Engineering Calculator

I2C Pull-Up Resistor Calculator

Estimate maximum I2C pull-up resistor from rise time and bus capacitance.

Result will appear here.

Frequently asked questions

What is the I2C Pull-Up Resistor Calculator used for?

This calculator is used for quick electronics engineering estimates, formula checks and early circuit design decisions.

Are the calculator results exact?

The result is based on the displayed formula and input values. Real hardware can be affected by tolerances, temperature, layout and component limitations.

Can I use this calculator for production design?

Use it as an engineering estimate. Always verify final production designs with datasheets, simulations, manufacturer recommendations and measurements.