1. What is a Voltage Divider Ratio Calculator?

Definition: This calculator determines the output voltage ratio of a simple two-resistor voltage divider circuit.

Purpose: It helps electronics engineers, technicians, and hobbyists design and analyze voltage divider networks.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Ratio — Output voltage ratio (dimensionless)
• R1 — First resistor value (ohms)
• R2 — Second resistor value (ohms)

Explanation: The ratio represents what fraction of the input voltage appears across R2. Multiply this ratio by the input voltage to get the output voltage.

3. Importance of Voltage Divider Calculation

Details: Accurate voltage divider calculations are essential for creating reference voltages, signal conditioning, and impedance matching in electronic circuits.

4. Using the Calculator

Tips: Enter the values of both resistors in ohms. The ratio output will be between 0 and 1. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the practical application of voltage dividers?
A: They're used for reducing voltage levels, creating reference voltages, and as part of sensor circuits.

Q2: How do I get the actual output voltage?
A: Multiply the ratio by your input voltage. For example, with 5V input: Vout = Ratio × 5V.

Q3: What happens if R1 = R2?
A: The ratio becomes 0.5, meaning the output is exactly half the input voltage.

Q4: Why does the ratio have no units?
A: It's a dimensionless quantity representing the proportion of input voltage that appears at the output.

Q5: What resistor values should I use?
A: Choose values that don't draw excessive current (typically in the kΩ range) while maintaining good signal strength.