Ohm's Law

Capacitance Conversions

Unit Converter

Electronic Symbols

Inductor Code Color Chart

LED Resistor Calculator

Resistor Color Decoder

Capacitance Conversions

farads 

microfarads 

nanofarads 

picofarads 

abfarads 

statfarads 


1 F
1,000,000 μF
1,000,000,000 nF
1,000,000,000,000 pF
0.000000001 abF
898,755,224,015 stF

2 F
2,000,000 μF
2,000,000,000 nF
2,000,000,000,000 pF
0.000000002 abF
1,797,510,448,030 stF

3 F
3,000,000 μF
3,000,000,000 nF
3,000,000,000,000 pF
0.000000003 abF
2,696,265,672,044 stF

4 F
4,000,000 μF
4,000,000,000 nF
4,000,000,000,000 pF
0.000000004 abF
3,595,020,896,059 stF

5 F
5,000,000 μF
5,000,000,000 nF
5,000,000,000,000 pF
0.000000005 abF
4,493,776,120,074 stF

6 F
6,000,000 μF
 6,000,000,000 nF
6,000,000,000,000 pF
0.000000006 abF
5,392,531,344,088 stF

7 F
7,000,000 μF
7,000,000,000 nF
7,000,000,000,000 pF
0.000000007 abF
6,291,286,568,103 stF

8 F
8,000,000 μF
8,000,000,000 nF
8,000,000,000,000 pF
0.000000008 abF
7,190,041,792,118 stF

9 F
9,000,000 μF
9,000,000,000 nF
9,000,000,000,000 pF
0.000000009 abF
8,088,797,016,133 stF

10 F
10,000,000 μF
10,000,000,000 nF
10,000,000,000,000 pF
0.00000001 abF
8,987,552,240,147 stF

11 F
11,000,000 μF
11,000,000,000 nF
11,000,000,000,000 pF
0.000000011 abF
9,886,307,464,162 stF

12 F
12,000,000 μF
12,000,000,000 nF
12,000,000,000,000 pF
0.000000012 abF
10,785,062,688,177 stF

13 F
13,000,000 μF
13,000,000,000 nF
13,000,000,000,000 pF
0.000000013 abF
11,683,817,912,192 stF

14 F
14,000,000 μF
14,000,000,000 nF
14,000,000,000,000 pF
0.000000014 abF
12,582,573,136,206 stF

15 F
15,000,000 μF
15,000,000,000 nF
15,000,000,000,000 pF
0.000000015 abF
13,481,328,360,221 stF

16 F
16,000,000 μF
16,000,000,000 nF
16,000,000,000,000 pF
0.000000016 abF
14,380,083,584,236 stF

17 F
17,000,000 μF
17,000,000,000 nF
17,000,000,000,000 pF
0.000000017 abF
15,278,838,808,251 stF

18 F
18,000,000 μF
18,000,000,000 nF
18,000,000,000,000 pF
0.000000018 abF
16,177,594,032,265 stF

19 F
19,000,000 μF
19,000,000,000 nF
19,000,000,000,000 pF
0.000000019 abF
17,076,349,256,280 stF

20 F
20,000,000 μF
20,000,000,000 nF
20,000,000,000,000 pF
0.00000002 abF
17,975,104,480,295 stF

farads	microfarads	nanofarads	picofarads	abfarads	statfarads
1 F	1,000,000 μF	1,000,000,000 nF	1,000,000,000,000 pF	0.000000001 abF	898,755,224,015 stF
2 F	2,000,000 μF	2,000,000,000 nF	2,000,000,000,000 pF	0.000000002 abF	1,797,510,448,030 stF
3 F	3,000,000 μF	3,000,000,000 nF	3,000,000,000,000 pF	0.000000003 abF	2,696,265,672,044 stF
4 F	4,000,000 μF	4,000,000,000 nF	4,000,000,000,000 pF	0.000000004 abF	3,595,020,896,059 stF
5 F	5,000,000 μF	5,000,000,000 nF	5,000,000,000,000 pF	0.000000005 abF	4,493,776,120,074 stF
6 F	6,000,000 μF	6,000,000,000 nF	6,000,000,000,000 pF	0.000000006 abF	5,392,531,344,088 stF
7 F	7,000,000 μF	7,000,000,000 nF	7,000,000,000,000 pF	0.000000007 abF	6,291,286,568,103 stF
8 F	8,000,000 μF	8,000,000,000 nF	8,000,000,000,000 pF	0.000000008 abF	7,190,041,792,118 stF
9 F	9,000,000 μF	9,000,000,000 nF	9,000,000,000,000 pF	0.000000009 abF	8,088,797,016,133 stF
10 F	10,000,000 μF	10,000,000,000 nF	10,000,000,000,000 pF	0.00000001 abF	8,987,552,240,147 stF
11 F	11,000,000 μF	11,000,000,000 nF	11,000,000,000,000 pF	0.000000011 abF	9,886,307,464,162 stF
12 F	12,000,000 μF	12,000,000,000 nF	12,000,000,000,000 pF	0.000000012 abF	10,785,062,688,177 stF
13 F	13,000,000 μF	13,000,000,000 nF	13,000,000,000,000 pF	0.000000013 abF	11,683,817,912,192 stF
14 F	14,000,000 μF	14,000,000,000 nF	14,000,000,000,000 pF	0.000000014 abF	12,582,573,136,206 stF
15 F	15,000,000 μF	15,000,000,000 nF	15,000,000,000,000 pF	0.000000015 abF	13,481,328,360,221 stF
16 F	16,000,000 μF	16,000,000,000 nF	16,000,000,000,000 pF	0.000000016 abF	14,380,083,584,236 stF
17 F	17,000,000 μF	17,000,000,000 nF	17,000,000,000,000 pF	0.000000017 abF	15,278,838,808,251 stF
18 F	18,000,000 μF	18,000,000,000 nF	18,000,000,000,000 pF	0.000000018 abF	16,177,594,032,265 stF
19 F	19,000,000 μF	19,000,000,000 nF	19,000,000,000,000 pF	0.000000019 abF	17,076,349,256,280 stF
20 F	20,000,000 μF	20,000,000,000 nF	20,000,000,000,000 pF	0.00000002 abF	17,975,104,480,295 stF

Open the Calculator

Symbol	Component name	Description
Wire Symbols
	Electrical Wire	Conductor of electrical current
	Connected Wires	Connected crossing
	Not Connected Wires	Wires are not connected
Switch Symbols and Relay Symbols
	SPST Toggle Switch	Disconnects current when open
	SPDT Toggle Switch	Selects between two connections
	Pushbutton Switch (N.O)	Momentary switch - normally open
	Pushbutton Switch (N.C)	Momentary switch - normally closed
	DIP Switch	DIP switch is used for onboard configuration
	SPST Relay	Relay open / close connection by an electromagnet
	SPDT Relay	Relay open / close connection by an electromagnet
	Jumper	Close connection by jumper insertion on pins.
	Solder Bridge	Solder to close connection
Ground Symbols
	Earth Ground	Used for zero potential reference and electrical shock protection.
	Chassis Ground	Connected to the chassis of the circuit
	Digital / Common Ground
Resistor Symbols
	Resistor (IEEE)	Resistor reduces the current flow.
	Resistor (IEC)	Resistor reduces the current flow.
	Potentiometer (IEEE)	Adjustable resistor - has 3 terminals.
	Potentiometer (IEC)	Adjustable resistor - has 3 terminals.
	Variable Resistor / Rheostat (IEEE)	Adjustable resistor - has 2 terminals.
	Variable Resistor / Rheostat (IEC)	Adjustable resistor - has 2 terminals.
	Trimmer Resistor	Preset resistor
	Thermistor	Thermal resistor - change resistance when temperature changes
	Photoresistor / Light dependent resistor (LDR)	Photo-resistor - change resistance with light intensity change
Capacitor Symbols
	Capacitor	Capacitor is used to store electric charge. It acts as short circuit with AC and open circuit with DC.
	Capacitor
	Electrolytic capacitor
	Polarized Capacitor	Electrolytic capacitor
	Variable Capacitor	Adjustable capacitance
Inductor / Coil Symbols
	Inductor	Coil / solenoid that generates magnetic field
	">Iron Core Inductor	Includes iron
	">Variable Inductor
Power Supply Symbols
	Voltage Source	Generates constant voltage
	Current Source	Generates constant current.
	AC Voltage Source	AC voltage source
	Generator	Electrical voltage is generated by mechanical rotation of the generator
	Battery Cell	Generates constant voltage
	Battery	Generates constant voltage
	Controlled Voltage Source	Generates voltage as a function of voltage or current of other circuit element.
	Controlled Current Source	Generates current as a function of voltage or current of other circuit element.
Meter Symbols
	Voltmeter	Measures voltage. Has very high resistance. Connected in parallel.
	Ammeter	Measures electric current. Has near zero resistance. Connected serially.
	Ohmmeter	Measures resistance
	Wattmeter	Measures electric power
Lamp / Light Bulb Symbols
	Lamp / light bulb	Generates light when current flows through
	Lamp / light bulb
	Lamp / light bulb
Diode / LED Symbols
	Diode	Diode allows current flow in one direction only - left (anode) to right (cathode).
	Zener Diode	Allows current flow in one direction, but also can flow in the reverse direction when above breakdown voltage
	Schottky Diode	Schottky diode is a diode with low voltage drop
	Varactor / Varicap Diode	Variable capacitance diode
	Tunnel Diode
	Light Emitting Diode (LED)	LED emits light when current flows through
	Photodiode	Photodiode allows current flow when exposed to light
Transistor Symbols
	NPN Bipolar Transistor	Allows current flow when high potential at base (middle)
	PNP Bipolar Transistor	Allows current flow when low potential at base (middle)
	Darlington Transistor	Made from 2 bipolar transistors. Has total gain of the product of each gain.
	JFET-N Transistor	N-channel field effect transistor
	JFET-P Transistor	P-channel field effect transistor
	NMOS Transistor	N-channel MOSFET transistor
	PMOS Transistor	P-channel MOSFET transistor
Misc. Symbols
	Motor	Electric motor
	Transformer	Change AC voltage from high to low or low to high.
	Electric bell	Rings when activated
	Buzzer	Produce buzzing sound
	Fuse	The fuse disconnects when current above threshold. Used to protect circuit from high currents.
	Fuse
	Bus	Contains several wires. Usually for data / address.
	Bus
	Bus
	Optocoupler / Opto-isolator	Optocoupler isolates connection to other board
	Loudspeaker	Converts electrical signal to sound waves
	Microphone	Converts sound waves to electrical signal
	Operational Amplifier	Amplify input signal
	Schmitt Trigger	Operates with hysteresis to reduce noise.
	Analog-to-digital converter (ADC)	Converts analog signal to digital numbers
	Digital-to-Analog converter (DAC)	Converts digital numbers to analog signal
	Crystal Oscillator	Used to generate precise frequency clock signal
Antenna Symbols
	Antenna / aerial	Transmits & receives radio waves
	Antenna / aerial	Transmits & receives radio waves
	Dipole Antenna	Two wires simple antenna
Logic Gates Symbols
	NOT Gate (Inverter)	Outputs 1 when input is 0
	AND Gate	Outputs 1 when both inputs are 1.
	NAND Gate	Outputs 0 when both inputs are 1. (NOT + AND)
	OR Gate	Outputs 1 when any input is 1.
	NOR Gate	Outputs 0 when any input is 1. (NOT + OR)
	XOR Gate	Outputs 1 when inputs are different. (Exclusive OR)
	D Flip-Flop	Stores one bit of data
	Multiplexer / Mux 2 to 1	Connects the output to selected input line.
	Multiplexer / Mux 4 to 1	Connects the output to selected input line.
	Demultiplexer / Demux 1 to 4	Connects selected output to the input line.

Inductor Color Code Chart

Molded & Coated Inductor Color Coding

Cylindrical molded choke coils are marked with five colored bands. A wide silver band, located at one end of the coil, identifies military radio-fequency coils. The next three bands indicate the inductance in micro-henries and the fourth band is the tolerance.

Color coding is in accordance with the color code table shown right. If the first or second band is gold, this represents the decimal point for inductance values less than ten. Then the following two bands significant figures. For inductance values of 10 or more, the first two bands represent significant figures and the third is the multiplier.