London is about 6 times bigger than Milwaukee.

Milwaukee is approximately 249 sq km, while London (including the 32 boroughs of greater London) is approximately 1,572 sq km, making London 531% larger than Milwaukee.
Tip: This to-scale comparison of Milwaukee vs. London uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.