Miscellaneous

  • Air Conditioner BTU Calculator
    Find the right air conditioner BTU for any room. Enter length, width, occupants, and sun exposure to size your AC unit instantly.
  • Zodiac Sign Calculator
    Find your zodiac (star) sign instantly from your birthday. Enter your birth month and day to see your sign, symbol, element and date range.
  • How Many Days Old Am I?
    Find out exactly how many days, weeks, and hours old you are. Enter your birthdate and a reference date to calculate your age in days.
  • Concrete Slab Calculator
    Calculate concrete needed for a slab in cubic yards and cubic feet, plus how many 40, 50, 60 or 80 lb bags to buy. Free estimator.
  • Slope / Grade Calculator
    Calculate slope as a percent grade, angle of incline, slope length and ratio from rise and run. Free, instant grade calculator for any units.
  • Miles Per Gallon (MPG) Calculator
    Free MPG calculator: enter miles driven and gallons used to find your car's miles per gallon fuel economy, plus the L/100 km equivalent.
  • Square Footage Calculator
    Calculate square footage instantly. Enter length and width in feet to get total area in square feet, square yards, and square meters.
  • Liters to Gallons Converter
    Convert liters to gallons instantly. Get both US liquid gallons and UK imperial gallons from any volume in liters, with the exact formula shown.
  • Tip & Bill Split Calculator
    Calculate the tip on your bill and split the total evenly between any number of people. Get tip amount, grand total, and per-person share instantly.
  • Pounds to Kilograms Converter
    Convert pounds (lb) to kilograms (kg) instantly with the exact factor 1 lb = 0.45359237 kg. Free, accurate weight conversion tool.
  • Roman Numeral to Number Calculator
    Convert any Roman numeral to its decimal (Arabic) number instantly. Enter symbols like MCMXCIV and get 1994 with full subtractive-rule support.
  • Number to Roman Numeral Converter
    Convert any whole number from 1 to 3999 into Roman numerals instantly. See the standard symbols (I, V, X, L, C, D, M) and how the conversion works.
  • HEX to RGB Color Converter
    Convert any HEX color code to RGB values instantly. Supports 3- and 6-digit hex with or without #, and shows a live color swatch.
  • Grams to Cups Converter (Flour & Sugar)
    Convert grams to cups for flour, sugar and more. Choose your ingredient and get an instant, accurate cup measurement plus tablespoons.
  • Date Difference Calculator
    Find the number of days, weeks, months and years between two dates. Free date difference calculator showing the exact gap between any start and end date.
  • Yes or No Generator
    Free Yes or No generator that gives a random answer to any question. Set your own odds of "Yes" and let chance decide instantly.
  • Cups to Milliliters Converter
    Convert US cups to milliliters (mL) instantly. Uses the exact factor 1 cup = 236.5882365 mL for accurate cooking and recipe measurements.
  • Ounces to Milliliters Converter
    Convert US fluid ounces to milliliters instantly. 1 fl oz = 29.5735 mL. Free, accurate oz to mL converter for cooking, recipes, and science.
  • Feet to Meters Converter
    Convert feet to meters instantly. Enter any length in feet to get the exact value in meters using the standard factor 1 ft = 0.3048 m.
  • Inches to Centimeters Converter
    Convert inches to centimeters instantly. Enter a length in inches and get the exact cm value using the 1 in = 2.54 cm standard.
  • Gallons to Liters Converter
    Convert gallons to liters instantly. Supports US gallons (3.785411784 L) and UK/Imperial gallons (4.54609 L) with exact conversion factors.
  • Miles to Kilometers Converter
    Convert miles to kilometers instantly. Enter any distance in miles and get the exact kilometer equivalent using the factor 1 mile = 1.609344 km.
  • Kilometers to Miles Converter
    Convert kilometers to miles instantly. Enter any distance in km and get the exact equivalent in miles using miles = km / 1.609344.
  • Words Per Minute (WPM) Calculator
    Calculate your typing speed in words per minute. Enter characters typed, time, and errors to get gross WPM, net WPM, and accuracy instantly.

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