Castle Upgrade Calculator
Select your current and target castle level to see the exact resources you need and any building prerequisites along the way. Brilliance milestones — including the important +5 Hero Level unlocks at Castle 50 and Castle 60 — are highlighted inline.
Castle Upgrade Calculator
Total resources and building requirements for any castle level range (21–65).
| Resource | Total Needed |
|---|---|
| ● Primary Material(levels 21–40) | 162.4M |
| ● Secondary Material(levels 29–40) | 34.0M |
Building Prerequisites
- Guild (25)
- Training Ground (25)
- Research Cottage (26)
- Hospital (26)
- Guild (27)
- Training Ground (27)
- Research Cottage (28)
- Hospital (28)
- Guild (29)
- Training Ground (29)
- Research Cottage (30)
- Hospital (30)
- Guild (31)
- Training Ground (31)
- Research Cottage (32)
- Hospital (32)
- Guild (33)
- Training Ground (33)
- Research Cottage (34)
- Hospital (34)
Data verified from infographic (2026-02-26). Levels 41–65 are for new servers (108+). Resource names for levels 41–65 are approximate — exact icons unconfirmed.
Notes on the data:
- Levels 21–40 use the NEW Version 2025 resource structure (two resource columns).
- Levels 41–65 are for new servers (108+) and use a different four-resource structure. The “Premium Resource” column for levels 41+ shows small counts (e.g. 126–388) likely representing Dragon Essence or a similar scarce currency.
- Resource column names are inferred from icon context — exact in-game names are unconfirmed for levels 41+.
Data verified from community infographic, 2026-02-26.
Fan-made guide. Not affiliated with River Game HK Limited. Game data may be inaccurate.