Fun & Curiosities Calculators
Snow day odds, dog years, server RAM: the calculators you didn't know you needed, built with the same care as the serious ones.
Magic: The Gathering 3
Games & Gaming 5
- Loot Drop CalculatorAny drop rate into odds within N tries, and the cost of certainty.
- Pokémon Damage CalculatorThe real damage formula, floors and all, from min to max roll.
- Minecraft Server RAM CalculatorVanilla or kitchen-sink modpack: find your server's real RAM number.
- Dice RollerRoll up to 10 dice, d4 through d20, with totals and session history.
- Random Number GeneratorPick random numbers in any range, with or without repeats.
Sports & Odds 7
- NFL Win Probability CalculatorPoint spread in, outright win probability out, with the vig stripped away.
- NBA Win Probability CalculatorTurn an NBA spread or moneyline into an honest chance of winning outright.
- WNBA Win Probability CalculatorSpread or moneyline in, win probability out, with the sigma assumption said out loud.
- NHL Win Probability CalculatorMoneylines to fair win odds, or Poisson goals math with overtime handled honestly.
- Soccer Win Probability CalculatorElo-based win-draw-loss odds for any two national teams. Settle the argument.
- Penalty Shootout SimulatorTake the shootout: aim, dive, and watch live win probability shift.
- Odds CalculatorConvert American, decimal, and fractional odds, and see the vig hiding in the price.
Curiosities 6
- Snow Day CalculatorThe odds school closes tomorrow. For fun, hope, and homework avoidance.
- Dog Years CalculatorYour dog's real human age. Spoiler: it's not age times 7.
- Airspeed Velocity of an Unladen SwallowThe real physics behind the Monty Python question. About 24 mph. African or European?
- Space Travel Time CalculatorThe Moon, Mars, or Proxima at any speed, and the 1 g flip and burn, honestly.
- Road Trip CalculatorGoogle's ETA assumes you never stop. Your crew disagrees. Get the real arrival time.
- Money Goal CalculatorWhat $1,000,000 actually takes per day, per week, and per working hour.
More tools 4
- Bigger Boat CalculatorHow big a boat you need for a great white, drawn to scale. Brody was right, and here is by how much.
- Lottery Jackpot CalculatorLump sum or annuity? Taxed, invested, and decided honestly.
- Party Alcohol CalculatorA real shopping list for a party: cases, bottles and kegs, rounded up on purpose.
- Tree Age CalculatorA tree's age from its trunk, across 71 species and three tables that disagree.
What is in here
- Games and odds. loot drop chance, the MTG opening hand calculator with exact hypergeometric odds, Pokemon damage, and the Minecraft server RAM calculator.
- Randomness, honestly. dice roller and random number generator.
- Sport. soccer win probability and the penalty shootout simulator, which is built on real penalty research.
- Curiosities. snow day odds, dog years done properly rather than by multiplying by seven, and the airspeed velocity of an unladen swallow.
Built with the same care as the serious ones
These are the calculators you did not know you needed, and they are not sloppy because they are fun. The MTG opening hand calculator uses exact hypergeometric probability and reproduces every published landmark, including the famous 39.95 percent chance of drawing at least one of a four-card playset in an opening seven. The loot drop calculator explains why the expected number of attempts gives you only a 63.6 percent chance of success rather than a certainty. The dog years calculator uses the actual non-linear relationship rather than the multiply-by-seven folklore.
The AI energy calculator cites Epoch AI, the EIA, and published research for every figure, and states honestly that per-query energy estimates are genuinely debated.
Nothing is ever due
The most useful thing in this whole category is a correction to how people think about randomness. A 2 percent drop rate does not become more likely because you have failed fifty times. The random number generator has no memory of your afternoon and owes you nothing. Half of players get the drop within 35 attempts, and about one in 2.7 walk away with nothing after fifty, and both of those facts are consequences of the same arithmetic.
Certainty is also expensive in a way that surprises people: getting from a 90 percent chance to a 99 percent chance costs about as many additional attempts as getting from zero to 90 did, because each attempt removes a fraction of the remaining failure rather than a fixed amount.
Frequently asked questions
Are the game calculators actually accurate?
Yes, and they are tested against published landmarks. The MTG opening hand calculator uses exact hypergeometric probability and reproduces the known figures, including 39.95 percent for at least one of a four-card playset in an opening seven and the 52.77 percent on-the-play turn-four number. Where a calculation depends on a game's own mechanics we state the assumption on the page.
If a drop rate is 2 percent, am I guaranteed it in 50 tries?
No. At a 2 percent rate, fifty attempts gives you about a 63.6 percent chance, not a certainty. You would need 114 attempts for 90 percent and 228 for 99 percent. Nothing is ever due: previous failures do not improve your odds on the next attempt, because each one is independent.
Is the multiply-by-seven dog years rule wrong?
Yes, though it is a reasonable rough guide in the middle of a dog's life. Dogs mature very quickly in their first two years and then age more slowly, and the relationship also varies with breed size. Our dog years calculator uses the non-linear relationship rather than the folklore multiplier.
Is the random number generator genuinely random?
It uses your browser's built-in random number generator, which is fine for games, picking names, and settling arguments. It is not cryptographically secure and should not be used for anything where the outcome needs to resist a determined attacker, such as generating passwords or keys.