May 06, 2019 · Towing Capacity Calculator Tips. You will only edit the fields in orange. The other fields will automatically populate based on the numbers you enter in those fields. If you make a mistake, and would like to reset the calculator, just refresh the page. When calculating loaded tongue weight, enter 10%-15% if you are towing a travel trailer. We provide free web based RV calculator apps as well as mobile device apps. FWS assists all RV travelers, including truck camper owners, all who tow fifth wheel or gooseneck trailers, and conventional trailers such as bumper pull travel trailers, boat trailers, and utility trailers, as well as motorcoaches towing a car or trailer.
Our online calculator only requires three pieces of information: the length, the width and the depth of your coverage area. Generally speaking, a fair number of projects involving crushed or decorative stone require a minimum depth of 2-3″, but there are exceptions to the rule.