Latest posts
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Electricity Cost Calculator
Enter an appliance’s wattage, daily hours and your electricity rate to see what it costs per day, month and year.
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Ring Size Calculator
Measure a ring’s inside diameter or your finger’s circumference in millimetres and get the closest US, UK/AU and EU ring sizes.
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Chronological Age Calculator
Work out exact chronological age at any assessment date — years;months;days, the format used in speech, education and psychological testing.
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Final Grade Calculator
Enter your current grade, your target, and the final exam’s weight to see exactly what score you need on the final.
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Text Case Converter
Paste text and convert it instantly between UPPERCASE, lowercase, Title Case and Sentence case — entirely in your browser.
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Aquarium Calculator
Enter a tank’s length, width and height to get its volume in US gallons and litres — plus the filled weight your stand must hold.
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Days Until Calculator
Pick any future date and get the exact countdown — days, weeks-and-days, the weekday it falls on, and the working days in between.
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Dice Roller
Roll up to 100 virtual dice with 4 to 100 sides — see every individual roll, the total, the possible range and the statistical average.
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Temperature Converter
Convert any temperature between Celsius, Fahrenheit and Kelvin at once — with the formulas shown and absolute zero respected.
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Fraction to Decimal Calculator
Enter any numerator and denominator to convert the fraction to a decimal and a percentage — division done exactly, with the method shown.