Raw onions are very low in calories, with only 40 calories per 3.5 ounces (100 grams). By fresh weight, they are 89% water, 9% carbs, and 1.7% fiber, with tiny amounts of protein and fat. after frying, the water in the onion will leave. So we can get very little fried onion from fresh onion.
Fried Onions or French Fried onions are a popular snack food, garnish or vegetable accompaniment to various recipes. (15：1）
Crisp Fried Onions is frying in much higher temperature and immersive, deep frying is used, this prepares the onions in a manner similar to that of French fried potatoes. Smaller and irregularly shaped (from being deep-fried until they are crunchy) onions are an integral part of the American dish Green bean casserole. Freshly made crisp fried onions may be used as garnishes in some restaurants. (fresh onion to fries onion crisp ratio: 20:1)
Ring Shaped Batter Coated Deep-fried Onions are often associated with fast food and casual dining. Examples include onion rings and blooming onion. Also used in biriyani for layering and garnishing. (fresh onion to fries batted onion ring ratio: 10:1)