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Attack Speed is the value used to determine whether or not a unit within combat will perform a double attack against its opposing foe. It uses the SPD stat for calculation, of which the equation varies throughout the series. This statistic is not listed in the user interface, but is calculated at the onset of battle, taking into consideration the SPD rating of both parties. For more on the speed statistic, see Speed (stat).

## Description Edit

In combat, each participating unit has their own Attack Speed (AS) value. Should one of the unit's AS exceed the other's AS by a certain threshold value, then the unit with the greater AS may perform a double attack. This threshold value may vary between games. Additionally, there are various factors (e.g., weapon weight, skills) that influence a unit's AS; these factors may vary between games as well.

## Calculations Edit

### Fire Emblem: Shadow Dragon and the Blade of Light Edit

When a unit's AS value is greater than the other's by ≥1 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Wt)
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
```

### Fire Emblem Gaiden Edit

When a unit's AS value is greater than the other's by ≥1 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Wt)
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
```

### Fire Emblem: Mystery of the Emblem Edit

When a unit's AS value is greater than the other's by ≥3 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Wt)
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
```

### Fire Emblem: Genealogy of the Holy War Edit

In order for a unit to perform a double attack in this game, they must possess the Pursuit skill and have an AS value greater than the other's by ≥1 point. Otherwise, the unit will only perform single-action attacks.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Wt)
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
```

### Fire Emblem: Thracia 776 Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined based on their equipped weapon.

If the user attacks with a physical weapon:

```AS = (Speed) - (Burden)
Burden = (Wt) - (Con); negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Con = value of the given unit's constitution
```

If the user attacks with a magic-based weapon:

```AS = (Speed) - (Wt)
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
```

### Fire Emblem: The Binding Blade Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Burden)
Burden = (Wt) - (Con); negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Con = value of the given unit's constitution
```

### Fire Emblem: The Blazing Blade Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Burden)
Burden = (Wt) - (Con); negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Con = value of the given unit's constitution
```

### Fire Emblem: The Sacred Stones Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Burden)
Burden = (Wt) - (Con); negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Con = value of the given unit's constitution
```

### Fire Emblem: Path of Radiance Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Burden)
Burden = (Wt) - (Str); negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Str = value of the given unit's strength
```

### Fire Emblem: Radiant Dawn Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Burden)
Burden = (Wt) - (Str); negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Str = value of the given unit's strength
```

### Fire Emblem: Shadow Dragon Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Burden)
Burden = (Wt) - (Str); negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Str = value of the given unit's strength
```

### Fire Emblem: New Mystery of the Emblem Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed)
Speed = value of the given unit's speed
```

### Fire Emblem Awakening Edit

When a unit's AS value is greater than the other's by ≥5 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed)
Speed = value of the given unit's speed
```

### Fire Emblem Fates Edit

When a unit's AS value is greater than the other's by ≥5 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) + (Effects from skills) + (Effects from weapons)
Speed = value of the given unit's speed
```

Various skills and weapons provide effects that modify attack speed exclusively, although their in-game descriptions may seem to suggest that they modify the user's speed stat. Any descriptions regarding "effective speed" or "eff. speed" are referring to attack speed.

### Fire Emblem: Three Houses Edit

When a unit's AS value is greater than the other's by ≥4 point, then they will perform a double attack.
The AS value for a given unit is determined by the formula shown below.

```AS = (Speed) - (Burden)
Burden = (Wt) - [(Str)/5]; negative Burden values are set to 0
Speed = value of the given unit's speed
Wt = value of unit's equipped weapon's weight
Str = value of the given unit's strength
```

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