Is 100Kg a Good Bench Press?

Yes, 100kg is respectable.

Is 100 kg bench press easy?

Yes. I did 4 reps with 100kg on flat bench without any spot ( no onw was in the gym). And that's look like a big achievement. But it's very easy.

How many kg is a good bench press?

The average bench for a male 24-year-old is 1.5 times bodyweight. The average bench for a female 24-year-old is 1.0 times bodyweight. Depending on the weight class, bench presses will range from 75kg to 168kg for men and 51kg to 75kg for women.