The Miscellaneous category collects handy calculators that don't fit a single subject — everyday tools for percentages, dates, networking, reading, and fun facts. Popular picks include the Vote Percentage Calculator, Book Page Calculator, Percentage of Year Calculator, CIDR Calculator, and Chronological Age Calculator.
Whatever quick answer you need, browse the most-used tools below or check the Trending tab. Every calculator is free, works on any device, and shows the method behind the result.
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Height Converter: cm to Inches and FeetConvert a height in centimeters to inches, decimal feet, and feet-and-inches with a fraction you choose (1/8, 1/16, etc.). Exact 1 in = 2.54 cm.
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Slot Machine RTP CalculatorCalculate how many wallpaper rolls you need for a room. Enter wall size, roll dimensions and pattern repeat to get rolls, strips and strips per roll.
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Ring Size CalculatorInput finger circumference (mm), choose US, UK, or EU, and get your ring size instantly for a comfortable, accurate fit.
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Day of the Week CalculatorFind out what day of the week any date falls on using Zeller's congruence. Enter year, month and day to get the weekday instantly.
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Lakhs & Crores to Million / Billion ConverterConvert lakhs and crores to millions and billions instantly. 1 lakh = 0.1 million, 1 crore = 10 million. See the figure in plain numbers too.
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Rug Size CalculatorFree rug size calculator. Enter your room dimensions and desired floor border to get the ideal rug length, width, and area in feet.
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Air Conditioner BTU CalculatorFind the right air conditioner BTU for any room. Enter length, width, occupants, and sun exposure to size your AC unit instantly.
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Zodiac Sign CalculatorFind your zodiac (star) sign instantly from your birthday. Enter your birth month and day to see your sign, symbol, element and date range.
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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.
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Concrete Slab CalculatorCalculate 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.
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Slope / Grade CalculatorCalculate slope as a percent grade, angle of incline, slope length and ratio from rise and run. Free, instant grade calculator for any units.
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Miles Per Gallon (MPG) CalculatorFree MPG calculator: enter miles driven and gallons used to find your car's miles per gallon fuel economy, plus the L/100 km equivalent.
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Square Footage CalculatorCalculate square footage instantly. Enter length and width in feet to get total area in square feet, square yards, and square meters.
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Liters to Gallons ConverterConvert liters to gallons instantly. Get both US liquid gallons and UK imperial gallons from any volume in liters, with the exact formula shown.
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Tip & Bill Split CalculatorCalculate 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.
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Pounds to Kilograms ConverterConvert pounds (lb) to kilograms (kg) instantly with the exact factor 1 lb = 0.45359237 kg. Free, accurate weight conversion tool.
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Roman Numeral to Number CalculatorConvert any Roman numeral to its decimal (Arabic) number instantly. Enter symbols like MCMXCIV and get 1994 with full subtractive-rule support.
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Number to Roman Numeral ConverterConvert 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.
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HEX to RGB Color ConverterConvert any HEX color code to RGB values instantly. Supports 3- and 6-digit hex with or without #, and shows a live color swatch.
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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.
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Date Difference CalculatorFind 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.
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Yes or No GeneratorFree Yes or No generator that gives a random answer to any question. Set your own odds of "Yes" and let chance decide instantly.
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Cups to Milliliters ConverterConvert US cups to milliliters (mL) instantly. Uses the exact factor 1 cup = 236.5882365 mL for accurate cooking and recipe measurements.
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Ounces to Milliliters ConverterConvert US fluid ounces to milliliters instantly. 1 fl oz = 29.5735 mL. Free, accurate oz to mL converter for cooking, recipes, and science.
Frequently asked questions
What kinds of calculators are in the Miscellaneous category?
It's a mix of general-purpose tools that span several topics — voting and percentage math, dates and ages, networking (like CIDR/subnet), reading time and book pages, and a few for-fun calculators such as zodiac compatibility. If a tool doesn't belong to one clear subject, you'll usually find it here.
Are these calculators free to use?
Yes. Every calculator here is free, needs no sign-up, and works on desktop and mobile.
How do I find the right tool quickly?
Use the popularity-ordered list on this page, open the Trending tab to see what's rising this week, or type your keyword into the site search for an exact match.
How accurate are the results?
Each tool uses a standard, well-defined formula and is tested against reference values. Results are meant for everyday reference; for anything critical, double-check with an authoritative source.
Do you save what I type in?
No. Calculations run in your browser and your inputs are never logged, stored, or shared.
