Electronics
Voltage at the load
What the equipment actually receives. A load can be outside its own tolerance band even when the percentage drop looks acceptable.
The Formula
V_load = V_supply - V_drop
What the equipment actually receives. A load can be outside its own tolerance band even when the percentage drop looks acceptable.
| Symbol | Meaning | Unit | Notes |
|---|---|---|---|
| V_supply | Supply voltage | volts | Measured at the origin of the circuit. |
| V_drop | Voltage drop | volts | The loss along the run. |
| V_load | Voltage at the load | volts | The delivered voltage. |
What Each Symbol Means
V_supplyvolts
Supply voltage
Measured at the origin of the circuit.
V_dropvolts
Voltage drop
The loss along the run.
V_loadvolts
Voltage at the load
The delivered voltage.
See It Worked With Real Numbers
A formula on its own does not tell you which number goes where. The how to calculate voltage drop page applies this equation to a concrete case, shows every intermediate step, and names the mistakes that produce a wrong answer even when the algebra is right.
Where This Formula Appears
This equation is the working core of How To Calculate Voltage Drop, filed under Science. Every number the guide produces comes from substituting into this one line.