Time of Death Calculator

While this is a difficult subject, understanding more about someone's passing can be crucial for closure or forensic investigations. Use this tool to estimate how long ago someone passed away based on their body temperature.

Required Information


Estimated Time Since Death:

Why is it

Why is Time of Death Important?

Create Date: October 7, 2024

Last Modified Date: November 19, 2024

Determining the time of death is crucial for law enforcement, forensic scientists, and the loved ones of the deceased. It can help establish a timeline of events, identify or rule out suspects, and provide closure to those left behind.

How to Calculate Time Since Death

The estimation of time since death can be derived using body temperature, known as algor mortis. The body cools at a predictable rate, usually about 1.4°F per hour in the first 12 hours and about 0.7°F per hour after that. However, many factors, such as air temperature, humidity, clothing, and the environment, can affect the rate of cooling. Our tool is designed for scenarios where the environment and other external factors play nearly zero role in the result. The formula for calculating the amount of elapsed time is:

An image showing the formula for estimating how long ago a person passed.
Where:
  • TE = Time elapsed since death

  • BT = Body Temperature

  • AT = Ambient Temperature

Understanding Your Results

The time since death is an estimate based on body and ambient temperature. The result helps provide a rough timeline of when death occurred, which can be valuable in investigations or for understanding circumstances surrounding the death. Always remember this tool is for informational purposes and not a substitute for professional forensic analysis and may not be correct due to external factors.

Limitations of Estimating Time of Death

It is important to recognize that numerous factors influence the cooling rate of a body, including clothing, weather, body mass, and even the surface on which the body is found. Therefore, while temperature is a key indicator, it should be used alongside other evidence for accuracy.

How to Use the Time of Death Calculator

There are just a few steps needed to use our tool, they are as such:

  1. Enter the current temperature of the body.

  2. Enter the current air temperature, if indoors get the temperature within the building and enter that.

  3. Ensure your entries are accurate and that the units of temperature measurement are correct and aligned with your values.

  4. Hit enter and you will instantly get your answer!

Calculation Example

Let's say a body is found in a house. The current body temperature is 77 degrees Fahrenheit and the temperature in the house at that time is 69 degrees Fahrenheit. We can enter these values into the tool and hit calculate to get an estimated time of death to be about 28.8 hours ago, or a total of 1,728 minutes ago.

Time of Death - Frequently Asked Questions

Yes, the temperature of a deceased individual can have a large impact on determining their time of death. External conditions also significantly affect how quickly a body cools.

The closer the body temperature is to the normal living temperature (98.6°F), the closer it is to the time of death. Body temperature drops at a predictable rate after death, and this can help estimate the time elapsed since death.

Typically, it takes about 12 hours for a body to feel cool to the touch and approximately 24 hours to become cold throughout. However, the rate can vary due to environmental factors.

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