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Measurement reference

English and metric conversion chart

Use a one-page, thirty-eight-row reference for nineteen non-nautical pairs in both directions, with exact factors distinguished from rounded factors.

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Multiply by the shown exact or approximate factor. Liquid units use U.S. customary definitions.

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Learning objective

What this activity builds

Select the correct directional factor for an English, U.S. customary or metric conversion.

Worked example

Which factor converts miles per hour to kilometers per hour?

Multiply by exactly 1.609344

The international mile is exactly 1.609344 kilometers, and the hour is unchanged.

Teaching notes

Make the practice count

  • Read the From and To columns before choosing a factor.
  • An equals sign marks a complete exact decimal; an approximately-equal sign marks a rounded display.
  • Use the reciprocal panel when reversing direction.

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Math SheetEnglish and metric conversion chartMultiply by the shown exact or approximate factor. Liquid units use U.S. customary definitions.English / U.S. customary to metricFromToMultiply byincm=2.54ftm=0.3048ydm=0.9144mikm=1.609344in²cm²=6.4516ft²m²=0.09290304yd²m²=0.83612736in³mL=16.387064ft³m³≈0.02831684659yd³m³≈0.7645548580US fl ozmL≈29.57352956US tspmL≈4.928921594US tbspmL≈14.78676478US cupL=0.2365882365US qtL=0.946352946US galL=3.785411784ozg≈28.34952313lbkg=0.45359237mphkm/h=1.609344Metric to English / U.S. customaryFromToMultiply bycmin≈0.3937007874mft≈3.280839895myd≈1.093613298kmmi≈0.6213711922cm²in²≈0.1550003100m²ft²≈10.76391042m²yd²≈1.195990046mLin³≈0.06102374409m³ft³≈35.31466672m³yd³≈1.307950619mLUS fl oz≈0.03381402270mLUS tsp≈0.2028841362mLUS tbsp≈0.06762804540LUS cup≈4.226752838LUS qt≈1.056688209LUS gal≈0.2641720524goz≈0.03527396195kglb≈2.204622622km/hmph≈0.6213711922= exact decimal≈rounded to at most 10 significant digitsLiquid factors use U.S. customary definitions; oz means avoirdupois mass ounce.Symbols: in inch; ft foot; yd yard; mi mile; cm centimeter; m meter; km kilometer.US liquid: fl oz fluid ounce; tsp teaspoon; tbsp tablespoon; cup; qt quart; gal gallon.mL milliliter; L liter; oz mass ounce; lb pound; g gram; kg kilogram.² square; ³ cubic; mph miles/hour; km/h kilometers/hour.Math Sheet • Page 1

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