UART Baud Rate Calculator

Calculate UART baud rate settings, divider values, and communication timing.

UART Configuration

System Clock (Hz)

Target Baud Rate

Oversampling

Data Bits

Stop Bits

Parity

Baud Rate Result

111111

Actual Baud

-3.55%

Error

Register Values

Divider Value9

AVR UBRR8

STM32 BRR139

Frame Timing

Bits per Frame10

Bit Time9.00 us

Frame Time90.00 us

Max Data Rate11.11 KB/s

Efficiency80.0%