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Injury Frequency Rate Formula

GoInjury Frequency Rate given Injury Index Formula

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Injury Frequency Rate defines the number of disabling injuries per one lakh man hours worked. Check FAQs

I r = I n \cdot \frac{100000}{N mh}

I_r - Injury Frequency Rate?I_n - Number of Disabling Injuries?N_mh - Man Hour?

Injury Frequency Rate Example

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Here is how the Injury Frequency Rate equation looks like with Values.

Here is how the Injury Frequency Rate equation looks like with Units.

Here is how the Injury Frequency Rate equation looks like.

800 = 20 \cdot \frac{100000}{2500}

800 = 20 \cdot \frac{100000}{2500}

800 = 20 \cdot \frac{100000}{2500}

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Injury Frequency Rate Solution

Follow our step by step solution on how to calculate Injury Frequency Rate?

FIRST Step Consider the formula

I r = I n \cdot \frac{100000}{N mh}

Next Step Substitute values of Variables

∴

I r = 20 \cdot \frac{100000}{2500}

Next Step Prepare to Evaluate

∴

I r = 20 \cdot \frac{100000}{2500}

LAST Step Evaluate

∴

I r = 800

Injury Frequency Rate Formula Elements

Variables

Injury Frequency Rate

Injury Frequency Rate defines the number of disabling injuries per one lakh man hours worked.

Symbol: I_r

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Injury Frequency Rate

Number of Disabling Injuries

Number of Disabling Injuries refers to the injuries that result in either death or permanent disability, or temporary total disability after the day of injury.

Symbol: I_n

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Number of Disabling Injuries

Man Hour

Man Hour is used to measure the efforts needed to complete a task. 1 man hour is work completed in an hour of uninterrupted effort by an average worker.

Symbol: N_mh

Measurement: NAUnit: Unitless

Note: Value should be greater than 0.

Formulas to find Man Hour

Other Formulas to find Injury Frequency Rate

Go Injury Frequency Rate given Injury Index

I r = II \cdot \frac{1000}{I n \cdot R i}

Other formulas in Construction Safety Management category

Go Number of Disabling Injuries given Frequency Rate

I n = I r \cdot \frac{N mh}{100000}

Go Number of Man-Hour Worked given Frequency Rate

N mh = I n \cdot \frac{100000}{I r}

Go Injury Severity Rate

R i = D l \cdot \frac{1000}{N mh}

Go Number of Days Lost given Severity Rate

D l = R i \cdot \frac{N mh}{1000}

How to Evaluate Injury Frequency Rate?

Injury Frequency Rate evaluator uses Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour to evaluate the Injury Frequency Rate, The Injury Frequency Rate formula is defined as the number of disabling injuries that occurred per one lakh man hours worked. It gives information about how frequently accidents occur. Injury Frequency Rate is denoted by I_r symbol.

How to evaluate Injury Frequency Rate using this online evaluator? To use this online evaluator for Injury Frequency Rate, enter Number of Disabling Injuries (I_n) & Man Hour (N_mh) and hit the calculate button.

FAQs on Injury Frequency Rate

What is the formula to find Injury Frequency Rate?

The formula of Injury Frequency Rate is expressed as Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour. Here is an example- 800 = 20*100000/2500.

How to calculate Injury Frequency Rate?

With Number of Disabling Injuries (I_n) & Man Hour (N_mh) we can find Injury Frequency Rate using the formula - Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour.

What are the other ways to Calculate Injury Frequency Rate?

Here are the different ways to Calculate Injury Frequency Rate-

Injury Frequency Rate=Injury Index*1000/(Number of Disabling Injuries*Injury Severity Rate)

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Injury Frequency Rate Formula

​GoInjury Frequency Rate given Injury Index Formula

Injury Frequency Rate Example

Injury Frequency Rate Solution

Injury Frequency Rate Formula Elements

Other Formulas to find Injury Frequency Rate

Other formulas in Construction Safety Management category

How to Evaluate Injury Frequency Rate?

FAQs on Injury Frequency Rate

Variable Name

GoInjury Frequency Rate given Injury Index Formula