Amsterdam is about 4 times smaller than Jakarta.

Jakarta is approximately 662 sq km, while Amsterdam is approximately 166 sq km, making Amsterdam 25.04% the size of Jakarta.
Tip: This to-scale comparison of Jakarta vs. Amsterdam 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.