Cooking time for salmon depends on several factors, including the thickness of the fillet or steak and the temperature of the oven, but a good rule of thumb is to cook it for about 5 minutes per half-inch of thickness. As salmon fillets tend to not be of uniform thickness, the fillet should be measured from the thickest part of the salmon.
When baking salmon, the oven's cooking temperature should be set at 425 degrees Fahrenheit. Using a higher or lower temperature will alter the cooking time. Cooking time will also depend on the desired level of doneness as some people prefer their salmon to be more moist on the inside while others prefer well done cooking throughout.