--- title: How do you determine watts for a motor? Is there a formula for calculating watts? description: You can figure out watts on a DC motor by multiplying volts and amps. --- [Skip to content](https://help.gibraltarbuildingproducts.com/migration/en/knowledge/how-do-you-determine-amps-and-watts#main-content) English Show submenu for translations ![GBAD Full Color.png\]](https://help.gibraltarbuildingproducts.com/hs-fs/hubfs/GBAD%20Full%20Color.png?height=40&name=GBAD%20Full%20Color.png) - [Default HubSpot Blog](https://semetals-1971711.hs-sites.com/blog) Open main navigation Close main navigation - [Default HubSpot Blog](https://semetals-1971711.hs-sites.com/blog) - English Show submenu for translations - Go to www.gibraltarbuildingproducts.com Go to www.gibraltarbuildingproducts.com Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Help Center](https://help.gibraltarbuildingproducts.com/migration/en/knowledge?hsLang=en) 2. 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Is there a formula for calculating watts? ## You can figure out watts on a DC power by multiplying volts and amps. You can figure out watts on a DC motor by multiplying volts and amps. On AC power you can only measure it with a watt meter that is calibrated to measure true RMS watts. Some appliance watt meters on the market only read the power in DC style, but true RMS readings will be lower as they actually measure the power being consumed. - [Default HubSpot Blog](https://semetals-1971711.hs-sites.com/blog) [![Gibraltar Building Accessories Logo](https://help.gibraltarbuildingproducts.com/hs-fs/hubfs/GBAD.jpg?width=2500&height=777&name=GBAD.jpg "Gibraltar Building Accessories Logo")](https://www.gibraltarbuildingproducts.com/) www.gibraltarbuildingproducts.com Help Center Copyright © 2026, Gibraltar Building Accessories Division