Anagram Count Calculator
Distinct anagrams of letters with repeated-letter correction.
Other Tools
Dice odds, lottery math, dates of note, and everything else.
Bingo Win Chance Calculator
Turn your card count and total cards in play into win percent and fair odds.
Birthday Paradox Calculator
Shared birthday odds for any group size, exact math.
Birthstone Calculator
Birthstone, alternate stones, and hardness from birth month.
Blood Donation Date Calculator
Next eligible donation date, status, and yearly frequency from last date and type.
Blood Donation Eligibility Calculator
Donate now or wait days from donor rules.
Chinese Zodiac Calculator
Animal and element for any birth year on the 12 year cycle.
Coin Flip Odds Calculator
Exact heads odds for any flip count and target.
Day Length Calculator
Daylight hours, night hours, and solar declination from latitude and date.
Day of Week Calculator
Weekday, weekend verdict, and quarter for any calendar date.
Dice Odds Calculator
Exact average, range, and hit chance for any dice pool.
Earth Overshoot Day Calculator
Overshoot date and Earths from footprint math.
EIN Check Calculator
EIN format and prefix plausibility screen.
Election Date Calculator
Federal vote date and race type by year.
Emergency Water Storage Calculator
Water gallons, jug count, and swap schedule for emergencies.
Evacuation Bus Calculator
Turn evacuee count and bus seats into buses, seats, and empty seats.
Federal Holidays Calculator
All 11 US federal holidays for any year 1971 to 2100.
Fire Drill Time Calculator
Turn floors, rooms, and seconds per room into sweep seconds and minutes.
First Aid Kit Calculator
Size first aid kits for a group with kit count, bandages, and gauze pads.
Food Bank Meals Calculator
Turn donation dollars into meals, family days fed, and month share.
Friday 13th Calculator
Every Friday the 13th in any year 1900 to 2100.
Generation Calculator
Your generation from birth year, with span and name origin.
IBAN Check Calculator
IBAN mod 97 check with country and spaced format.
ISBN Check Digit Calculator
ISBN-13 check digit and full number.
Jury Duty Pay Calculator
Turn service days, daily court rate, and parking into jury pay and combined total.
Leap Year Calculator
Check any year for leap status, February days, and next leap year.
License Plate Combinations Calculator
Plate supply from letter and digit positions minus reserved series.
Lottery Odds Calculator
Exact jackpot odds for any pick-from-pool lottery with bonus ball.
Meteor Shower Calendar
Next meteor shower peak with ZHR from any date.
Moon Phase Calculator
Moon phase name, age, and illumination for any date.
Morse Code Converter
Text to ITU Morse and back, with signal units and send time.
Morse Timing Calculator
Dit, dah, and word gap from WPM.
NATO Phonetic Alphabet Converter
Spell names and codes with Alfa, Bravo, Charlie, and the full list.
Passport Expiry Calculator
Add 10 or 5 years to a passport issue date and get a 6 month renewal reminder.
Plasma Donation Date Calculator
Next plasma date for Source or AB Elite programs.
Poker Outs Calculator
Exact poker draw odds from outs, for the turn and both streets.
Poll Worker Shifts Calculator
Turn workers, shifts each, and sites into total shifts and hours.
Raffle Odds Calculator
Raffle win percent and 1-in-N odds, single or multi-prize.
Secret Santa Odds Calculator
Secret Santa valid draws and odds from player count, with derangement math.
UPC Check Digit Calculator
UPC-A check digit and full code.
VIN Check Digit Calculator
VIN 9th digit proof with verdict.
Volunteer Hours Calculator
Add up personal and team volunteer hours and convert the team total to full days.
Voting Wait Time Calculator
Turn voters in line, minutes each, and machines into wait for the last voter.
Zodiac Sign Calculator
Western star sign, Chinese animal, and element from birth date.