Voltage to PPM

Calculate PPM drift from voltage change.

Verified ToolUpdated: January 10, 2026
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Drift (PPM)

Methodology & Sources

PPM drift is the ratio of the change in value to the original value, expressed in millionths. We normalize the drift units to Volts and the Reference Voltage to Volts, then calculate the ratio.

The underlying formula used is:

(Drift (mV) / 1000 / Vref) * 1,000,000

References

  • Electronics Industry Standards

Frequently Asked Questions

How do I calculate drift in PPM?

Divide the change in voltage (in Volts) by the reference voltage, then multiply by 1,000,000.

Example?

If a 5V ref drifts by 1mV (0.001V): (0.001 / 5) * 1,000,000 = 200 PPM.
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