Loud is not just a taste question — it is a hearing question. Enter the level you actually listen at and see roughly how long that is safe for per day, using NIOSH's recommended exposure limit, the standard most consumer hearing-health guidance is built on.
NIOSH's Recommended Exposure Limit treats 85 dB as safe for 8 hours, with a 3 dB exchange rate — every 3 dB louder halves the safe duration, because a 3 dB rise doubles the actual sound energy hitting your ears. OSHA's legal workplace limit is less conservative: 90 dB for 8 hours with a 5 dB exchange rate. Neither figure was written with headphones in mind, but the physics of hearing damage does not care what is making the noise.
This is a general-awareness tool, not a medical device. If you are worried about your hearing, a hearing health professional is the right next step — not a website.