Time Of Death Calculator

When a person passes away, their body ceases metabolic heat production and begins cooling to match the temperature of the surrounding environment, a process known as algor mortis. The fundamental formula used to estimate the elapsed time since death is: Death = (98.6 - BodyTemperature) / CoolingRate, where 98.6°F represents the standard normal human baseline temperature. The cooling rate variable depends heavily on ambient conditions, clothing, and body mass, though standard models utilize an hourly temperature drop factor to determine how many hours have passed.

Imagine a forensic investigator arrives at a scene where the ambient room temperature is a constant 70°F. Upon examination, the victim's core body temperature is measured at 84.6°F. Assuming a standard cooling rate adjustment of 1.4°F per hour under typical conditions, we apply the formula: Death = (98.6 - 84.6) / 1.4. First, subtract the body temperature from the normal baseline: 98.6 - 84.6 = 14.0°F of heat lost. Next, divide by the hourly cooling rate: 14.0 / 1.4 = 10 hours. Therefore, the estimated time of death is approximately 10 hours prior to the temperature measurement.

Keep in mind that temperature-based postmortem calculations are estimates rather than exact timestamps. Environmental variables such as heavy insulation, extreme weather, water immersion, or underlying fevers at the moment of death can significantly skew cooling rates. Always use internal core temperature readings (such as rectal or liver probes) rather than surface skin measurements for the highest possible accuracy.