El Salvador is about 51 times bigger than Athens.

Athens is approximately 412 sq km, while El Salvador is approximately 21,041 sq km, making El Salvador 5,007% larger than Athens.
Tip: This to-scale comparison of Athens vs. El Salvador 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.