🐉 Optimization Feat
Great Weapon Master & Sharpshooter Break-Even Calculator
Calculate whether taking the -5 penalty to attack for +10 bonus damage increases or decreases your average expected damage per swing against any AC.
⚙️ Input Parameters
Real-Time Simulation 16
10 25
7
0 15
11
4 30
Mathematical Formula
Expected Damage = P(Hit) * AvgDamage + P(Crit) * CritBonusDamage
Primary Probability Result
--%
Success Probability
Fractional Odds
1 in 2.0
Failure Chance
50.0%
Client-side mathematical calculation ● 100% Deterministic
Tactical Analysis & Mathematical Context
In tabletop gaming, understanding the mathematical distribution behind your rolls allows you to make informed risk-reward decisions. Whether balancing spell slot usage in D&D 5e, evaluating an attack profile in Warhammer 40k, or weighing trade routes in Catan, knowing the exact probability mass function (PMF) turns guesswork into strategy.
Frequently Asked Questions
When should I use Great Weapon Master (-5 / +10)?
As a rule of thumb, use GWM whenever the target AC is 17 or lower (or up to AC 19-20 if you have Advantage). Against heavily armored bosses (AC 21+), the -5 hit penalty reduces your hit chance so severely that regular attacks deal more average damage.
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