Yes, indeed, significant digits is certainly one of the terms I need.* I couldn't for the life of me remember that term, nor the closely related 'margin of error' when I first wrote my original post...* Googling with "significant digits" hasn't yet led me to how to answer the question.I did find this link to a pdf discussing estimation of required significant digits, and I think it very likely applicable to my question, but the paper is far enough above my head that I'm unable to use that link without further assistance. -Scott **Update: **Ack, I hadn't seen trammell's post below when I posted this, I'm studying it now...
| [reply] |

Comment onRe: OT: How much float precision needed for operation?