SPI Clock Calculator

Calculate SPI clock speed, prescaler values, and data transfer timing.

SPI Configuration

System Clock (Hz)

Target SPI Speed (Hz)

Bits per Transfer

SPI Mode

Data Size for Transfer (bytes)

4.000

MHz

Prescaler

Bit Time250.0 ns

Byte Time2.00 us

Transfer Time (1024 bytes)2.05 ms

Data Rate500.0 KB/s

CPOL0

CPHA0

Clock EdgeRising

SampleFirst Edge

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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.