Also worth trying getguesstimate.com. Unfortunately development on it is abandoned, as far as I know. I made my own text-based tool for this at one point, but

Also worth trying getguesstimate.com. Unfortunately development on it is abandoned, as far as I know. I made my own text-based tool for this at one point, but I lost it when I switched jobs. I would like to recreate it except more generally useful. I would also like to make it compatible with the SIPMath standard (which are an open standard for conveying empirical distributions, e.g. as business-relevant inputs to estimations, or the outcomes of them.)