Factorio Forums

Sorry if this is a dumb question. Folks like to compare/measure their total science production per minute. Are they using a mod to calculate this, or are they doing it by hand?

It's in the game.

https://wiki.factorio.com/Production_statistics

See the production statistics window; click the (graph line) icon above the minimap, or press the assigned key (P by default).

Bear in mind the effect of buffering.