Delta-calc
by ByteBurrow
Delta-calc adds a live damage calculator to Cobblemon battles on the Fabric loader, shown inside the battle screen itself.
What it does
The calculator reads battle information the client already holds during each turn and estimates damage from the game's species records, move records, type chart and the current battle state, including stat stages, HP, weather, terrain and side conditions. Where the opponent's exact spread, item or unrevealed moves are unknown, the mod infers a likely set from revealed moves and ranked usage, and it presents every result as a guess, not a settled figure.
Players can override the inferred set by hand and cycle through alternative calculations with the mouse. An optional export sends the battle state to external analysis tools. The mod is client-side only, so only the player needs it, and it changes nothing in Cobblemon's core mechanics.
Delta-calc is released under the Apache License 2.0, so its source code is open source. It is published for Fabric only, with files for 1.21.1 – 1.21.11, and its latest Fabric file is 3.2.0 for 1.21.11.
Key features
Live damage calculator
A panel updates as turns progress, showing damage estimates for both moves and both Pokemon from the current battle state.
Opponent set inference
Unrevealed sets are estimated from revealed moves, items, abilities and ranked usage data, and the estimate tightens as the battle goes on.
Manual overrides
Players can set the opponent's EV spread or moves by hand and cycle through alternative calculations in the summary.
Battle info overlays
Overlays show weather, terrain, side conditions and stat boosts alongside the battle, with team indicators and richer tooltips.
Optional battle-state export
The battle state can be exported in a structured form for use with external analysis tools.
Gallery
Compatibility
Latest build for each game version and loader.
1.21.x11 of 11 versions with builds
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Cobblemon Battle Conditions is a Fabric mod for 1.21.1 that is open source under the MIT License and runs on client and server. Cobblemon: Team Preview is open source under the Mozilla Public License 2.0, supports Fabric and NeoForge for 1.21.1, and runs on both sides as well. Delta-calc is a client-side only mod, so players install it alone and servers need nothing.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Delta-calc | Fabric | 1.21.1 – 1.21.11 | Client-side only | 2026-09-07 |
| Cobblemon Battle Conditions | Fabric | 1.21.1 | Client and server | 2025-12-02 |
| Cobblemon: Team Preview | Fabric and NeoForge | 1.21.1 | Client and server | 2026-10-11 |
Questions
Does Delta-calc need to be installed on the server?
Does Delta-calc change how Cobblemon battles work?
Are the damage numbers exact?
In the catalog
Delta-calc is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 19,862 mods support Minecraft 1.21.11.
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What the author says
DeltaCalc is a client-side utility mod for Cobblemon Delta on Fabric 1.21.1. It adds an in-battle damage calculator, expanded battle overlays, richer tooltips, team indicators, and optional battle-state export for external analysis tools. The goal is to make battle information easier to read and act on without…
Official listing
- Modrinth page
- modrinth.com/mod/delta-calc
- Owner
- ByteBurrow
- Published
- 2026-04-15
- Updated on Modrinth
- 2026-09-07
- Facts verified
- 2026-10-15