🐉 Survival Math
D&D 5e Death Saving Throw Probability Calculator
Determine the exact odds of dying, stabilizing, or reviving with 1 HP on death saving throws across multiple rounds.
⚙️ Input Parameters
Real-Time Simulation 10
8 15
Mathematical Formula
State-transition Markov chain across 3 successes vs 3 failures
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
What is the baseline probability of surviving death saves unaided?
Without any external healing, assistance, or bonuses, an unconscious character has a 59.5% chance of stabilizing and a 40.5% chance of dying.
What happens when you roll a 20 on a death saving throw?
A natural 20 immediately restores 1 Hit Point, allowing the character to regain consciousness and take turns normally.
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