online electronic calculator - Ohm's law and much more

Ohm's Law 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, Bandwidth ↔ rise time

Wire and winding calculations:

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

Calculate Ohm's Law: 40.7V, 310kΩ, uA


Using Ohm's law, you can calculate the current knowing the voltage and resistance. Ohm's law can also calculate resistance knowing the voltage and current, and finally, calculate the voltage knowing the resistance and current. Works based on well known formulas:   V=R.I   R=V/I   I=V/R

Enter any 2 values, the 3rd one will be calculated:

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

Standard EIA Decade Values of resistors - decade 100 to 1000 kΩ

E6E12E24
100 kΩ
150 kΩ
220 kΩ
330 kΩ
470 kΩ
680 kΩ
100 kΩ, 120 kΩ
150 kΩ, 180 kΩ
220 kΩ, 270 kΩ
330 kΩ, 390 kΩ
470 kΩ, 560 kΩ
680 kΩ, 820 kΩ
100 kΩ, 110 kΩ, 120 kΩ, 130 kΩ
150 kΩ, 160 kΩ, 180 kΩ, 200 kΩ
220 kΩ, 240 kΩ, 270 kΩ, 300 kΩ
330 kΩ, 360 kΩ, 390 kΩ, 430 kΩ
470 kΩ, 510 kΩ, 560 kΩ, 620 kΩ
680 kΩ, 750 kΩ, 820 kΩ, 910 kΩ

Other resistance decades:

0.1 - 1 Ω, 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
3-cell: 6V
6-cell: 12V
9-cell: 18V
12-cell: 24V
15-cell: 30V
18-cell: 36V
21-cell: 42V
24-cell: 48V
27-cell: 54V
30-cell: 60V
33-cell: 66V
36-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 says:

•When 40.7V (fourty point seven volts) voltage is applied to 310kΩ (three hundred and ten kiloohms) resistance, the resulting current is 131.2903225806uA (one hundred and thirty-one point two nine zero three two two five eight zero six microamps).
•If a 131.2903225806uA (one hundred and thirty-one point two nine zero three two two five eight zero six microamps) current is passed via 310kΩ (three hundred and ten kiloohms) resistance, its voltage drop is 40.7V (fourty point seven volts).
•When a resistor passing 131.2903225806uA (one hundred and thirty-one point two nine zero three two two five eight zero six microamps) drops 40.7V (fourty point seven volts), its resistance is 310kΩ (three hundred and ten kiloohms).
•If 40.7V (fourty point seven volts) voltage applied to a resistor results in 131.2903225806uA (one hundred and thirty-one point two nine zero three two two five eight zero six microamps) current, the resistance is 310kΩ (three hundred and ten kiloohms).



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.