Converting metric units

The medication order may prescribe medication in a metric unit that is different from the metric unit of the medication delivered by the pharmacy. Before calculating the proper dose for the patient, you need to use like metric units therefore, you might need to convert metric units. 

Converting Metric Units to Apothecaries System Units... 

To convert other units into kinematic viscosity in English units v (sq ft per sec) or in Metric units u (centistokes), use the chart or the formulas to the right ... 

To add, subtract, multiply or divide different metric units, first convert all the units to the same denomination. For example, to subtract 54 mg from 0.28 g, solve as 280 mg - 54 mg = 226 mg. 

The equations presented in this chapter are intended to provide a simple tool for preliminary assessment of hazards. As such, most of the techniques are conservative. The units in this chapter are metric and have not been converted to English units because most equations used in fire modeling are based on metric units. The following sources provide more detailed information ... 

Table 4-2 shows how some of the basic metric units are related to units commonly used in English-speaking countries for nonscientitle measurements. Although the United States, Great Britain, and Canada have officially resolved to convert to the metric system, it will be many years before the conversion is complete. In the meantime, you must learn to convert from one system to the other. The three conversion factors given in Table 4-2 (rounded off to 2.54... 

You might have learned this form in a previous class. Of course, either form of our conversion factor can be used. However, if you have ever had trouble converting between metric units, you might want to stick with the first version. Learn the prefix multipliers and their numerical meanings. Then, when you write a conversion factor expression, make sure one side gets the letter and the other side gets the number. 

In the United States, measurements made with metric units were not legally accepted in commerce until 1866. In 1875 the United States became a signatory to the Metric Convention, and by 1890 it received copies of the International Prototype meter and kilogram. However, rather than converting our measurement system to metric, in 1893 Congress decided that the International Prototype units... 

In the literature, information is found using different systems of units metric, SI, and the English system. Quotations from the literature are presented in their original form. It would be difficult to change all these units in the book to one system. To assist the reader in converting these units, an appendix is provided with conversion factors for all units found in the text. 

Older units in the metric system and the avoirdupois system are still widely used in the literature, and the information supplied in this appendix is given for convenience in converting these units, Table A-4. 

Biochemistry employs a decade system of units based on the metric system. Thus, biochemists use units such as the mole or the liter and various subdivisions that differ by three orders of magnitude (Table 1-1). With knowledge of the molecular weight of a particular molecule and equation 1-1, a given mass of a molecule can be converted to units of moles ... 

To convert a value expressed in a primary metric unit to its equivalent in a subunit, or vice versa, use a conversion factor with a 1 in front of the subunit and the equivalent value in front of the main unit. Note that either the prefix abbreviation or its equivalent is in front of the symbol for the primary unit ... 

How important are conversions from one unit to another If you ask the National Aeronautics and Space Administration (NASA), very important In 1999 NASA lost a 125 million Mars Climate Or-biter because of a failure to convert from English to metric units. 

Converting between English and metric units Miccroarray see Gene chips and microarrays... 

This problem was solved using UniSim Design. The first step is to convert the volumetric flow rate into a mass flow rate in metric units. We can set up a stream that has a 50 50 mixture by weight of n-hexane and methyl pentane. This stream has a density of 641 kg/m at 40°C, so the required flow rate is... 

Converting from one metric unit to another metric unit is performed by following these steps ... 

Patients use the apothecaries system to measure medication when they self-medicate however, the medication may be delivered in metric units. Therefore, the healthcare provider must convert the prescribed dose from metric units to units of the apothecaries system. Use factors in Table 7.3 to convert values. The most common conversions are milliliters to teaspoons, tablespoons, or cups. A cup is measured in ounces. Another common conversion is pounds to kilograms. 

A1 As an example, 800 cu in/oz, if converted to the metric unit (at an identical specific load of 0.149 g cm ), equals 436.81 kg, and is expressed in this form according to EN 12130 (1998). Psychologically, the larger cubic inch measurement is automatically identified with better quality. In addition, the easy to read, comma-free three digit cubic inch figure (in most cases displayed only in 10 or even 50 unit steps, which is easier yet to read and to conceive) is historically older. It is most likely to remain in friendly co-existence with metric units. 

Converts given metric unit to metric base unit... 

Converts metric base unit to desired metric unit... 

English units are still common in some countries, while people in other countries (and the scientific community everywhere), use metric units almost exclusively. Unit analysis provides a convenient method for converting between English and metric units. Several of the most commonly needed English-metric conversion factors are listed in Table 8.1 on the next page. Because the English inch is defined as 2.54 cm, the number 2.54 in this value is exact. The numbers in the other conversion factors in Table 8.1 are not exact. 

Converts metric mass unit to English mass unit... 

When converting from one metric unit to another, convert from the given unit to the base unit and then from the base unit to the unit that you want. 

The conversion factor 2.54 cm/in. can be used to convert from an English to a metric unit of length. 

It is often necessary to convert one metric unit to another. Suppose you needed to convert 4.5 cm into the equivalent length in millimeters. A conversion factor is used to do this. Conversion factor statements always have the form ... 

The same prefixes are used with mass as with distance, and they have the same meanings. That is one facet that makes the metric system so easy. In the English system, the subdivisions of a yard are a foot—one-third of a yard—and an inch—one-thirty-sixth of a yard. The subdivision of an Avoirdupois pound is an ounce, one-sixteenth of a pound. The subdivision of a Troy pound is an ounce, one-twelfth of that pound. (Gold and silver are measured in Troy ounces.) Each type of measurement has a different subdivision, and none is a multiple of 10. The metric system uses the same prefixes for all types of measurements, they are all multiples of 10, and they always mean the same thing. The symbols for the units and prefixes are easier to learn than those for the English system units. For example, pound is abbreviated lb and ounce is oz, whereas the metric prefixes are almost always closely related to their names. It is easier to convert metric measurements because the prefixes mean some multiple of 10 times the fundamental unit. 

We can use dimensional analysis to convert a measurement from one metric unit to another. We recognize that by definition 1 dollar = 100 cents, and also that 1 cent = 0.01 dollar. We can use a factor corresponding to either of those equalities. Note that cent is related to centi-, the metric prefix for 0.01. We can simply substitute... 

We have tried to present the data in SI units in most of the book. A large number of parts are, however, still specified in English units. In such cases, conversion factors have been listed in footnotes to allow the reader to convert to metric units. 

BS 5295 was first published in 1976 its room classification standards were strictly comparable to those of FS 209B except for approximations needed to convert imperial units (FS 209B) to metric units (BS 5295). 

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