basic

QTc Fridericia Calculator

QTc = QT / RR^(1/3) — less rate-dependent at extremes than Bazett.

Compute the rate-corrected QT interval using Fridericia's cube-root formula: QTc = QT / RR^(1/3). Preferred over Bazett at very low or very high heart rates.

Priya Venkatesan By Priya Venkatesan
Published Last reviewed 1 min read

Inputs

ms
bpm

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

QTc = QT / RR^(1/3), RR in seconds.

In depth

Compute the rate-corrected QT interval using Fridericia's cube-root formula: QTc = QT / RR^(1/3). Preferred over Bazett at very low or very high heart rates.