Poznámky redaktora
(brit gallon) 4,546 l
1 pint 0,473 l
1 quart 0,946 l
1 barrel 158,8 l
Temperature
F (Fahrenheit) (1,8 3°
C (Celsius) 0,5556 (F–32°)
Weight
1 grain 64,8 mg
1 dram 1,77 g
1 (ounce) 28,35 g
1 (pound) 0,4536 Kp
1 stone 6,35 Kp
1 (quarter) 12,7 Kp
1 US-cwt (hundred-
weight) 45,36 Kp
1 ton (short ton) 0,907 t
1 brit. ft. (US gallon) 3,785 l
1 gal. ft. mils 0,5067 mm2
General measuring units
Length
1 mil 0,0254 mm
1 (inch) 25,4 mm
1 (foot) 0,3048 m
1 (yard) 0,9144 m
1 (chain) 20,1 m
1 mile (land mile) 1,609 km
= 1760 yards
1 mile (nautic mile) 1,852 km
1 0,039370 inches
1 39,370079 inches
Area
1 (circ. (cubic foot) 0,0283 m3
1 cu. ton (long ton) 1,016 t
Force
1 4,448 N
1 brit.) 68,95 mbar
= 6,895 10–3
Nmm2
1 lb/sq. ton 9954 N
1 pdl (Poundal) 0,1383 N
1 9,81 N
1 0,102 kp
Velocity
1 mile/h 1,609 km/h
1 Knoten 1,852 km/h
1 ft/s 0,305 m/s
1 ft/min 5,08 10–3
m/s
Energy
1 lb/mile 0,282 kg/m
1 lb/yard 0,496 kg/m
1 lb/foot 1,488 kg/m
Radiation absorbed dose
1 Gray J/kg
1 rad 10–2
J/kg=1CentiGy
= 0,01 Gy
1 Centi 100 Joule
1 rad cJ/kg 0,01Gy
1 Mrad 106
cJ/kg
Pressure
1 psi (lb/sq. therm. 0,0005067 mm2
1 MCM 1000 Circ.1120
Units for cables and wires
In the the measurements are mainly used AWG-numbers (AWG American Wire Gauge). mil) 0,507 10–3
mm2
1 MCM 0,5067 mm2
1 sq. ft. inch (sq. foot) 0,0929 m2
1 square yard 0,836 m2
1 acre 4047 m2
1 square mile 2,59 km2
Density
1 cu. (sq. ft. unit) 1055 Joule
Electrical units
1 ohm/1000 1,0936 ⍀/km
1 ohm/1000 3,28 ⍀/km
1 μF/mile 0,62 μF/km
1 megohm/mile 1,61 M⍀/km
1 μμf/foot 3,28 pF/m
1 decibel/mile 71,5 mN/m
Power rate
1 0,736 kW
1 1,36 PS
1 0,7457 kW
1 1,31 hp
US-AMERICAN AND BRITISH UNITS
Conversion usual measuring units
. 1,489 N/m2
1 33,86 mbar
1 29,89 mbar
1 2,491 mbar
1 N/mm2
= 145 psi
= bar
1 kp/mm2
= 1422 psi
1 736 Torr
= kp/cm2
1 Torr Hg
1 bar 0,1 Pa
1 N/m2
Density
1 lb/cu. ft. section meter resistance
mm2
mm Ohm/km
1000 MCM* 507 25,4 0,035
750 380 22,0 0,047
600 304 19,7 0,059
500 254 20,7 0,07
400 203 18,9 0,09
350 178 17,3 0,10
300 152 16,0 0,12
250 127 14,6 0,14
4/0 107,20 11,68 0,18
3/0 85,00 10,40 0,23
2/0 67,50 9,27 0,29
0 53,40 8,25 0,37
1 42,40 7,35 0,47
2 33,60 6,54 0,57
3 26,70 5,83 0,71
4 21,20 5,19 0,91
5 16,80 4,62 1,12
6 13,30 4,11 1,44
7 10,60 3,67 1,78
8 8,366 3,26 2,36
9 6,63 2,91 2,77
10 5,26 2,59 3,64
11 4,15 2,30 4,44
12 3,30 2,05 5,41
13 2,62 1,83 7,02
4/0 also stated: 0000 mil 0,001 inch 0,0254 mm
* for bigger cross-section the sizes MCM (circular mils)
AWG Cross- Dia- Conductor
No. (cubic inch) 16,39 cm3
1 cu. section meter resistance
mm2
mm Ohm/km
14 2,08 1,63 8,79
15 1,65 1,45 11,20
16 1,31 1,29 14,70
17 1,04 1,15 17,80
18 0,8230 1,0240 23,0
19 0,6530 0,9120 28,3
20 0,5190 0,8120 34,5
21 0,4120 0,7230 44,0
22 0,3250 0,6440 54,8
23 0,2590 0,5730 70,1
24 0,2050 0,5110 89,2
25 0,1630 0,4550 111,0
26 0,1280 0,4050 146,0
27 0,1020 0,3610 176,0
28 0,0804 0,3210 232,0
29 0,0646 0,2860 282,0
30 0,0503 0,2550 350,0
31 0,0400 0,2270 446,0
32 0,0320 0,2020 578,0
33 0,0252 0,1800 710,0
34 0,0200 0,1600 899,0
35 0,0161 0,1430 1125,0
36 0,0123 0,1270 1426,0
37 0,0100 0,1130 1800,0
38 0,00795 0,1010 2255,0
39 0,00632 0,0897 2860,0
1 Circ. inch) 645,16 mm2
1 sq. 16,02 kg/m3
1 lb/cu. 0,478 mbar
1 pdl/sq. 27,68 t/m3
Horse power
1 1,0139 h
= 2,684 106
Joule
= 746 h
1 BTU (brit. (cubic yard) 0,7646 m3
1 gal. in. mil. yd.
The AWG-numbers conform the british B&S-numbers (B&S Brown Sharp)
AWG Cross- Dia- Conductor
No. in
