Fish, mackerel, salted: piece (5-1/2" x 1-1/2" x 1/2") to Grams
Quick answer
One piece (5-1/2" x 1-1/2" x 1/2") of fish, mackerel, salted weighs 80 grams.
1 piece (5-1/2" x 1-1/2" x 1/2")80 g
Reference serving (nutrition facts)100 g
Source: USDA FoodData Central - SR Legacy (2018-04) (USDA household portion weight)