El Salvador is about 788 times bigger than Sydney.

Sydney is approximately 27 sq km, while El Salvador is approximately 21,041 sq km, making El Salvador 78,705% larger than Sydney.
Tip: This to-scale comparison of Sydney 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.