Injury Frequency Rate Calculator

✖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.ⓘ Number of Disabling Injuries [I_n]			+10% -10%
✖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.ⓘ Man Hour [N_mh]			+10% -10%

✖Injury Frequency Rate defines the number of disabling injuries per one lakh man hours worked.ⓘ Injury Frequency Rate [I_r]

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Formula

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Injury Frequency Rate

Formula

`"I"_{"r"} = "I"_{"n"}*100000/"N"_{"mh"}`

Example

`"800"="20"*100000/"2500"`

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Injury Frequency Rate Solution

STEP 0: Pre-Calculation Summary

Formula Used

Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour
I_r = I_n*100000/N_mh
This formula uses 3 Variables

Variables Used

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

STEP 1: Convert Input(s) to Base Unit

Number of Disabling Injuries: 20 --> No Conversion Required
Man Hour: 2500 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

I_r = I_n*100000/N_mh --> 20*100000/2500

Evaluating ... ...

I_r = 800

STEP 3: Convert Result to Output's Unit

800 --> No Conversion Required

FINAL ANSWER

800 <-- Injury Frequency Rate

(Calculation completed in 00.004 seconds)

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Credits

Created by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

Chandana P Dev has created this Calculator and 500+ more calculators!

Verified by Mithila Muthamma PA

Coorg Institute of Technology (CIT), Coorg

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< 8 Construction Safety Management Calculators

Injury Frequency Rate given Injury Index

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

Severity Rate given Injury Index

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

Injury Index

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

Number of Disabling Injuries given Frequency Rate

Go Number of Disabling Injuries = Injury Frequency Rate*Man Hour/100000

Number of Man-Hour Worked given Frequency Rate

Go Man Hour = Number of Disabling Injuries*100000/Injury Frequency Rate

Injury Frequency Rate

Go Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour

Number of Days Lost given Severity Rate

Go Lost Days = Injury Severity Rate*Man Hour/1000

Injury Severity Rate

Go Injury Severity Rate = Lost Days*1000/Man Hour

Injury Frequency Rate Formula

Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour
I_r = I_n*100000/N_mh

What are the Approaches to Improve Safety in Construction Field?

Many rules and recommendations have been laid down as the result of research by societies, organizations and institutions on how to improve safety. Recognizing the importance of safety performance, a contractor can approach the problem in four different ways.
1 Organizational approach
i. Safety departments
ii. Committee
iii. Field Procedures
iv. Incentives
v. Safety Cost
2 Physical Approach
3 Economic incentives
4 Behavioral Approach

What is Disabling Injury?

The disabling injury means an injury which causes a loss of working time beyond the term, shift or day during which the injury occurred. Thus injury-frequency rate denotes how frequently accidents occurred. Bat it does not take into account the time lost because of an injury.

How to Calculate Injury Frequency Rate?

Injury Frequency Rate calculator uses Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour to calculate 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 calculate Injury Frequency Rate using this online calculator? To use this online calculator for Injury Frequency Rate, enter Number of Disabling Injuries (I_n) & Man Hour (N_mh) and hit the calculate button. Here is how the Injury Frequency Rate calculation can be explained with given input values -> 800 = 20*100000/2500.

FAQ

What is 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 and is represented as I_r = I_n*100000/N_mh or Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour. 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 & 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.

How to calculate 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 is calculated using Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour. To calculate Injury Frequency Rate, you need Number of Disabling Injuries (I_n) & Man Hour (N_mh). With our tool, you need to enter the respective value for Number of Disabling Injuries & Man Hour and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Injury Frequency Rate?

In this formula, Injury Frequency Rate uses Number of Disabling Injuries & Man Hour. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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