 39,538,223 in California, roughly 1.7 times as many. Per square mile, that is about 242 people in California and 723 in United Kingdom.
