A current-unit conversion and a voltage-drop estimate answer different questions. Use the current converter to express the same current in amperes, milliamperes, or microamperes. Use the voltage-drop worksheet to estimate loss along a two-conductor run with a known conductor resistance.
What each calculator does
The electric current converter converts through amperes using factors 1, 0.001, and 0.000001. For example, 37.5 mA is 0.0375 A or 37,500 µA. Changing the unit does not change the physical current, and a supply’s maximum current rating does not tell you what a load actually draws.
The two-conductor voltage drop worksheet takes system voltage, current in amperes, one-way length in feet, and candidate-conductor resistance in ohms per 1,000 feet. It computes drop = 2 × current × resistance × length ÷ 1,000, then percentage = drop ÷ system voltage × 100. At 120 V, 16 A, 50 ft, and 1.93 Ω/1,000 ft, that is 3.088 V, displayed as 3.09 V and 2.57%.
| Question | Current converter | Voltage drop worksheet |
|---|---|---|
| Task | Express a known current in another unit | Estimate voltage loss for a known resistance and run |
| Inputs | Current value, source unit, target unit | Voltage, current, one-way length, resistance |
| Outputs | Converted current and equivalents | Voltage drop and percentage |
| Scope | Unit conversion only | Two-conductor arithmetic only |
Choose the next step
If a data sheet lists current in mA or µA, convert it to A before using an ampere-based formula. Then enter current, voltage, run length, and the appropriate manufacturer resistance in the voltage-drop worksheet. Keep resistance units and the one-way length convention consistent.
Neither tool chooses wire gauge, determines ampacity, or checks electrical-code compliance. The current converter does not model conductor heating or protection, and the voltage-drop result depends on the resistance supplied. Electrical design and installation require the applicable product data, requirements, and qualified evaluation.