For those who work in the world of legal costs law it is generally recognised as being, at best, an art rather than a science.
However, the other day I stumbled across an attempt to make the process of predicting legal fees more accurate. I don’t know what other people stumble across on the internet but I suspect some are using slightly different search terms to me.
A Canadian law firm offers the online Legal Fees Guesstimator. You enter some very basic details of your future family trial and it produces a guestimate of the likely legal costs.
I have no idea how accurate it is but can confidently state that it is sure to produce more accurate figures than many of the claimant legal costs estimates I see here.