Transistor Biasing Calculator
Voltage-divider bias Q-point estimation
How to Use This Calculator
Enter supply voltage, resistor values, estimated β and Vbe. The tool computes approximate Q-point using Thevenin base network.
Formula
Vth = VCC · R2/(R1+R2), Rth = (R1‖R2)
IB ≈ (Vth − VBE)/(Rth + (β+1)RE)
IC = βIB, VCE = VCC − ICRC − IERE
Frequently Asked Questions
How accurate is this?
It is a first-order DC estimate. Temperature and β variation are not modeled.
Does it support PNP?
Not explicitly. You can mirror signs conceptually; this tool targets NPN.