Manual of Applied Field Hydrogeology

Appendix A: Unit Conversions Tables

Table A.1: Unit Conversions for Length

Unit

Inch

Feet

Yard

Mile

mm

cm

mr

km

1 in.

1

0.08333

0.02777

1.5783e-05

25.40

2.54

0.0254

2.54e-05

1 ft

12

1

3

5280

304.8

30.48

0.3048

3.048e-04

1 yd

36

3

1

5.682e-04

914.4

91.44

0.9144

9.144e-04

1 mile

63,360

5280

1760

1

1.609e06

1.609e05

1609.3

1.609

1 mm

0.03937

3.2808e-03

1.0936e-03

6.2137e-07

1

0.1

0.001

1e-06

1 cm

0.3937

0.03281

1.0936e-02

6.2137e-06

10

1

0.01

1e-05

1 m

39.37

3.2808

1.0936

6.214e-04

1000

100

1

0.001

1 km

39.370

3280.8

1093.6

0.621

1e06

100,000

1000

1

Table A.2: Unit Conversions for Area

Unit

Feet 2

Mile 2

Acre

Meter 2

km 2

Hectare

1 feet 2

1

3.587e-08

2.296e-05

0.09291

9.291e-08

9.291e-06

1 mile 2

2.788e06

1

640

2.59e06

2.59

259

1 acre

43,560

1.5625e-03

1

4047

4.047e-03

0.4047

1 meter 2

10.764

3.861e-07

2.471e-04

1

1e-06

0.0001

1 km 2

1.0764e07

0.3861

247.1

1e06

1

100

Table A.3: Unit Conversions for Volume

Unit

mL

Liters

Meter 3

Feet 3

Gallons

Acre-ft

Million gal.

1 ml

1

0.001

1e-06

3.531e-05

2.6414e-04

8.107e-10

2.6414e-10

1 liter

1000

1

0.001

0.03531

0.2641

8.107e-07

2.641e-07

1 meter 3

1e06

1000

1

35.31

264.14

8.107e-04

2.641e-04

1 feet 3

28,317

28.317

2.8317e-02

1

7.481

2.2957e-05

7.481e-06

1 gallon

3785.9

3.7859

3.786e-03

0.1337

1

3.0691e-06

1e-06

1 acre-ft

1.2335 e09

1.2335 e05

1233.5

43560

3.2583 e05

1

0.32583

1e06 gal

3.7859 e09

3.7859 e06

3786

1.3367 e05

1e06

3.0691

1

Table A.4: Unit Conversions for Time

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