All Calculators
Explore our full directory of free online calculators. We are constantly expanding our collection to cover more topics including health, math, finance, and engineering. Select a tool below to get started.
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Concrete Calculator
Estimate cubic yards and bags for slabs.
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Age Calculator
Calculate exact age from date of birth.
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Percentage Change
Calculate % increase or decrease.
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Time Difference
Calculate hours between two times.
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BMI Calculator
Body Mass Index calculator.
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Pipe Weight
Calculate weight of pipes & tubes.