I2C Pull-up Resistor Calculator
Calculate optimal pull-up resistor values for I2C bus based on speed and capacitance.
I2C Bus Parameters
Typical: 10-20pF per device + trace capacitance
Recommended Resistor
1.8k Ohms
Standard
Resistance Range
Minimum (Vol/Iol)133 Ohms
Maximum (Rise Time)3541 Ohms
Calculated Optimal1837 Ohms
Bus Performance
Rise Time153 ns
Static Current (per line)1.61 mA
Total Static Current3.22 mA
Max Bus Capacitance197 pF
💡
Help us improve!
How would you rate the I2C Pull-up Resistor Calculator?
Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
📚
Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.