We have six, 6-inch can lights in our kitchen, four are controlled via a three way switch and a three way dimmer, and the other two are controlled by a single pole dimmer.
The dimmer switches were put in by the previous owner of this house before we bought the place in 2010. Because this was before the advent of regularly available LED bulbs, the dimmer switches were obviously not created to control LED bulbs.
However, in 2019 I replaced all the BR30 incandescent bulbs in the can lights with BR30 dimmable LED bulbs, and the dimmers work fine, to a point.
Here is what I have found. The LED bulbs light up to full brightness, with no flickering or noise. They do not however dim all the way down from full bright to completely off like the incandescent bulbs did. The LED bulbs will dim down about 75 percent, leaving the bulbs at about 25 percent brightness, but they will not go any lower.
But that is fine with me. I didn't dim the old incandescent bulbs down to anything less than about 50 percent. So the old dimmers that are there are still good in my book.
The dimmer switches are made by Lutron and the LED bulbs are made by Philips. I don't know if this has anything to do with anything, but I thought I would include that info incase someone asked.
To the OP, the easiest way to see if your current dimmers are compatible with LED bulbs is to install the LED bulbs and see if the current dimmer works with them. They may work to your satisfaction like mine did. This is better than spending the money on new dimmers if you don't actually need them.
Jim