Miscellaneous

  • D'Hondt Method Seat Allocation Calculator
    Allocate legislative seats among parties in proportion to votes using the D'Hondt (highest-averages / Jefferson) method. Universal apportionment tool.
  • Peoria Golf Handicap Calculator
    Calculate a one-day golf competition handicap with the Peoria, Double (New) Peoria, or New-New Peoria hidden-hole method. Assumes course par 72, 80% allowance.
  • How Many Generations Ago an Era Was
    Estimate how many generations ago a historical era was. Japanese-period presets auto-fill start/end years; divides years elapsed by years per generation.
  • Islamic Prayer Times Weekly Calculator
    Compute Fajr, Sunrise, Dhuhr, Asr, Maghrib, Isha and Islamic midnight for any location and date range, plus the Qibla direction, using the praytimes.org algorithm.
  • Ancient Roman Length Converter
    Convert ancient Roman lengths (Roman mile, passus, Roman foot) into modern statute miles, feet, and meters using the standard 1479 m per Roman mile.
  • Yard, Feet, Inch to Meter Converter
    Convert length between metric (meters, centimeters) and imperial yard-pound units (yards, feet, inches) both ways. Exact universal conversion factors.
  • Pounds & Ounces to Kilograms/Grams Converter
    Convert weight between metric (kg/g) and avoirdupois pounds and ounces in either direction. Exact 1 lb = 0.45359237 kg. Free, universal mass converter.
  • Gregorian Date to Maya Calendar Converter
    Convert any Gregorian or Julian date into the Maya Tzolkin, Haab and Long Count calendars, plus the Julian Day Number, using the GMT correlation constant.
  • Maya Long Count to Gregorian/Julian Date Calculator
    Convert a Maya Long Count date (Baktun.Katun.Tun.Winal.Kin) to a Gregorian and Julian calendar date, Julian Day Number, plus Tzolkin and Haab positions.
  • Snap Score Calculator
    Estimate how fast your Snapchat score grows. Enter daily snaps sent, received and stories posted to project your future Snap Score over any number of days.
  • Hijri to Gregorian Date Converter
    Convert Hijri (Islamic lunar) dates to the Gregorian calendar using the tabular method. Supports Standard, Kuwaiti and Fatimid leap-year rules over a chosen period.
  • Taxi Fare Split Calculator (Per-Leg, Japan)
    Split a shared taxi fare fairly when riders are dropped off one by one. Each leg is divided among remaining passengers, rounded up to the nearest 10 yen (Japan).
  • Bacon Curing Calculator
    Calculate the salt, Prague Powder #1 (cure #1) and sugar needed to dry-cure bacon for any pork belly weight, based on safe industry percentages.
  • Beer Pong Calculator
    Estimate how much beer you need for beer pong. Enter cups per table, beer per cup, number of tables and games to get total ounces, cans and gallons.
  • Pizza Party Calculator
    Find out how many pizzas to order for your party. Enter guests, slices per person, and slices per pizza to get the exact number of pizzas needed.
  • Cake Pricing Calculator
    Free cake pricing calculator for bakers. Add ingredient cost, labor, overhead and profit markup to find the right price to charge for any cake.
  • Tea Brewing Calculator
    Calculate how many grams of tea leaves to use for any amount of water. Set your preferred strength per 100 ml for the perfect cup or pot every time.
  • Julian–Gregorian Calendar Date Conversion Calculator
    Convert any date between the proleptic Julian and Gregorian calendars via the Julian Day Number. Supports AD/CE and BC/BCE eras with exact integer math.
  • Sunglasses Size Calculator
    Calculate sunglasses frame width from lens, bridge and temple measurements, then check the fit against your face width in millimeters.
  • Easter Date and Related Movable Feasts Calculator
    Calculate the date of Easter Sunday for any year 1583-4099: Western (Gregorian) and Eastern (Orthodox) Easter plus Lent, Pentecost and other movable feasts.
  • Bathroom Mirror Size Calculator
    Find the ideal bathroom mirror width and height for your vanity. Enter counter width, side gaps and wall height to get proportional mirror dimensions in inches.
  • Sock Size Calculator
    Convert your US shoe size to the right sock size. Enter men's or women's shoe size to get the matching small/medium/large sock range.
  • House Cleaning Cost Calculator
    Estimate house cleaning cost by area, hours, or number of rooms. Add a base fee and per-bedroom/bathroom rates to get a fast maid-service price quote.
  • Tipsy Drink Amount Calculator
    Estimate how much of a drink (by ABV and your body weight) to reach and hold a pleasant tipsy buzz for N hours. Novelty estimate only — not a legal/medical limit.

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