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QTc Correction Calculator

Health & Body

Bazett, Fridericia, Framingham, Hodges with sex-specific bands

Quick Answer

QTc Correction Calculator: Bazett, Fridericia, Framingham, Hodges with sex-specific bands. QTc Correction Calculator uses standard health formulas to compute accurate results instantly.

ms
bpm
QTc (Bazett) — Normal447.2 ms

RR interval 0.800 s · Fridericia 430.9 ms

Framingham 430.8 ms · Hodges 426.3 ms

Normal by sex-specific thresholds

How it works

  1. 1RR (s) = 60 / HR
  2. 2RR = 60 / 75 = 0.800 s
  3. 3Bazett = QT / √RR = 400 / √0.800 = 447.2 ms
  4. 4Fridericia = QT / ∛RR; Framingham = QT + 154(1−RR); Hodges = QT + 1.75(HR−60)

Reading the result

Normal <450 ms (male) / <460 ms (female); borderline to 470/480; prolonged beyond; >500 ms carries high torsades-de-pointes risk. Bazett overestimates at high heart rates and underestimates at low rates — cross-check with Fridericia (preferred in FDA drug studies).

Measure QT from lead II or V5-V6, take the longest measurable interval and exclude U waves. Common QT-prolonging drugs: amiodarone, sotalol, macrolides, fluoroquinolones, haloperidol, ondansetron, citalopram. Correct hypokalemia and hypomagnesemia first. This tool supports clinical reasoning, not diagnosis.

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How to Use

  1. Enter body metrics: fill height, weight, age etc. as prompted by the QTc Correction Calculator.
  2. Read value and grade: results appear instantly with an authority-based classification.
  3. Check reference tables: confirm your range and healthy targets against the tables on this page.
  4. Back-solve your goal: adjust inputs to see what it takes to reach a target.

Key Points

  • QTc Correction Calculator is a free online health tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Bazett, Fridericia, Framingham, Hodges with sex-specific bands.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

QTc Correction Calculator formula

QTc Correction Calculator uses standard health formulas to compute accurate results instantly.

FAQ

How do I use the QTc Correction Calculator?
Open the page and fill in the input fields — results update automatically. Bazett, Fridericia, Framingham, Hodges with sex-specific bands.
Are the results accurate?
Results follow published international standards (WHO, ACE, IOM) and are for reference only.
Can this replace medical advice?
No. Always consult a qualified healthcare professional for health decisions.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on all devices.

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Source & Updates

Based on WHO, ACE, IOM and other published international standards. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Maintained and periodically reviewed by the YiJianSuan editorial team — review process in ourEditorial Policy.

Cite this page: YiJianSuan. QTc Correction Calculator[EB/OL]. https://www.yijiansuan.com/en/c/health/qtc

Results provided by this tool are for reference only and do not constitute professional advice.