# How to calculate a forecast [closed]

I've been looking around to know how to calculate a sales forecast for sales generated. Not profit/loss; only sales made.

Oracle's calculation shows some examples but I'm not sure if that's the standard way to do the calculation. Is there a formula for forecasting? A special formula?

I do know you have to compare previous values with `x` but what is `x`? A percentage?

• if you look at the methods detailed in that link you will notice that the majority are regressions of one type or another which is a standard way of extrapolating series data in statistics and is commonly used by quants and actuaries to generate a sales forecast, amongst other things. Their models will be more complex and in many variables. – MD-Tech Oct 25 '16 at 10:18
• what is the goal of the calculation? knowing that may be determine what sort of factor to use. – mhoran_psprep Oct 25 '16 at 11:38
• Think of it as: being self employed, i need to determine how much money im expected to earn today or next week, based on how I performed in the past (last week, month). – Sylar Oct 25 '16 at 11:40