Dice Probability Calculator

• Free online dice probability calculator — no download or installation needed
• Supports 1-50 dice with 2-100 sides, with presets for D4/D6/D8/D10/D12/D20/D100 and target types such as "Equal to", "At least", "At most" and "Between"
• Precisely calculates probability, expected value, variance, standard deviation, odds and the full probability distribution, with one-click copy

1. Open the tool page — no download or installation required (a default result is calculated automatically on load)
2. Pick a preset under "Sides" (D4/D6/D8/D10/D12/D20/D100) or set the number of sides manually (2-100), and set the "Dice Count" (1-50)
3. Choose a "Target Type" (Equal to/At least/At most/Between) and enter the target value or range
4. Click "Calculate" to view the probability, expected value, variance, standard deviation, odds, total outcomes and exact combinations; see the probability of each sum in "Distribution", and click "Copy" to copy the result at once

• This tool is completely free and requires no registration or login
• Everything runs locally in your browser — your data is never uploaded
• Calculation uses dynamic programming for an exact, non-random result; it may take a little longer when the number of dice or sides is very large

Free online dice probability calculator. Supports any number of dice and sides. Quickly calculate probabilities for specific sums or ranges, expected value, variance, and the full probability distribution. Perfect for tabletop games, TRPGs, and probability learning.

Open the tool page — no download or installation required (a default result is calculated automatically on load) Pick a preset under "Sides" (D4/D6/D8/D10/D12/D20/D100) or set the number of sides manually (2-100), and set the "Dice Count" (1-50) Choose a "Target Type" (Equal to/At least/At most/Between) and enter the target value or range Click "Calculate" to view the probability, expected value, variance, standard deviation, odds, total outcomes and exact combinations; see the probability of each sum in "Distribution", and click "Copy" to copy the result at once

This tool is completely free and requires no registration or login Everything runs locally in your browser — your data is never uploaded Calculation uses dynamic programming for an exact, non-random result; it may take a little longer when the number of dice or sides is very large

Yes, Dice Probability Calculator is completely free. No download or installation required — it runs right in your browser.