Is this calculation free and private?

Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.

What does the Voltage Divider Output & Load Calculator give me?

It works out Unloaded Output Voltage Vout, Loaded Output Voltage under RL, Voltage Transfer Ratio and Divider Quiescent Current, updating live as you change the inputs.

What do I need to enter?

Just Input Supply Voltage Vin, Top Resistor R1, Bottom Resistor R2 and External Load RL. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

Voltage Divider Output & Load Calculator

Calculate output voltage Vout, divider ratio, quiescent current, and loaded output voltage under external load resistance.

100% free
Private in browser
No signup
No watermarks

Input Supply Voltage Vin (Volts)

Top Resistor R1 (Ohms Ω)

Bottom Resistor R2 (Ohms Ω)

External Load RL (Ohms Ω, 0 if unloaded)

Unloaded Output Voltage Vout (V)

2.5

Loaded Output Voltage under RL (V)

2.381

Voltage Transfer Ratio (%)

Divider Quiescent Current (mA)

0.25

Rate this tool

Be the first to rate — helps others and improves this page.

About Voltage Divider Output & Load Calculator

Calculate output voltage Vout, divider ratio, quiescent current, and loaded output voltage under external load resistance. Enter Input Supply Voltage Vin, Top Resistor R1 and Bottom Resistor R2 and the tool works out Unloaded Output Voltage Vout, Loaded Output Voltage under RL and Voltage Transfer Ratio straight away. Everything runs in your browser, so your data never leaves your device.

How to use Voltage Divider Output & Load Calculator

Enter Input Supply Voltage Vin, Top Resistor R1 and Bottom Resistor R2.
Adjust the remaining options (External Load RL) to match your case.
Read Unloaded Output Voltage Vout, Loaded Output Voltage under RL and Voltage Transfer Ratio in the results panel — copy or download what you need.

Key features

Shows Unloaded Output Voltage Vout (V)
Shows Loaded Output Voltage under RL (V)
Shows Voltage Transfer Ratio (%)
4 adjustable inputs, results update as you type
No signup, no limits

Frequently asked questions

Is this calculation free and private?: Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the Voltage Divider Output & Load Calculator give me?: It works out Unloaded Output Voltage Vout, Loaded Output Voltage under RL, Voltage Transfer Ratio and Divider Quiescent Current, updating live as you change the inputs.
What do I need to enter?: Just Input Supply Voltage Vin, Top Resistor R1, Bottom Resistor R2 and External Load RL. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

Related In-Depth Guides

Learn practical workflows, real-world examples, and expert tips in our comprehensive guides:

Electronics & Engineering · 6 min read

Passive Filters & 555 Timer Circuits: Cutoff Frequencies, Astable Oscillators & Op-Amp Gain

Practical hardware electronics guide. Design RC low-pass filters, calculate 555 timer pulse frequencies, and size operational amplifier closed-loop gain.