diff --git a/sim/battle-actions.ts b/sim/battle-actions.ts
index 9df9dceb52..5a16ebbc97 100644
--- a/sim/battle-actions.ts
+++ b/sim/battle-actions.ts
@@ -180,7 +180,7 @@ export class BattleActions {
 		}
 		const allActive = this.battle.getAllActive(true);
 		this.battle.speedSort(allActive);
-		this.battle.speedOrder = allActive.map(a => a.side.n * a.battle.sides.length + a.position);
+		this.battle.speedOrder = allActive.map(a => a.getFieldPositionValue());
 		this.battle.fieldEvent('SwitchIn', switchersIn);
 
 		for (const poke of switchersIn) {
diff --git a/sim/battle.ts b/sim/battle.ts
index f06c223980..81617c5bb6 100644
--- a/sim/battle.ts
+++ b/sim/battle.ts
@@ -1009,8 +1009,7 @@ export class Battle {
 				// Pokemon speeds including ties are resolved before all onSwitchIn handlers and aren't re-sorted in-between
 				// so we subtract a fractional speed from each Pokemon's respective event handlers by using the index of their
 				// unique field position in a pre-sorted-by-speed array
-				const fieldPositionValue = pokemon.side.n * this.sides.length + pokemon.position;
-				handler.speed -= this.speedOrder.indexOf(fieldPositionValue) / (this.activePerHalf * 2);
+				handler.speed -= this.speedOrder.indexOf(pokemon.getFieldPositionValue()) / (this.activePerHalf * 2);
 			}
 		}
 		return handler;
diff --git a/sim/pokemon.ts b/sim/pokemon.ts
index 6ff69ec153..cda757180f 100644
--- a/sim/pokemon.ts
+++ b/sim/pokemon.ts
@@ -518,6 +518,11 @@ export class Pokemon {
 		return (this.side.id + positionLetter) as PokemonSlot;
 	}
 
+	getFieldPositionValue() {
+		// p1a, p2a, p3a, ..., p1b, p2b, p3b, ...
+		return this.side.n + this.battle.sides.length * this.position;
+	}
+
 	toString() {
 		const fullname = (this.illusion) ? this.illusion.fullname : this.fullname;
 		return this.isActive ? this.getSlot() + fullname.slice(2) : fullname;