Games and Puzzles Calculators
Free games and puzzles calculators — Scrabble word scorer, cipher tools, dice probability, and more fun math tools.
Bingo Number Caller / Generator
Generate random Bingo calls with the classic B-I-N-G-O column format. Perfect for hosting Bingo nights at home, school, or community events.
Craps Probability Calculator
Calculate exact probabilities for every craps bet. See odds, house edge, and expected value for pass line, don't pass, come, field, and proposition bets.
Keno Odds Calculator
Calculate exact probabilities and payouts for Keno based on how many numbers you pick and how many you match. See expected value for any Keno game.
ROT13 Encoder / Decoder
Encode or decode text using ROT13, the simple letter substitution cipher that shifts each letter 13 positions. Commonly used online for spoiler text.
Roulette Probability Calculator
Calculate exact odds and expected value for every roulette bet type. Compare American (38 slots) vs European (37 slots) wheel probabilities.
Scrabble Word Score Calculator
Calculate the exact score for any Scrabble word including double/triple letter and word score squares. Perfect for checking scores or learning tile values.
Vigenere Cipher Encoder / Decoder
Encode or decode text using the Vigenere cipher with any keyword. A polyalphabetic substitution cipher stronger than Caesar cipher.