Dice Probabilities Calculator

Build mixed dice pools, set a target, get exact probabilities instantly. The essential calculator for board gamers and game designers.

Build any dice pool. Get instant probabilities. Make smarter decisions at the table.

Dice Probabilities is a fast, elegant calculator for board gamers and game designers. Mix and match dice types — 2d6, 1d10, 3d8, whatever your game needs — set a target number, and instantly see the exact probability of hitting it.

FEATURES

• Mixed dice pools: combine d4, d6, d8, d10, d12, and d20 in any combination
• Three comparison modes: Exactly, At Least, or At Most your target
• Instant results with percentage, simplified fraction, and plain-English description
• Save your favourite dice pools to the library for quick access
• Clean visual display with animated probability chart
• Light and dark mode support
• No ads. No account required. No internet needed.

PERFECT FOR

• Board gamers settling odds debates mid-game
• RPG players weighing risky rolls
• Game designers balancing mechanics
• Maths students exploring probability
• Anyone who's ever wondered "what are my chances?"

The probability engine uses exact convolution — no simulation, no approximation. Every result is mathematically precise.