Is a 40 watt amp loud enough?

Hey there, I'm curious about something related to amplifiers. I've been looking into getting a new one for my music setup, and I've come across a 40 watt model. Now, I'm wondering if a 40 watt amp is loud enough for my needs. I'm not planning on playing in huge venues or anything, but I do want to make sure it can handle smaller gigs and practice sessions without any issues. So, is a 40 watt amp loud enough for what I'm looking for, or should I consider going with a higher wattage option? Thanks for any advice you can offer!