An electric oven has an average life expectancy of 13 years, and a gas oven can usually last up to 15 years. However, this is an estimate and it will wear out quicker if you use the appliance more often. Using an oven daily will cut its life expectancy, while only using it a few times a week or less should prolong an oven’s life expectancy. The make of the oven can also play a role in its longevity.