CONVERSION

TABLE C–1 Conversion Factors—Weights and Measures

Units

Multiplied by the Factor Below Equals

Units

Multiplied by the Factor Below Equals

Units

lb

453.6

g

0.002205

lb

lb

0.4536

kg

2.205

lb

oz

28.35

g

0.035273

oz

kg

1,000

g

0.001

kg

kg

1,000,000

mg

0.000001

kg

g

1,000

mg

0.001

g

g

1,000,000

mcg (or g)

0.001

mg

g

109

ng (nanogram)

10-9

g

g

1012

pg (picogram)

10-12

g

mg

1,000

mcg (or g)

0.001

mg

mg/kga

0.0001

%

10,000

mg/kg

ppm

0.0001

%

10,000

ppm

gal (U.S.)

3.785

liters

0.2642

gal(U.S.)

cal

4.184

j (joule)

0.239

cal

kcal

1,000

cal

0.001

kcal

Mcal

1,000,000

cal

0.000001

Mcal

Mcal

1,000

kcal

0.001

Mcal

a 100 ppm = 100 mg/kg = 0.010 percent;
    thus converting 0.0002 percent = 2 ppm = 2 mg/kg.