10-Sided Dice Roller
Roll d10 dice online with customizable count, modifiers, keep highest/lowest, and exploding dice. Perfect for RPGs, percentile rolls, and probability games.
Free Dice & Random Calculators
16 toolsDice rollers, coin flippers, lottery, and random number generators. Browse our free dice & random tools below — no sign-up required.
2 Dice Roller
Roll two dice online with adjustable sides, modifiers, drop highest/lowest, and target checks. Full sum distribution and doubles tracking included.
4-Sided Dice Roller
Roll d4 dice online with modifiers, keep highest/lowest, reroll 1s, and preset configurations. Track face frequency and review full roll history.
6-Sided Dice Roller
Roll d6 dice online with presets for 1d6–8d6, modifiers, keep highest/lowest, reroll 1s, and full face distribution charts. Perfect for board games and RPGs.
Coin Flip Streak Calculator
Simulate coin flips and analyze streaks. Find the longest heads/tails run, streak distributions, and compare observed results to mathematical expectations.
Coin Flipper
Flip a coin up to 10,000 times with adjustable bias. Track heads/tails counts, streaks, z-scores, running percentages, and alternation rates.
Custom Dice Roller
Roll any dice configuration from d2 to d1000 with modifiers, keep modes, exploding dice, and minimum face values. Full statistical analysis and frequency charts.
D&D Dice Roller
Dungeons & Dragons dice roller with advantage/disadvantage, attack vs AC, damage combos, critical hit detection, and full D&D DC/dice reference tables.
d100 Dice Roller
Roll d100 (percentile) dice online with standard or two-d10 percentile mode. Includes success threshold checks, critical hits/fails, and decile distribution.
d20 Dice Roller
Roll d20 dice with advantage/disadvantage, modifiers, DC checks, natural 20/1 tracking, and face frequency analysis. The essential D&D dice roller.
Dice Average Calculator
Calculate expected averages, min/max, and standard deviation for any dice expression. Supports drop lowest, reroll, exploding dice, and modifiers.
Dice Calculator
Multi-group dice calculator supporting mixed dice types (d4+d6+d20), modifiers, take highest/lowest, and batch rolls. Build any dice expression for RPGs.
Dice Roller Calculator
Roll any number of dice with any sides online. Full roll history, sum distribution, face frequency analysis, and sorting options. The classic virtual dice roller.
Lottery Calculator
Calculate lottery odds, expected value, and prize probabilities for any lottery format. Generate random numbers and compare Powerball, Mega Millions, EuroMillions odds.
Random Dice Roller
Roll completely randomized dice — random count, random type, optional random modifier. Great for surprise encounters, writing prompts, and dice warm-ups.
Roulette Payout Calculator
Calculate roulette payouts, house edge, win probabilities, and expected value for every bet type. Simulate spins and compare American vs European wheels.