Someone would be 46 if they had already had their birthday or 45 if they hadn't reached their birthday.
Age at death is calculated by subtracting the birth year from the death year. Depending on whether the person's birthday had occurred in their final year, the result may be off by one year. For a more precise calculation, the exact birth date and death date are needed.
Calculating age at death is commonly used in genealogy research to understand an ancestor's lifespan, in historical studies to compare life expectancies across eras, and when filling out official death records or memorial materials when only the birth and death years are known.
Global average life expectancy is approximately 73 years as of recent data. However, this varies dramatically by country, gender, and socioeconomic factors. Women typically live about five years longer than men on average, and life expectancy in high-income countries can exceed 80 years.
A calculation based only on birth year and death year is accurate to within one year. If the person's birthday had not yet occurred in their final calendar year, their actual age at death was one year less than the simple subtraction suggests.
Yes, this calculator is ideal for genealogy research. When you find a birth year and death year in a family record, church register, or census document, you can quickly calculate how old your ancestor was when they died, giving you insight into their lifespan and the era they lived in.