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Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum. For K-12 kids, teachers and parents.

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Metric Conversion calculators, tables and formulas for temperature, length, area, volume and weight metric conversions.

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Welcome to Metric Conversion. Temperature, Weight, Length and Area Conversions.

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This online unit conversion tool will help you convert measurement units anytime and solve homework problems quickly using metric conversion tables, SI units, and more.

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ASTM International develops international standards for materials, products, systems and services used in construction, manufacturing and transportation. ASTM standard specifications and test methods define uniform requirements and procedures.