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
Wire and winding calculations:
Calculate Ohm's Law: 12V, 300mΩ, A
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:
Standard EIA Decade Values of resistors - decade 100 to 1000 mΩ
| E6 | E12 | E24 |
|---|---|---|
| 100 mΩ 150 mΩ 220 mΩ 330 mΩ 470 mΩ 680 mΩ | 100 mΩ, 120 mΩ 150 mΩ, 180 mΩ 220 mΩ, 270 mΩ 330 mΩ, 390 mΩ 470 mΩ, 560 mΩ 680 mΩ, 820 mΩ | 100 mΩ, 110 mΩ, 120 mΩ, 130 mΩ 150 mΩ, 160 mΩ, 180 mΩ, 200 mΩ 220 mΩ, 240 mΩ, 270 mΩ, 300 mΩ 330 mΩ, 360 mΩ, 390 mΩ, 430 mΩ 470 mΩ, 510 mΩ, 560 mΩ, 620 mΩ 680 mΩ, 750 mΩ, 820 mΩ, 910 mΩ |
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 12V (twelve volts) voltage is applied to 300mΩ (three hundred milliohms) resistance, the resulting current is 40A (fourty amps).•If a 40A (fourty amps) current is passed via 300mΩ (three hundred milliohms) resistance, its voltage drop is 12V (twelve volts).
•When a resistor passing 40A (fourty amps) drops 12V (twelve volts), its resistance is 300mΩ (three hundred milliohms).
•If 12V (twelve volts) voltage applied to a resistor results in 40A (fourty amps) current, the resistance is 300mΩ (three hundred milliohms).
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.