Home Back

Fried's Rule Calculator Formula

Fried's Rule Formula:

\[ Dose = \frac{Adult \times Age\ (months)}{150} \]

mg
months

Unit Converter ▲

Unit Converter ▼

From: To:

1. What is Fried's Rule?

Fried's Rule is a pediatric dosing formula used to calculate appropriate medication doses for infants based on the child's age in months and the standard adult dose. It provides a simple method for estimating pediatric medication requirements.

2. How Does the Calculator Work?

The calculator uses Fried's Rule formula:

\[ Dose = \frac{Adult \times Age\ (months)}{150} \]

Where:

Explanation: The formula assumes that a child's medication requirement is proportional to their age in months relative to the standard adult dose.

3. Importance of Pediatric Dosing

Details: Accurate pediatric dosing is crucial for medication safety and efficacy in children. Underdosing may lead to ineffective treatment, while overdosing can cause serious adverse effects.

4. Using the Calculator

Tips: Enter the standard adult dose in milligrams and the child's age in months. All values must be valid (adult dose > 0, age between 1-144 months).

5. Frequently Asked Questions (FAQ)

Q1: What age range is Fried's Rule appropriate for?
A: Fried's Rule is typically used for infants and young children up to 2 years of age (24 months).

Q2: Are there limitations to Fried's Rule?
A: Yes, this rule provides only an estimate and may not be appropriate for all medications or clinical situations. Always consult with a healthcare professional.

Q3: How does Fried's Rule compare to other pediatric dosing methods?
A: Fried's Rule is one of several pediatric dosing methods. Other approaches include Clark's Rule (based on weight) and Young's Rule (based on age in years).

Q4: Should Fried's Rule be used for all medications?
A: No, some medications require specific pediatric dosing protocols. Always follow manufacturer recommendations and medical guidance.

Q5: Is professional medical advice still necessary?
A: Absolutely. This calculator provides estimates only. Always consult with a healthcare provider for proper medication dosing.

Fried's Rule Calculator Formula© - All Rights Reserved 2025