Guam vs Puerto Rico

Puerto Rico is 16.7 times larger than Guam. Guam would fit into Puerto Rico about 17 times.

GuamPuerto RicoGuam moved onto Puerto Rico · Equal-area projection
0.06×
Guam is 0.06× the area of Puerto Rico. Put the other way, Puerto Rico is 16.7× the size of Guam.
GuamPuerto Rico
Area544 km²9,104 km²
Population168,9993,184,835
Density311 / km²350 / km²
CapitalAganaSan Juan
RegionMicronesiaCaribbean
CoastlineHas a coastHas a coast
Neighbours00

Why the map you grew up with disagrees

On a Mercator map, area grows with distance from the equator. Guam sits at about 13°N and is stretched to 1.06× its true area; Puerto Rico at 18° N is stretched to 1.11×. Here the two are distorted about the same amount, so Mercator gets this pair roughly right. The figure above uses the Equal Earth projection, where every square kilometre is drawn the same size.

Questions about this pair

Is Guam bigger than Puerto Rico?
No. Guam is 16.7 times smaller than Puerto Rico. Guam covers 544 km² and Puerto Rico covers 9,104 km².
How many times does Guam fit into Puerto Rico?
About 17 times: Puerto Rico has 16.7× the area of Guam.
Why do Guam and Puerto Rico look different on Google Maps?
Web maps use the Mercator projection, which stretches area with distance from the equator. Guam is drawn about 1.06× its true area there and Puerto Rico about 1.11×. For this pair the distortion is similar, so Mercator gets the comparison roughly right. Kartavera uses Equal Earth, where every square kilometre is drawn the same size.
Which has more people, Guam or Puerto Rico?
Puerto Rico: 3,184,835 people against 168,999. Density: Guam 311 per km², Puerto Rico 350 per km².