Clash of Clans Upgrade & Gem Calculator
*Effective time assumes all builders work simultaneously on this specific queue.
How the Clash of Clans Progress Calculator Works
In Clash of Clans, managing your builders efficiently is the key to progressing through Town Hall levels. This calculator helps you determine two critical things: how much real-world time a series of upgrades will take based on your available builder workforce, and how many Gems you would need to finish an upgrade instantly.
Calculating Effective Builder Time
If you have a total of 10 days worth of upgrades and you have 5 builders, your "Effective Time" is 2 days—assuming you keep all builders busy without any downtime. The formula is simple: Total Upgrade Time / Number of Builders. This tool helps you plan your shield duration and resource gathering cycles.
The Gem Cost Formula
Supercell uses a specific logarithmic scale for gemming upgrades. While the exact numbers vary slightly with game updates, the standard calculation follows these benchmarks:
- 1 Minute: ~1 Gem
- 1 Hour: ~20 Gems
- 24 Hours (1 Day): ~260 Gems
- 7 Days (1 Week): ~1,000 Gems
Example Calculation
Suppose you are upgrading your X-Bow to Level 4, which takes 7 days.
- Total Time: 7 Days, 0 Hours.
- If you have 1 Builder: Real time is 7 days.
- Gem Cost: Approximately 1,000 Gems to finish instantly.
- Resource Planning: By knowing the end time, you can ensure your Gold/Elixir storages are full exactly when the builder becomes free.
Maximizing Progress with the 6th Builder
Unlocking the 6th builder (B.O.B/O.T.T.O) from the Builder Base is the single most significant progress boost in the game. It increases your build speed by 20% compared to having 5 builders. Use this calculator to see how much faster your base will be "maxed" once you unlock that final builder.