Use our Space Planning Calculator to help you choose. Design your event below to get a recommended event space or tent size. First tell us how many guests you will have and how you wish to use the space. That's all we need to suggest how big your event space or suggest a tent size for your event. If you know more details about your event, you can add buffets, bars, lounge furniture, dance floors and more. You'll find the calculated square footage button at the bottom of the page that will tell you the minimum size space or tent you need.