Clash of Clans Upgrade Cost Calculator
Add gem cost per upgrade level to get total gems to max a building or troop. UK spelling.
Upgrade gem cost
Enter the gem cost to speed up each upgrade level (you can find this in-game by tapping the gem finish button). The calculator sums them for a total gem cost to max that building or troop.
Source: In-game gem finish costs per level. Clash of Clans (Supercell).
Frequently Asked Questions
How many gems to max a building in Clash of Clans?
It depends on the building and level. Use the in-game speed-up cost per level and add them up, or use a guide. This calculator lets you add custom gem costs per level to get a total.
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