Metric Conversion Card


In the 1970s, after metric units of measure had been adopted in Canada and Great Britain, some people in the United States advocated adoption of the metric system. The National Bureau of Standards of the U. S. Department of Commerce prepared this white plastic reference card to assist those wishing to use the unfamiliar units of measure. One side gave approximate conversion factors for computing metric measures from customary measures of length, area, mass and volume. This side also has a scale eight centimeters long divided to millimeters, and a chart with temperatures in degrees Fahrenheit along the top and temperatures in degrees centigrade along the bottom.

The other side of the card gives factors for converting from metric to common measures of length, area, mass, volume, and temperature. There also is a scale three inches long divided to 1/16th of an inch.

The card was a gift of machinist George A. Norton, a longtime employee of the National Museum of American History.

Date Made: 1972

Maker: U.S. Department of Commerce, National Bureau of Standards

Location: Currently not on view

Place Made: United States: District of Columbia, Washington

Subject: Mathematics


See more items in: Medicine and Science: Mathematics, Mathematical Charts and Tables, Metric System, Science & Mathematics, Measuring & Mapping


Exhibition Location:

Credit Line: Gift of George A. Norton III

Data Source: National Museum of American History

Id Number: 1990.3231.02Catalog Number: 1990.3231.02Nonaccession Number: 1990.3231

Object Name: mathematical table

Physical Description: plastic (overall material)Measurements: overall: .1 cm x 6.2 cm x 9.2 cm; 1/32 in x 2 7/16 in x 3 5/8 in


Record Id: nmah_1213740

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