How many hours of nap does your 5 month old baby needs? My baby sleeps 12 hrs at night, but during the day, he only naps like 2 - 3 hrs. Is it enough and is it normal?

Yes 2 to 3 hours nap is normal. Sometimes baby will have short naps in daytime and when they are ready they will consolidate their naps into 1 or 2 times.