Calculate homicide rates, homicide counts, or population using rates per 1,000 to 1,000,000 people, with optional partial-year annualization.

Divide the observed count by the corresponding population.

Use matching geography, period and homicide definitions. This is a crude population rate; small counts can be unstable.

Rate base and time basis

Changing this base reinterprets an entered rate; use a rate with the matching base.

Homicide Rate Formula

HR = H / P × 100000

Variables:

  • HR is the Homicide Rate (homicides per 100,000 people)
  • H is the number of homicides
  • P is the total population

To calculate the rate per 100,000 people, divide the homicide count by the matching population, then multiply by 100,000. Other bases are selectable. Partial-year annualization multiplies by 12 divided by months observed and assumes a constant rate; it is not a forecast.

How to Calculate Homicide Rate?

The following steps outline how to calculate the Homicide Rate.

  1. First, determine the number of homicides. 
  2. Next, determine the total population. 
  3. Next, gather the formula from above: HR = H / P * 100000.
  4. Finally, calculate the Homicide Rate.
  5. After inserting the variables and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

number of homicides = 5

total population = 200000; rate = 5 / 200000 * 100000 = 2.5 per 100,000 for the stated period.

Frequently Asked Questions

What is considered a high homicide rate?
There is no universal high-rate threshold used by this calculator. Compare rates only with consistent definitions, geography, coverage and periods; small counts can cause large rate changes.

How does the homicide rate affect a community?
High homicide rates can lead to increased fear among residents, reduce quality of life, and can negatively impact economic development by deterring investment and tourism. They also put a strain on local law enforcement and healthcare systems.

What factors contribute to a high homicide rate?
Factors can include economic disparity, lack of education and employment opportunities, political instability, ineffective law enforcement, cultural norms, and the availability of firearms.

How can communities work to reduce their homicide rates?
Strategies may include improving economic conditions, investing in education and youth programs, enhancing policing tactics and community policing efforts, implementing gun control measures, and fostering community engagement and cohesion.