How much does your record fish weigh? With a proper scale you can be certain of the weight of your record catch. Fish weighing scales can be divided into digital and mechanical scales. In recent years, digital scales have gained more of a foothold from typical spring scales. A digital fishing scale allows you to weigh your catch to the nearest 10 grams up to 50 kilograms. Also remember the weighing slings and release mats that make weighing easier and are essential for catch and release fishing.