California is 12.2% larger than Japan (1.12 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 17,759 sq mi (45,995 km²).
Share of the two areas combined (true area, not map area)
| Metric | 🇺🇸 California | 🇯🇵 Japan | Ratio / Difference |
|---|---|---|---|
| Total Area (Sq Miles) | 163,696 sq mi | 145,937 sq mi | 1.12x |
| Total Area (Sq Kilometers) | 423,970 km² | 377,975 km² | 1.12x |
| Population | 39,538,223 | 125,100,000 | 3.2x less |
| Population Density | 242 people / sq mi | 857 people / sq mi | Japan 3.5x denser |
| Capital or Seat | Sacramento | Tokyo | - |
| Largest Metropolitan Area | Los Angeles | Tokyo | - |
| Latitude Center | 37.0° | 36.5° | 0.5° lat diff |
| Mercator Area Inflation Factor | 1.57x | 1.55x | 1.01x visual distortion |
Both lie at remarkably similar latitudes (around 36°–37°N), so Mercator distortion affects them almost equally.
Mercator projection formulas stretch surface area proportionally to sec²(φ) = 1 / cos²(φ), magnifying landmasses drastically near the north and south poles.
California is roughly 12% larger than Japan. California covers 163,696 sq mi compared to Japan's 145,937 sq mi. However, Japan has more than three times California's population.
California has 58 counties, ranging from San Francisco (47 sq mi) to San Bernardino (20,105 sq mi).
Approximately 73% of Japan is mountainous and forested, concentrating urban populations along coastal plains.
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 12.2% larger in land area than Japan.
Japan has 125.1 million residents compared to California's 39.5 million.
