Runway
For complete information, see Newchip.
You can also work to reduce your net burn rate to give yourself more runway. For example, you can outsource a role or department, or hire interns to help with development efforts. You can also utilize stock to negotiate salaries down for every current and future employee.
Here are a few tools and resources that you can check out to help you with calculating runway:
https://founderscpa.com/calculating-burn-rate-runway-startups/
https://pilot.com/blog/burn-rate-calculation-startup-runway-calculator/