HOMEOWNERS PROFESSIONALS COMMERCIAL RESOURCES United States TANK SIZE CALCULATOR THE TRUTH ON PROPER TANK SIZES AND ACTUAL GALLONS VS. NOMINAL GALLONS When ordering a storage tank, manufacturers often give you nominal gallons, which normally include the space on the elliptical heads as storage area. Please be aware that many manufacturers often claim that for example, a 42" diameter x 85" OAL tank holds 504 gallons, when in reality it only holds 460 actual gallons. The below calculator will give you a true calculation for choosing a proper tank size for your needs. Specifications SUBMIT HOMEOWNER TOOLS Find a Contractor Knowledge Center Warranty Center Product Rebates Product Documentation Contact Us PROFESSIONAL TOOLS For The Pro® RightSpec® Tools Technical Training Warranty Center List Your Business Specs, Manuals, Parts Rep Locator PRODUCTS Commercial Line United States Canada International Specs, Manuals, Parts Innovations QUICK LINKS Find a Contractor Warranty Center List Your Business For The Pro® RepConnect® Contact Us DisclaimersAbout UsContact UsPrivacy PolicyCareers Bradford White is an American company with its manufacturing facilities located in the United States of America. Products made by Bradford White are manufactured in the United States using the finest raw materials and components from around the world to deliver the highest quality and value to our customers. Bradford White is American Strong™. ©2021, Bradford White Corporation, USA. All rights reserved. Find a Contractor You accept the use of cookies as described in our Privacy Policy OK