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

111111

Actual Baud

-3.55%

Error

Divider Value9

AVR UBRR8

STM32 BRR139

Bits per Frame10

Bit Time9.00 us

Frame Time90.00 us

Max Data Rate11.11 KB/s

Efficiency80.0%

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MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: Standard Mathematical References

by Various

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.