Boost Converter Calculator

Calculate output voltage and duty cycle for a DC-to-DC step-up converter.

Input Parameters

Input Voltage (Vin)

Output Voltage (Vout)

Efficiency (η)

Calculation Results

Required Duty Cycle (D)-

Duty Cycle (%)-%

Voltage Gain2.00x

About this calculator

Quick Reference

VinInput Voltage

VoutOutput Voltage

DDuty Cycle (fraction of period switch is on)

ηEfficiency

Overview

A boost converter (step-up converter) is a DC-to-DC power converter that steps up voltage from its input (supply) to its output (load).

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Pro Tips

Duty cycle (D) must be between 0 and 1.
Efficiency defaults to 100% in simplified calculations but real converters are usually 85-95%.
Vout must be greater than Vin for a boost converter to function.

Fun Facts

"Boost converters are used in battery-powered devices to step up a 3.7V battery source to 5V or more."
"They are a type of switching-mode power supply (SMPS)."
"The inductor stores energy while the switch is closed and releases it when it opens."

Formula: Vout = Vin / (1 - D)