Factorio belt speeds: items per second for every belt
A yellow belt moves 15 items per second, a red belt 30, a blue belt 45 and a turbo (green) belt 60. Each belt has two lanes, so each lane carries half of that.
| Belt | Items per second | Per lane | Stacked ×4 (Space Age) |
|---|---|---|---|
| Transport belt (yellow) | 15 | 7.5 | 60 |
| Fast transport belt (red) | 30 | 15 | 120 |
| Express transport belt (blue) | 45 | 22.5 | 180 |
| Turbo transport belt (green, Space Age) | 60 | 30 | 240 |
Belt stacking (Space Age)
With Space Age, stack inserters can place up to 4 items on top of each other on a belt (after the research), which quadruples a belt's throughput without making it faster. Only stack inserters can stack items; ordinary inserters and mining drills put single items on the belt, but every inserter can take stacked items off.
How many machines a belt feeds
- Furnaces: a yellow belt of ore feeds 24 steel or electric furnaces. See smelting ratios.
- Mining drills: an electric mining drill mines 0.5 ore per second, so 30 drills fill a yellow belt (more with mining productivity research).
- Green circuits: a full yellow belt of green circuits takes 3 copper cable assemblers for every 2 circuit assemblers; see the circuit blueprints for full-belt builds.
Underground belts and splitters
Underground belts and splitters have the same speed as the belt of the same colour. An underground belt can pass under 4 tiles (yellow), 6 (red), 8 (blue) or 10 (turbo) between its two ends, and splitters can prioritise one side or filter one item, which is how most belt balancers and sushi belts are built.
Belt blueprints for every tier: browse all blueprints.