I have a long term relationship with a client who has been good to me (and for whom I have become a trusted resource). However, I am billing them at a rate that was set at the beginning of 2021. I am about to enter into discussions about increasing my rate for the start of 2024. At the very least I want to compensate for inflation since the beginning of 2021, but after googling a bunch of inflation calculators I am very confused (or maybe I just don't trust them - one of them suggested a 63% increase).
So based on (for example) a $100/hr rate after January 1st, 2021, what would be an inflation adjusted rate for the beginning of 2024?
I'm specifically interested in inflation in the US, but I'd be happy with a general solution which allows me to plug in general inflation values.