Detroit is about 2.2 times smaller than Charlotte.

Charlotte (map shows its 157 named neighbourhoods; the area covers the whole city) is approximately 807 sq km, while Detroit (map shows its 92 named neighbourhoods; the area covers the whole city) is approximately 359 sq km, making Detroit 44.52% the size of Charlotte.
Tip: This to-scale comparison of Charlotte vs. Detroit uses the Mercator projection, which distorts the size of regions near the poles.
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