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Lab

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Lab.png
Lab

Recipe

Time icon.png
2
+
Electronic circuit.png
10
+
Iron gear wheel.png
10
+
Transport belt.png
4
Lab.png
1

Total raw

Time icon.png
21.5
+
Copper plate.png
15
+
Iron plate.png
36

Recipe

Time icon.png
2
+
Electronic circuit.png
10
+
Iron gear wheel.png
10
+
Transport belt.png
4
Lab.png
1

Total raw

Time icon.png
39
+
Copper plate.png
50
+
Iron plate.png
70

Health

150

Stack size

10

Dimensions

3×3

Energy consumption

60 kW (electric)

Module slots

2 slots

Internal name

lab

Prototype type

lab

Required technologies

None required

Produced by

Hand icon.png
Assembling machine 2.png
Assembling machine 3.png
Science packs put into the front lab will be passed to labs behind it.

Labs are buildings that perform research for technologies by consuming science packs. Use of a lab is required to progress in Factorio.

When productivity modules are used in labs, the productivity bonus is directly calculated and applied each tick so the productivity bar is simply cosmetic. This means that it does not matter that the productivity bar resets when the research is changed, no productivity bonus is lost. [1]

The player can only research one technology at a time, but can use multiple labs for faster results. The speed bonus of labs when lab research speed is researched and modules are present can be calculated using this formula: research_bonus × module_bonus = speed_bonus; the percentage bonuses have to be converted to decimals (e.g. +140% = 2.4) before the formula is used.

Production requirements

Calculating the number of science packs needed per second is straightforward:

  • ERS = 1 + B[r] ÷ 100
  • ACT = T[r] ÷ ERS
  • PPS = N ÷ ACT

Where:

  • ERS is "effective lab research speed"
  • B[r] is the Lab Research Speed bonus as reported by the game, in percent (including any module effects)
  • ACT is "adjusted cycle time"
  • T[r] is the research cycle time as displayed in the research screen
  • PPS is "packs per second"
  • N is the number of labs available.

Thus, for a 10-lab setup, researching Nuclear Power (30 second cycle time) with Lab Research Speed 4 (140% bonus), the calculation is:

  • ELRS = 1 + (140 ÷ 100) = 2.4
  • ACT = 30 ÷ 2.4 = 12.5 s
  • PPS = 10 ÷ 12.5 = 0.8

This means 0.8 science packs per second, of each type, would need to be produced to continuously supply the labs.

Equation simplification

Assuming all labs have the same B[r] (which they always will unless they are affected by different module configurations), the above calculations can be combined into one equation:

  • PPS = N × (1 + [B[r] ÷ 100]) ÷ T[r]

Thus for the numerical example:

  • PPS = 10 × (1 + [140 ÷ 100]) ÷ 30 = (10 ÷ 30) × (1 + 1.4) = (1 ÷ 3) × 2.4 = 2.4 ÷ 3 = 0.8 packs per second

History

  • 0.12.6:
    • The research speed of a lab is now not dependent on its electricity consumption, and can be scripted.
  • 0.12.0:
    • Lab research is now continuous; Science packs now have progress bars.
  • 0.9.2:
    • Labs are now named after early access backers when built from blueprints.
  • 0.7.2:
    • Changed the recipe of Lab to require 4 transport belts, down from 5.
  • 0.2.7:
    • Contents of the Lab is now shown in the entity info.

See also