Btw, there is another fine tool: Factorio-Calc
http://rubyruy.github.io/factorio-calc/
I highly recommend to use such tools after the second game or so, cause the problem is here, that we have so many "basic" ratios in this game, that the list would be really long.
And the second problem is: what are basic ratios? I understand there: production ratios till science pack 3 (blue option).
But it would be an idea, to gather them here, cause I plan to put such a "basic" list into the wiki. I begin with:
Mining/furnacing
- Two burner miners per one stone furnace (one is of course also ok).
- if you need more than 10 burner miners in total, you do basically something wrong
- 10 electric miner per 12 stone furnace (for ore) (well, this is not nicely calculated)
- you can feed up to 12 furnaces with one basic belt (without curves!) using one lane for coal and one for the iron. Begin with 8, you need some fast belts later.
- you need of course some more ore, plan with 20-30 furnaces for iron and 15-25 for copper in your first game. I tend to have about five-10 times more...
but I built that many then at a completely different place, so in the first games it's a good plan to built not more than that, also because the pollution will be a problem then.
- until you don't produce science pack 3, your need for copper is low, compared with the need for iron, so always built up iron first.
- you need 6-12 furnaces for steel production (first build 2, then expand as your need rises). They need 6-12 furnaces to fill them with iron.
- for stone you need in the early game just one burner miner, later on 2-4 electric miners will do it.
- you need 1-2 furnaces for that, but make sure, that you always have a chest full with raw stone.
- you need one assembly to make stone walls. Again: make sure to have a chest full of stone bricks
I hope I didn't forget or mixed up stuff.
I tried to make it simple, you see, the number 12 plays an important role, easy to remember during game, when you need to make some simple calculations in your head. But always make it smaller in the beginning, don't place 12, try it with 6 first. Then expand to the limit (or one below and built a second line instead).