DC 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
Wire and winding calculations:
Calculate DC power: 5V, 2A, W
Using this calculation, you can calculate the power of a DC load knowing the voltage and current. You can also calculate the current knowing the power and voltage, and finally, calculate the voltage knowing the power and current. P=V.I I=P/V V=P/I
Enter any 2 values, the 3rd one will be calculated:
Some common voltages:
| Alkaline Zinc-Carbon |
NiMH, NiCd rechargeable |
Li-Ion 3.6V |
Li-Ion 3.7V |
Li-Ion full 4.2V |
LiFePO4 (LFP) 3.2V |
Lead-acid battery |
Power supply |
|---|---|---|---|---|---|---|---|
|
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: 4.2V 2-cell: 8.4V 3-cell: 12.6V 4-cell: 16.8V 5-cell: 21V 6-cell: 25.2V 7-cell: 29.4V 8-cell: 33.6V 9-cell: 37.8V 10-cell: 42V 11-cell: 46.2V 12-cell: 50.4V |
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 |
DC power formula says:
•When a DC load (or a resistive AC load) draws 2A (two amps) current at 5V (five volts) voltage, it's power input is 10W (ten watts).•If a 5V (five volts) load draws 10W (ten watts) power, its current consumption is 2A (two amps).
•When a load runs at 2A (two amps) current at 10W (ten watts) power input, its voltage is 5V (five volts).
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.