online electronic calculator - Ohm's law and much more

Ohm's Law with power calculator

Online calculator for formulas used in electronic circuit design and electrical engineering.

Basic electric calculations:

Ohm's Law, Ohm's Law with power, DC power, AC real power, LC resonant frequency, Capacitor charging/discharging, Capacitive reactance, Capacitive current + reactive power, Capacitor energy, Capacitor Δ energy, RC discharging, Inductor square pulse, Inductive reactance, Inductive current + reactive power, Inductor energy, 2 parallel resistors, 3 parallel resistors, System bandwidth

Wire and winding calculations:

Diameter ↔ cross section ↔ AWG, Wire resistance, Wire weight, Current density, Wire R thermal drift

Calculate Ohm's Law with power: 6Ω, 12V, A, W


This combines the Ohm's law and Power law, for example to calculate the power of a resistive load or power dissipation (loss) of a resistor. You can find the power loss and current of a resistor knowing its resistance and the voltage, or its power loss and voltage knowing its resistance and the current. You can also calculate the maximum current and maximum voltage of a resistor knowing its resistance and maximum power rating, or the resistance and power of a resistive load or resistor knowing the voltage and current, or the current and resistance of a resistive load knowing its rated voltage and power rating.   Combines: V=R.I and P=V.I

Enter any 2 values, the other 2 will be calculated:

Resistance: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Voltage: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Current: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Power: -0.1 +0.1 -1 +1 -10 +10 -100 +100
Output metric prefix:   Automatic    User-selected
 

Standard EIA Decade Values of resistors - decade 1 to 10 Ω

E6E12E24
1.0 Ω
1.5 Ω
2.2 Ω
3.3 Ω
4.7 Ω
6.8 Ω
1.0 Ω, 1.2 Ω
1.5 Ω, 1.8 Ω
2.2 Ω, 2.7 Ω
3.3 Ω, 3.9 Ω
4.7 Ω, 5.6 Ω
6.8 Ω, 8.2 Ω
1.0 Ω, 1.1 Ω, 1.2 Ω, 1.3 Ω
1.5 Ω, 1.6 Ω, 1.8 Ω, 2.0 Ω
2.2 Ω, 2.4 Ω, 2.7 Ω, 3.0 Ω
3.3 Ω, 3.6 Ω, 3.9 Ω, 4.3 Ω
4.7 Ω, 5.1 Ω, 5.6 Ω, 6.2 Ω
6.8 Ω, 7.5 Ω, 8.2 Ω, 9.1 Ω

Other resistance decades:

100 - 1000 mΩ, 1 - 10 Ω, 10 - 100 Ω, 100 - 1000 Ω, 1 - 10 kΩ, 10 - 100 kΩ, 100 - 1000 kΩ, 1 - 10 MΩ, 10 - 100 MΩ, 100 - 1000 MΩ,

Some common voltages:

Alkaline
Zinc-Carbon
NiMH, NiCd
rechargeable
Li-Ion
3.6V
Li-Ion
3.7V
LiFePO4
(LFP) 3.2V
Lead-acid
battery
Power
supply
Mains
voltage
1-cell: 1.5V
2-cell: 3V
3-cell: 4.5V
4-cell: 6V
5-cell: 7.5V
6-cell: 9V
7-cell: 10.5V
8-cell: 12V
9-cell: 13.5V
10-cell: 15V
11-cell: 16.5V
12-cell: 18V
1-cell: 1.2V
2-cell: 2.4V
3-cell: 3.6V
4-cell: 4.8V
5-cell: 6V
6-cell: 7.2V
7-cell: 8.4V
8-cell: 9.6V
9-cell: 10.8V
10-cell: 12V
11-cell: 13.2V
12-cell: 14.4V
1-cell: 3.6V
2-cell: 7.2V
3-cell: 10.8V
4-cell: 14.4V
5-cell: 18V
6-cell: 21.6V
7-cell: 25.2V
8-cell: 28.8V
9-cell: 32.4V
10-cell: 36V
11-cell: 39.6V
12-cell: 43.2V
1-cell: 3.7V
2-cell: 7.4V
3-cell: 11.1V
4-cell: 14.8V
5-cell: 18.5V
6-cell: 22.2V
7-cell: 25.9V
8-cell: 29.6V
9-cell: 33.3V
10-cell: 37V
11-cell: 40.7V
12-cell: 44.4V
1-cell: 3.2V
2-cell: 6.4V
3-cell: 9.6V
4-cell: 12.8V
5-cell: 16V
6-cell: 19.2V
7-cell: 22.4V
8-cell: 25.6V
9-cell: 28.8V
10-cell: 32V
11-cell: 35.2V
12-cell: 38.4V
1-cell: 6V
2-cell: 12V
3-cell: 18V
4-cell: 24V
5-cell: 30V
6-cell: 36V
7-cell: 42V
8-cell: 48V
9-cell: 54V
10-cell: 60V
11-cell: 66V
12-cell: 72V
1.8V
2.5V
3V
3.3V
5V
6V
9V
12V
15V
18V
24V
48V
100V
110V
115V
120V
127V
208V
220V
230V
240V
380V
400V
415V

Ohm's Law with power says:

•When 12V (twelve volts) voltage is applied to 6Ω (six ohms) resistance, the resulting current is 2A (two amps) and the power (or power dissipation) is 24W (twenty-four watts).
•If a 2A (two amps) current is passed via 6Ω (six ohms) resistance, its voltage drop is 12V (twelve volts) and the power (or loss) is 24W (twenty-four watts).
•When a resistor passing 2A (two amps) drops 12V (twelve volts), its resistance is 6Ω (six ohms) and its power loss is 24W (twenty-four watts).
•If 12V (twelve volts) voltage applied to a resistor results in 2A (two amps) current, the resistance is 6Ω (six ohms) and the dissipation is 24W (twenty-four watts).
•When a resistive load draws 24W (twenty-four watts) at 12V (twelve volts), its current consumption is 2A (two amps) and its resistance is 6Ω (six ohms).
•A 6Ω (six ohms) resistor rated for 24W (twenty-four watts) maximum power dissipation has a maximum operating voltage of 12V (twelve volts) and its maximum current is 2A (two amps), otherwise its maximum power loss would be exceeded.



This is a simple online calculator for formulas used in electronic engineering and design.

This online calculator is for reference only. I do not guarantee it to work correctly. You use this at your own risk only.