How can I calculate the feasibility of a new business idea without spending a lot of money?

I totally get it - you want to test the waters without sinking a lot of money into your business idea. I'd recommend starting with a simple SWOT analysis. This involves listing your business idea's strengths, weaknesses, opportunities, and threats. You can do this all on your own, just by thinking through your idea and jotting down notes. Make a list of what's working in your favor and what's not, and what potential opportunities and challenges you see.

Next, try to validate your idea by talking to people who might be interested in it. Ask potential customers for their feedback and see if they'd actually pay for your product or service. You can also try to find similar businesses in your area and see how they're doing. This can give you a sense of whether there's a market for your idea, and whether you'd be able to compete.

One resource that can help you get started with minimal upfront costs is Google Trends. You can use it to see how much interest there is in your business idea, and whether it's a topic that people are searching for online. You can also use tools like SurveyMonkey to create simple surveys and ask people about their opinions on your idea. These tools are free or low-cost, and can give you a lot of valuable information.

Lastly, don't be afraid to test your idea in a small way before committing to a big launch. Try selling your product or service at a local market or event, or even just offering it to friends and family to get feedback. This can help you work out any kinks and get a sense of whether your idea is actually viable. Good luck, and I hope this helps!