Injury Severity Rate Calculator

✖Lost Days defines the umber of days lost due to injury occurred.ⓘ Lost Days [D_l]			+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 Severity Rate defines the number of days lost time due to injury for 1000 man hours worked.ⓘ Injury Severity Rate [R_i]

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Formula

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Injury Severity Rate

Formula

`"R"_{"i"} = "D"_{"l"}*1000/"N"_{"mh"}`

Example

`"18"="45"*1000/"2500"`

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Injury Severity Rate Solution

STEP 0: Pre-Calculation Summary

Formula Used

Injury Severity Rate = Lost Days*1000/Man Hour
R_i = D_l*1000/N_mh
This formula uses 3 Variables

Variables Used

Injury Severity Rate - Injury Severity Rate defines the number of days lost time due to injury for 1000 man hours worked.
Lost Days - Lost Days defines the umber of days lost due to injury occurred.
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

Lost Days: 45 --> No Conversion Required
Man Hour: 2500 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_i = D_l*1000/N_mh --> 45*1000/2500

Evaluating ... ...

R_i = 18

STEP 3: Convert Result to Output's Unit

18 --> No Conversion Required

FINAL ANSWER

18 <-- Injury Severity Rate

(Calculation completed in 00.004 seconds)

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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 Severity Rate Formula

Injury Severity Rate = Lost Days*1000/Man Hour
R_i = D_l*1000/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 Severity Rate?

Injury Severity Rate calculator uses Injury Severity Rate = Lost Days*1000/Man Hour to calculate the Injury Severity Rate, The Injury Severity Rate formula is defined as a safety metric which companies use to measure how critical the injuries sustained in a period of time where by using the number of lost days (on average) per accident as a proxy for severity. Injury Severity Rate is denoted by R_i symbol.

How to calculate Injury Severity Rate using this online calculator? To use this online calculator for Injury Severity Rate, enter Lost Days (D_l) & Man Hour (N_mh) and hit the calculate button. Here is how the Injury Severity Rate calculation can be explained with given input values -> 18 = 45*1000/2500.

FAQ

What is Injury Severity Rate?

The Injury Severity Rate formula is defined as a safety metric which companies use to measure how critical the injuries sustained in a period of time where by using the number of lost days (on average) per accident as a proxy for severity and is represented as R_i = D_l*1000/N_mh or Injury Severity Rate = Lost Days*1000/Man Hour. Lost Days defines the umber of days lost due to injury occurred & 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 Severity Rate?

The Injury Severity Rate formula is defined as a safety metric which companies use to measure how critical the injuries sustained in a period of time where by using the number of lost days (on average) per accident as a proxy for severity is calculated using Injury Severity Rate = Lost Days*1000/Man Hour. To calculate Injury Severity Rate, you need Lost Days (D_l) & Man Hour (N_mh). With our tool, you need to enter the respective value for Lost Days & 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 Severity Rate?

In this formula, Injury Severity Rate uses Lost Days & Man Hour. We can use 1 other way(s) to calculate the same, which is/are as follows -

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

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