# Tools & Calculators

## 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