Charts and Tables

Ohm's law

V=IxR where V is in volts
where I is in amps
where R is in ohms

 
P=VxI where P is in watts
where V is in volts
where I is in amps

 

Resistors

 

Resistors in series

 
Resistors in parallel

 

Capacitors

Capacitors in series

 
Capacitors in parallel

 

Inductors

Inductors in series

 
Inductors in parallel

 

Typical conversions

  • Millimetres/Inch    25.4
  • Centimetres/Foot    30.48
  • Metres/Yard    0.914
  • Kilometres/Mile    1.609
  • Grams/Ounce    28.35
  • Kilograms/Pound    0.454
  • Litres/Pint    0.567
  • Litres/Gallon    4.54
  • Litres/Cubic Foot    28.32
  • Watts/Horsepower    746
  • Coulombs/Amp Hour    3600

 

Wire data

Diameter
mm
Area mm² AWG number Copper Resistance at
20°C ohms/km
0.04 0.0013 46 13700
0.05 0.0020 44 8750
0.06 0.0028 42 6070
0.07 0.0039 41 4460
0.08 0.0050 40 3420
0.09 0.0064 39 2700
0.10 0.0078 38 2190
0.11 0.0095 37 1810
0.12 0.011   1520
0.13 0.013 36 1300
0.14 0.015 35 1120
0.15 0.018   970
0.16 0.020 34 844
0.17 0.023   757
0.18 0.026 33 676
0.19 0.028   605
0.20 0.031 32 547
0.25 0.049 30 351
0.30 0.071 29 243
0.35 0.096 27 178
0.40 0.13 26 137
0.45 0.16 25 108
0.50 0.20 24 87.5
0.55 0.24   72.3
0.60 0.28   60.7
0.65 0.33 22 51.7
0.70 0.39   44.6
0.75 0.44   38.9
0.80 0.50 20 34.1
0.85 0.57   30.2
0.90 0.64 19 26.9
0.95 0.71   24.3
1.00 0.78 18 21.9
1.10 0.95   18.1
1.20 1.10   15.2
1.30 1.30 16 13.0
1.40 1.50   11.2
1.50 1.80   9.70
1.60 2.00 14 8.54
1.70 2.30   7.57
1.80 2.60 13 6.76
1.90 2.80   6.05
2.00 3.10 12 5.47