Reviewed By: Patrick Myers (BSME)
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Enter the power (watts) and the voltage (volts) into the calculator to determine the Current From Power.
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Current From Power Formula
The following formula is used to calculate the Current From Power.
Ifp = P/V
- Where Ifp is the Current From Power (amps)
- P is the power (watts)
- V is the voltage (volts)
To calculate current from power, divide the power by the voltage.
| Power (W) | Current (A) |
|---|---|
| 5 | 0.042 |
| 10 | 0.083 |
| 25 | 0.208 |
| 50 | 0.417 |
| 60 | 0.500 |
| 75 | 0.625 |
| 100 | 0.833 |
| 150 | 1.250 |
| 200 | 1.667 |
| 250 | 2.083 |
| 300 | 2.500 |
| 400 | 3.333 |
| 500 | 4.167 |
| 600 | 5.000 |
| 750 | 6.250 |
| 1000 | 8.333 |
| 1500 | 12.500 |
| 1800 | 15.000 |
| 2000 | 16.667 |
| 3000 | 25.000 |
| Formula: I = P ÷ V. Assumes single-phase DC/resistive load (power factor = 1) at 120 V. | |
How to Calculate Current From Power?
The following two example problems outline how to calculate the Current From Power.
Example Problem #1:
- First, determine the power (watts). In this example, the power (watts) is measured to be 5015.
- Next, determine the voltage (volts). For this problem, the voltage (volts) is calculated to be 40.
- Finally, calculate the Current From Power using the formula above:
Ifp = P/V
Inserting the values from above and solving the equation with the imputed values gives:
Ifp = 5015/40 = 125.375 (amps)
Example Problem #2:
Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:
power (watts) = 411
voltage (volts) = 50
Entering these values into the formula above gives :
Ifp = 411/50 = 8.22 (amps)
