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  • The Laboratory is a building where you can upgrade your Troops and your Spells. For a single research fee of Elixir or Dark Elixir, or one Hammer of Fighting or Hammer of Spells (which will instantly finish the upgrade), a chosen troop, spell or siege machine’s stats (health, damage, etc.) and cost (not increased for siege machines) will increase by a small amount.
Clash of Clans Laboratory
  • If you decide to upgrade your Laboratory while there is research going on, the laboratory upgrade will continue while the laboratory is upgrading, even though it will appear to have continued where it left off when you started the upgrade. The true progress can be seen by re-logging in back into the game, after the Laboratory upgrade is completed.
    • If the unit upgrade would finish while the Laboratory is upgrading, the upgrade will not be completed until the Laboratory upgrade itself is complete.
  • You cannot cancel the research while it is in progress, but you can immediately complete the upgrade. There are two methods to do so: using Gems, or with the relevant Magic Items (a Book of Fighting for troops, a Book of Spells for spells; a Book of Everything can be used for either).
  • The Laboratories emit a purple (level 1-6), blue (level 7), red (level 8) or yellow (level 9-11) glow from the entrances when upgrading a unit.
  • You do not need an available Builder to upgrade in the Laboratory.
  • Different levels of troops will receive graphical changes. However, when you are upgrading a troop, the laboratory interface doesn’t show what it looks like after the upgrade.
  • When a Laboratory upgrade is completed, it is applied immediately to any relevant troops, spells, or siege machines that are present on the village, wherever they may be (whether it is already ready or is being trained at the time that the upgrade completes). You do not have to create new instances of the upgraded unit to benefit from the upgrade.
    • As a result, due to upgraded units having higher creation costs, you can queue the unit being upgraded in the relevant building just before the upgrade finishes, and then un-queue the unit when the upgrade finishes to gain some resources.
  • The upgrades inside the Laboratory take around the same amount of time as upgrading defenses and other buildings, but because players can only perform one laboratory upgrade at a time as opposed to multiple buildings at a time, these laboratory upgrades appear to take longer overall. Therefore, it is often in the player’s best interest to keep the Laboratory running whenever possible. Certain Magic Items, such as the Book of Fighting or the Research Potion, can also help with laboratory research.
Town Hall Level12345678910
Number Available001111111 1
LevelHitpointsBuild CostBuild TimeExperience GainedTown Hall Level Required
125025,00030 minutes423
227050,0005 hours1344
328090,00012 hours2075
4290270,0001 day2936
5310500,0002 days4157
63301,000,0004 days5878
73502,500,0005 days6579
83504,000,0006 days72010

The following charts lists the level of the laboratory on the top and the unit/spell you can upgrade on the left. Each cell contains the level of the unit/spell you can train, how much it costs in elixir, and how long it takes. For example Laboratory level 4 allows you to train a level 3 giant for 250,000 elixir and it takes 2 days. The top chart contains Elixir troop upgrades while the bottom chart contains Dark Elixir upgrades. Certain troops are not able to be upgraded at certain laboratory levels and are represented by ‘ – ‘s. Elixir

Upgrade ChartLaboratory Level
Level 1Level 2Level 3Level 4Level 5Level 6Level 7Level 8
Time6 hours1 day3 days5 days10 days
Time12 hours2 days3 days5 days14 days
Time12 hours2 days3 days5 days
Time1 day2 days3 days5 days10 days
Wall BreakerLevel23456
Time1 day2 days3 days5 days10 days
Time1 day2 days3 days5 days10 days
Time1 day2 days3 days5 days14 days
Time3 days5 days7 days 
Time7 days10 days12 days
Cost3,000,000 / 6,000,0008,000,000
Time10 days / 12 days14 days
Lightning SpellLevel23456
Time1 day2 days3 days4 days14 days
Healing SpellLevel23456
Time1 day2 days3 days5 days7 days
Rage SpellLevel2345
Time2 days3 days5 days7 days
Jump SpellLevel2
Time5 days
Freeze SpellLevel2 / 3 / 4
Cost4,000,000 / 6,000,000 / 8,000,000
Time5 / 10 / 14 days

Dark Elixir

Upgrade ChartLaboratory Level
Level 5Level 6Level 7Level 8
Time5 Days6 Days7 Days10 Days
Hog RiderLevel2345
Time8 Days10 Days12 Days14 Days
Time10 Days12 Days14 Days
Time10 Days12 Days14 Days14 Days
Time10 Days

Clash of Clans Buildings

Defensive BuildingsCannonArcher TowerMortarAir DefenseWizard TowerAir SweeperHidden TeslaX-BowInferno TowerEagle ArtilleryWallsTraps
Resource BuildingsTown HallGold MineElixir CollectorDark Elixir DrillGold StorageElixir StorageDark Elixir StorageBuilder's HutClan Castle (Treasury)
Army BuildingsArmy CampBarracksDark BarracksLaboratorySpell FactoryDark Spell FactoryBarbarian King AltarArcher Queen AltarGrand Warden Altar
Other BuildingsDecorationsObstaclesLoot Cart

This article is licensed under the Creative Commons Attribution-ShareAlike License. It uses material from the Laboratory article.