Burn Rate & Runway Calculator
Calculate your net monthly cash burn and exact financial survival runway in real time.
1. Enter Company Metrics
2. Live Calculations
Remaining Survival Runway
Burn rate & runway, explained simply
How to figure out your cash runway
Take whatever cash is sitting in your bank account right now and divide it by the money you lose each month. That final number is your countdown—it tells you exactly how many months you've got left before the money runs out and the lights go off.
How do you figure out your net monthly burn?
Net burn is just the speed at which your account balance decreases every 30 days. You calculate it by looking at what you spend versus what you actually pull in from customers: Net Burn = Monthly Expenses - Monthly Revenue (MRR) If you're bringing in more money than you're spending, you've officially beaten the clock. Your burn drops to zero, and your runway becomes infinite.
What is a safe cushion for a UK startup?
Most founders aim to keep at least 12 to 18 months of operating cash tucked away. Having a year or more of breathing room means you aren't making stressful product choices out of pure financial panic. It gives you the time you need to build features, launch growth campaigns, or close your next funding round comfortably.
Why use this tool instead of a spreadsheet?
Spreadsheets work perfectly until a broken cell formula messes up your data right before an investor pitch. We built this calculator to give you instant clarity on your core metrics without forcing you to log into massive accounting software or fiddle with complex templates.