Miscellaneous

  • Paint Calculator — Gallons Needed for a Room
    Estimate how many gallons of paint you need for a room. Enter dimensions, doors, windows, coats and coverage to get a fast, accurate paint estimate.
  • Optimal Megapixels for Print Paper Size Calculator
    Find how many camera megapixels you need to print any paper size cleanly at 200, 300 and 400 dpi. Supports L, 2L, A and JIS B photo paper sizes.
  • Drake Equation for Love Calculator
    Use the Drake Equation for love to estimate how many potential partners exist in your city. Enter population and percentages to find your dating odds.
  • Percentage of Year Calculator
    Find what percentage of the year has passed for any date. Enter a month, day, and year to see year progress instantly—perfect for planning and tracking goals.
  • Beer Goggles Effect Calculator
    Calculate the novelty "beer goggles" effect score from the 2005 University of Manchester formula using alcohol, distance, smokiness, lighting and eyesight. For fun only.
  • Pokémon GO Weight Loss Calculator
    Estimate calories burned and fat lost while walking and hatching eggs in Pokémon GO using your weight, distance, speed, and MET value.
  • 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.
  • Tree Benefits Calculator
    Estimate the annual CO₂ sequestered by your trees. Enter the number of trees and CO₂ absorbed per tree to see total carbon captured per year.
  • Christmas Tree Footprint Calculator
    Compare the carbon footprint of a real vs artificial Christmas tree. Estimate annual kg CO₂e based on disposal method and years of reuse.
  • Cigarette Butts Cleanup Calculator
    Estimate how many cigarette butts are discarded over time and need cleanup, plus their waste weight and potential water contamination impact.
  • Cryptocurrency Footprint Calculator
    Estimate the CO₂ carbon footprint of cryptocurrency transactions from transaction count, energy per transaction, and your grid emission factor.
  • Hand Drying Footprint Calculator
    Estimate the annual CO₂ footprint of drying your hands with paper towels versus an electric air dryer. Compare methods and see kg CO₂ per year.
  • Vegan Footprint Calculator
    Calculate how much CO2 you save by eating vegan. Enter days vegan and daily diet emissions to see your carbon footprint reduction in kg CO2e.
  • Reduce Your Plastic Calculator
    Estimate how much single-use plastic you save per year by avoiding items each week. Enter items avoided and weight to see your annual plastic reduction.
  • COVID-19 Mask Waste Calculator
    Estimate the total disposable mask waste in kilograms from masks per day, number of days, people, and mask weight. Free, universal waste calculator.
  • Harry Potter Currency Calculator
    Convert wizarding money between Galleons, Sickles, and Knuts. 17 Sickles = 1 Galleon, 29 Knuts = 1 Sickle. Get the total value instantly.
  • Money Weight Calculator
    Calculate how much a pile of cash weighs. Enter the total amount, the denomination, and the weight per note or coin to get total weight in g, kg and lb.
  • Add or Subtract Days Calculator
    Add or subtract any number of days from a date. Get the exact resulting calendar date and day of the week using precise Julian Day Number math.
  • Cross Exchange Rate Calculator
    Compute a cross exchange rate (A/C) from two known rates. Multiply A/B by B/C, or divide A/B by C/B. Universal currency cross-rate tool.
  • Steak Cook Time Calculator
    Estimate how long to cook a steak per side based on its thickness and your desired doneness, from rare to well done. Get per-side and total grill times.
  • Rice to Water Ratio Calculator
    Calculate the exact amount of water for cooking rice. Choose white, brown, basmati, jasmine, or a custom ratio to get perfect fluffy rice every time.
  • How Much Mashed Potatoes Per Person Calculator
    Find out how much mashed potatoes to make per person. Enter your guest count and appetite level to get pounds, ounces, and kilograms of raw potatoes.
  • Ham Cooking Time Calculator
    Calculate how long to cook a ham by weight. Enter pounds and minutes per pound (e.g. 18 min/lb at 325°F for fully cooked bone-in) for total oven time.
  • Wedding Alcohol Calculator
    Estimate how much beer, wine and spirits to buy for your wedding based on guest count, reception length and your drink mix. Free planning tool.

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