Just a note to share my experience.
SGD to AUD is 1 to 1 right now, but the AUD to KRW rate is a little better than the SGD to KRW rate. So what I did on my trip in mid-March was I changed SGD to AUD, and brought the AUD to Myeongdong to change. The SGD rate was 816, the AUD rate was 825 or so.
Honestly it doesn't make that much of a difference if you're not changing large amounts, but it's an option that can be considered.
SGD to AUD is 1 to 1 right now, but the AUD to KRW rate is a little better than the SGD to KRW rate. So what I did on my trip in mid-March was I changed SGD to AUD, and brought the AUD to Myeongdong to change. The SGD rate was 816, the AUD rate was 825 or so.
Honestly it doesn't make that much of a difference if you're not changing large amounts, but it's an option that can be considered.