Unit Conversion Tables

Lengths – Conversions

Abbreviations

Å:

Angstrom

ft:

foot

yd:

yard

in:

inch

ly:

lightyear

pc:

parsec

Conversion units

1 km = 10³ m

1 dm = 10^–1 m

1 cm = 10^–2 m

1 mm = 10^–3 m

1 µm = 10^–6 m

1 nm = 10^–9 m

1 Å = 10^–10 m

1 pm = 10^–12 m

1 fm = 10^–15 m

[m]

[cm]

[in]

[ft]

[yd]

[mile]

1 m

1

100

39.3701

3.280 84

1.093 61

6.213 71 • 10^–4

1 cm

10^–2

1

0.393 701

0.032 808

0.010 936

6.2137 • 10^–6

1 in

2.54 • 10^–2

2.54

1

1/12

1/36

1.5783 • 10^–5

1 ft

0.3048

30.48

12

1

1/3

1.893 94 • 10^–4

1 yd

0.9144

91.44

36

3

1

5.681 82 • 10^–4

1 mile

1609.34

160 934

63 360

5280

1760

1

1 mile

= 1.609 34 km

1 ly

= 9.4607 • 10¹⁵ m

1 pc

= 3.0857 • 10¹⁶ m

Area – Conversions

Abbreviations

a:

are

ha:

hectare

ft:

feet

in:

inch

yd:

yard

Conversion units

1 a (are) = 10 m • 10 m = 100 m²

1 ha (hectare) = 100 a = 100 m • 100 m = 10⁴ m² = 10^–2 km²

[m²]

[in²]

[ft²]

[yd²]

[mile²]

1 m²

1

1550.003

10.763 910

1.195 990

3.861 • 10^–7

1 in²

6.4516 • 10^–4

1

9/1296

1/1296

2.491 • 10^–10

1 ft²

9.290 304 • 10^–2

1296/9

1

1/9

3.857 • 10^–8

1 yd²

8.361 2736 • 10^–1

1296

9

1

3.2283 • 10^–7

1 mile²

2.589 988 110 336 • 10⁶

4.014 • 10⁹

2.788 • 10⁷

3.098 • 10⁶

1

1 acre = 4840 yd² = 43 560 ft² = 32 Khata = 4.047 m²

1 barn = 10^–28 m²

1 tetrad = 2 km • 2 km

1 hectad = 10 km • 10 km

1 myriad = 100 km • 100 km

1 Bigha = 20 Khata = 400 Dhur = 8000 Dhurki

1 yd² = 2.066 1157 • 10^–4 acres = 3.228 305 79 • 10^–7 miles² = 0.0000 8.361 2736 • 10^–7 hectares

Volume – Conversions

Abbreviations

am.:

american

brit.:

british

liq.:

liquid

oz.:

ounce

Conversion units

1 l = 10^–3 m³ = 1 dm³ = 10³ cm³ = 10⁶ mm³

1 ml = 1 cm³;

1 ul = 10^–6 l;

1 nl = 10^–9 l;

[l]

[gallon] (US)

[pint] (UK)

[1 am. liq oz.]

[1 brit. liq oz.]

[m³]

1 l

1

0.264 172

2.113 38

33.814

0.879 877

10^–3

1 gallon (US)

3.785 41

1

6.661 39

128

133.228

3.785 41 • 10^–3

1pint (UK)

0.568 261

0.150 119

1

19.2152

20

0.568 261

1 am. liq. oz.

2.957 35 • 10^–2

7.8125 • 10^–3

5.204 21 • 10^–2

1

1.040 84

2.9574 • 10^–5

1 brit. liq. oz.

2.841 131 • 10^–2

7.505 94 • 10^–3

5 • 10^–2

0.96076

1

2.8413 • 10^–5

1 m³

10³

0.264 172

1.759 75

33.814

35.1951

1

1 gallon (US)

= 3.785 411 784 l

= 3.785 411 784 • 10^–3 m³

1 pint (UK)

= 0.568 261 25 l

= 0.568 261 285 249 35 • 10^–3 m³

1 American liquid ounce

= 0.029 573 529 6875 l

1 British liquid ounce

= 0.028 413 062 5 l

Speed – Conversions

1 Knot (kn)

= 1.852 km/h

= 0.5144 m/s

1 m/s

= 3.6 km/h

Mass

[g]

[pound]

[ounce]

[stone]

1 g (gram)

1

2.204 62 • 10^–3

3.5274 • 10^–2

1.574 73 • 10^–4

1 pound

453.592

1

16

7.142 86 • 10^–2

1 ounce

28.3495

6.25 • 10^–2

1

4.464 29 • 10^–3

1 stone

6350.29

14

224

1

1 pound

= 0.453 592 37 kg

= 453.592 37 g

1 ct (carat)

= 2 • 10^–4 kg

= 200 mg

Energy – Conversions

[J]

[cal]

[Wh]

[eV]

[Ha]

1 J

1

0.239 006

2.777 78 • 10^–4

6.242 • 10¹⁸

4.359 744 650 • 10^–18

1 cal

4.184

1

1.162 22 • 10^–3

2.611 • 10¹⁹

9.597 • 10¹⁷

1 Wh

3600

0.860 421

1

2.247 • 10²²

8.257 • 10²⁰

1 eV

1.6022 • 10¹⁹

3.8293 • 10^–20

4.4505 • 10^–23

1

3.674 93 • 10^–2

1 Ha

4.359 744 650 • 10^–18

1.042 • 10^–18

1.211 • 10^–21

27.2114

1

1 cal

= 4.1868 J

1 kWh

= 3.6 • 10⁶ J

1 eV

= 1.602 176 487 • 10^–19 J

Energy – Conversions for physical chemistry

[J]

[kJ/mol]

[kcal/mol]

[Ha]

[eV]

[cm^–1]

[Hz]

[K]

1 J

1

6.022 140 857 • 10²³

1.439 • 10²⁴

2.293 712 317  • 10¹⁷

6.241 509 126 • 10¹⁸

5.034 116 651 • 10²²

1.509 190 205 • 10³³

7.242 973 100 • 10²²

1 kJ/mol

1.660 539 040 • 10^–24

1

2.390 • 10^–1

3.808 798 848 • 10^–4

1.036 426 958 • 10^–2

8.359 347 233 • 10¹

2.506 069 254 • 10¹²

1.202 723 949 • 10²

1 kcal/mol

6.948 • 10^–25

4.184

1

1.594 • 10^–3

4.336 • 10^–2

3.498 • 10²

1.049 • 10¹³

5.032 • 10²

1 Ha

4.359 744 650 • 10^–18

2.625 499 639 • 10³

6.275 • 10²

1

2.7211386020• 10¹

2.194 746 314 • 10⁵

6.579 683 921 • 10¹⁵

3.157 751 300 • 10⁵

1 eV

1.602 176 621 • 10^–19

9.648 533 288 • 10¹

2.306 • 10¹

3.674 932 248 • 10^–2

1

8.065 544 005 • 10³

2.417 989 262 • 10¹⁴

1.160 452 210 • 10⁴

1 cm^–1

1.986 445 824 • 10^–23

1.196 265 656 • 10^–2

2.859 • 10^–3

4.556 335 253 • 10^–6

1.2398419739• 10^–4

1

2.997 924 580 • 10⁶

1.438 777 360 • 10^–4

1 Hz

6.626 070 040 • 10^–34

3.990 312 711 • 10^–13

9.537 • 10^–14

1.519 829 846 • 10^–16

4.1356676629• 10^–15

3.335 640 952 • 10^–7

1

4.799 244 700 • 10^–11

1 K

1.380 648 520  • 10^–23

8.314 459 861 • 10^–3

1.987 • 10^–3

3.166 810 509 • 10^–6

8.6173303078• 10^–5

6.950 345 674 • 10³

2.083 661 206 • 10¹⁰

1

Power

1 PS

= 75 kp • m/s

= 735.498 75 W

Pressure

1 bar

= 10⁵ Pa

= 10⁵ N/m²

1 atm

= 101 325 Pa

= 1.013 25 bar

1 Torr

= 1/760 atm = 1.333 mbar = 1 mm Hg

Temperature

Transform from:

°C to K

K to °C

°C to °F

°F to °C

Angles

2π rad

= 360°

= 6400 mil

200 gon

= 180°

= π rad

Dosimetry

1 R (Röntgen)

= 2.58 • 10^–4 C/kg

1rd (Rad)

= 0.01 Gy

1 Ci (Curie)

= 3.7 • 10¹⁰ Bq

1 rem

= 0.01 Sv (Sievert)

Luminance

1 stilb

= 1 cd/cm²

Magnetic field

1 M (Maxwell)

= 10^–8 V•s

1 Oe (Oersted)

=

1 G (Gauss)

= 10^–4 T

Roman numbers

I                  1

XI                  13

LXX           70

DCCC         800

II                2

XIV                14

LXXX        80

CM             900

III               3

XV                 15

XC              90

CMX          910

IV               4

XVI                16

C                100

M                1000

V                5

XVII              17

CII              102

MDLV        1555

VI               6

XVIII             18

CC              200

MM            2000

VII              7

XIX                19

CCC           300

                 5000

VIII            8

XX                 20

CD              400

                 10000

IX               9

XXX              30

D                500

                 50000

X                10

XL                 40

DL              550

                 100000

XI               11

L                    50

DC              600

                500000

XII              12

LX                 60

DCC           700

                1000000

Data Sizes

1 bit holds either the value 0 or 1

1 Byte (B) = 8 bits

Unit

corresponds to

in bytes (B)

in bytes (B)

in bits

1 Kilobyte (KB)

1’024 bytes

2¹⁰

1’024

8 · 2¹⁰

1 Megabyte (MB)

1’024 kilobytes

2²⁰

1’048’576

8 · 2²⁰

1 Gigabyte (GB)

1’024 megabytes

2³⁰

1’073’741’824

8 · 2³⁰

1 Terrabyte (TB)

1’024 gigabytes

2⁴⁰

1’099’511’627’776

8 · 2⁴⁰

1 Petabyte (PB)

1’024 terrabytes

2⁵⁰

1’125’899’906’842’624

8 · 2⁵⁰

1 Exabyte (EB)

1’024 petabytes

2⁶⁰

1’152’921’504’606’846’976

8 · 2⁶⁰

1 Zettabyte (ZB)

1’024 exabytes

2⁷⁰

1’180’591’620’717’411’303’424

8 · 2⁷⁰

1 Yottabyte (YB)

1’024 zettabytes

2⁸⁰

1’208’925’819’614’629’174’706’176

8 · 2⁸⁰