QTc Calculator (Bazett)

Typically < 440 ms (men) or < 460 ms (women).

QTc = QT ÷ √RR.

QTc (ms) 380

Step-by-step with your numbers:

1. Values used:

2. QT interval = 380 ms

3. RR interval = 1,000 ms

4. QTc = 380ms

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Bazett's formula — corrected QT. Informational, not a clinical interpretation tool.

FAQ

Normal QTc?

Typically < 440 ms (men) or < 460 ms (women).