Latest posts
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Hex Calculator
Convert between hexadecimal, decimal, binary and octal.
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HELOC Calculator
Estimate the payment and interest on a home equity line of credit.
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Height Converter
Convert height between centimetres and feet and inches, in both directions.
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Heat Index Calculator
Enter temperature and humidity to get the heat index — how hot it actually feels.
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Healthy Weight Calculator
Find a healthy weight range for your height, plus ideal-weight formula estimates.
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Half-Life Calculator
Find how much of a substance remains after a given time, based on its half-life.
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Greatest Common Factor Calculator
Find the greatest common factor (GCF) of two or more numbers.
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Gravel Calculator
Work out exactly how much gravel you need in cubic yards, cubic feet and tons — for driveways, paths and drainage.
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Grass Seed Calculator
Enter your lawn size and grass type to get the pounds of seed you need — for a new lawn or overseeding.
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Grade Calculator
Enter each assignment’s score and weight to get your weighted course grade and letter.