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Easily calculate source voltage online using our free Source Voltage Calculator. Enter resistance, current, and voltage drop to get instant accurate results.
If you’ve ever worked with circuits, you know how vital source voltage is. It powers your entire system. That’s why we created this Source Voltage Calculator to make your life easier. You don’t need to do long manual math. Just enter the resistance, current, and voltage drop, and you’ll get the answer in seconds.
Source voltage is the total voltage provided by a power source to a circuit. It’s the sum of the voltage across all components plus any voltage drop in the wires. In simple terms, it’s what keeps the current flowing smoothly through your system.
The formula for source voltage is simple:
Vs = R × I + Vd
Where:
This means you multiply the resistance by the current, then add the voltage drop. That gives you the total voltage supplied by your source.
Let’s walk through an example so it’s easy to follow.
Example 1:
If the resistance is 4 ohms, the current is 5 amps, and the voltage drop is 20 volts, then:
Vs = 4 × 5 + 20
Vs = 20 + 20
Vs = 40 volts
Example 2:
For another case, if resistance is 3 ohms, current is 6 amps, and voltage drop is 30 volts, then:
Vs = 3 × 6 + 30
Vs = 18 + 30
Vs = 48 volts
Simple, right? You just plug in your values, and the formula does the rest.
You’ll love how quick this calculator is. Here’s how to use it:
You’ll instantly see the source voltage and step-by-step math. The tool even shows each stage of the calculation so you can understand the process clearly.
You might be wondering can’t I just use a formula? Sure, but calculators save time and mistakes. Engineers, students, and technicians use this tool to double-check circuit designs. It’s also helpful for DIY electronics lovers who want accurate voltage data fast.
Our Source Voltage Calculator makes it effortless to compute source voltage with precision. You don’t need to open a textbook or pull out a calculator. Just enter the values, and you’ll get an accurate voltage reading in moments. It’s quick, smart, and made for real-world use.
Vs = R × I + Vd
The unit is volts (V).
Yes, it supports multiple unit types such as millivolts, kilovolts, milliohms, and kiloohms.
Anyone from students learning electronics to engineers designing power systems.
Yes, the calculator converts units to base values before computing, ensuring high accuracy every time.