# Tips to estimate big migrations Estimating big migrations is always complicated, and error prone. If you're forced to do it for a software project, then try to use the process below. Process: - Count the number of LOCs in your project - Count the number of LOCs per week (LPW) in your project - The `LOC/LPW` corresponds to the raw time to migrate (TTM) - Multiply TTM by 1.4 to obtain a reasonable estimate of the time to perform a big migration Formula: `TTM Estimate = (LOC / LPW) * 1.4` ## References - https://xlts.dev/blog/2021-01-15-the-math-of-migrating-from-angularjs