Voltage Divider Calculator

Voltage Divider Calculator

Easily solve voltage divider circuits

Enter any 3 known values —

• Input Voltage (Vin)

• Output Voltage (Vout)

• Resistor 1 (R1)

• Resistor 2 (R2)

and the app instantly calculates the fourth.

NEW in this version:

• Loaded divider support — add an optional Load Resistance (RL) to see the real output voltage under load

• Power dissipation — see P(R1) and P(R2) instantly, so you can pick the right resistor wattage

• Standard values — get the nearest E24 resistor value for your calculated resistance

• Completely ad-free — no banners, no pop-ups, no tracking

Supports Ohms and Kilo-Ohms, with instant results as you type.

Perfect for students, hobbyists, and engineers doing quick, accurate circuit analysis and design.

Compatible with both iPhone and iPad.