Tempe is about 2.1 times smaller than Seattle.

Seattle is approximately 217 sq km, while Tempe (map shows its 64 named neighbourhoods; the area covers the whole city) is approximately 104 sq km, making Tempe 47.65% the size of Seattle.
Tip: This to-scale comparison of Seattle vs. Tempe uses the Mercator projection, which distorts the size of regions near the poles.
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