ECG Paper & Grid System — ECG Academy Lesson

Use the ECG grid as a measurement tool: convert boxes to seconds and mV, verify calibration, and manually confirm monitor rates.

Learning Objectives

• Identify small-box and large-box values for time and voltage
• Measure intervals using the horizontal axis at standard paper speed
• Measure waveform amplitude using the vertical axis at standard calibration
• Use calibration marks to detect non-standard gain settings before interpretation
• Apply 300, 1500, and 6-second rate methods to verify monitor-displayed rates