Factorio mining drills per belt
30 electric mining drills fill a yellow belt with iron, copper, coal or stone, 60 fill a red belt, 90 a blue belt and 120 a turbo belt. Big mining drills (Space Age) mine five times as fast: 6 per yellow belt.
The numbers behind it
Iron ore, copper ore, coal and stone take 1 second to mine. An electric mining drill has mining speed 0.5, so it mines 0.5 ore per second. A yellow belt carries 15 items per second: 15 ÷ 0.5 = 30 drills.
| Belt | Items per second | Burner drills | Electric drills | Big mining drills |
|---|---|---|---|---|
| Yellow (transport belt) | 15 | 60 | 30 | 6 |
| Red (fast transport belt) | 30 | 120 | 60 | 12 |
| Blue (express transport belt) | 45 | 180 | 90 | 18 |
| Green (turbo transport belt, Space Age) | 60 | 240 | 120 | 24 |
Burner drills mine 0.25 ore per second and big mining drills 2.5. Uranium ore takes 2 seconds to mine, so it needs twice as many drills, plus sulfuric acid.
Mining productivity research
Each level of mining productivity research adds 10% to every drill. After five levels a drill mines 50% more, so a yellow belt fills with 20 electric drills instead of 30. Divide the table by (1 + 0.1 × your level).
How many drills per furnace?
A steel or electric furnace uses 0.625 ore per second, so 30 electric drills feed 24 furnaces: one full yellow belt in, one full yellow belt of plates out. See furnaces per belt.
Ready-made layouts: mining blueprints.