Introduction - Mathematics and Statistics for the Environment - page 10

TABLE 1.3 (continued)
Conversion Factors by Unit Category

Factor Metric (SI) or English Conversions

1 kg (kilogram) 1000 g (grams)

2.205 lb (pounds)

1 lbs (pound) 453.59 g (grams)

16 oz. (ounces)
Units of Time

1 day 24 hr (hours)

1440 min (minutes)
86,400 sec (seconds)
0.143 weeks
2.738 × 10 -3 yr (years)

1 hr (hours) 0.0417 days

60 min (minutes)
3600 sec (seconds)
5.95 × 10 -3 yr (years)

1 hr (hour) 0.0417 days

60 min (minutes)
3600 sec (seconds)
5.95 × 10 -3 weeks
1.14 × 10 -4 yrs (years)

1 min (minutes)

6.94 × 10 -4 days
0.0167 hr (hours)
60 sec (seconds)
9.92 × 10 -5 weeks
1.90 × 10 -6 yr (years)

1 week 7 days

168 hr (hours)
10,080 min (minutes)
6.048 × 10 5 sec (seconds)
0.0192 yr (years)

1 yr (year) 365.25 days

8,766 hr (hours)
5.26 × 10 5 min (minutes)
3.16 × 10 7 sec (seconds)
52.18 weeks
Units of the Measure of Temperature

°C (5/9)[(°F) - 32°]

1°C (expressed as an interval) 33.8°F = (9/5)(°F)

1.8°R (degrees Rankine)
1.0 K (degrees Kelvin)

°F Fahrenheit) (9/5)[(°C) + 32°]

1°F (expressed as an interval) 0.556°C = (5/9)°C

1.0°R (degrees Rankine)
0.556 K (degrees Kelvin)
Units of Force

1 dyne 1 × 10 -5 N (newtons)

1 nt (newton)

1 × 10 5 dynes