Startup Runway Calculator
Calculates how many months of cash a startup has left based on current balance, monthly burn, and expected revenue growth.
| Month | Net Burn | Revenue | Ending Cash |
|---|
How to Use This Tool
- 1 Enter your total current cash on hand across all business bank accounts.
- 2 Enter your gross monthly burn rate (total operational expenses).
- 3 Optionally enter your current monthly revenue to determine net burn.
- 4 Optionally set an expected monthly revenue growth rate to forecast extending runway.
- 5 Inspect your remaining runway in months, your exact projected cash-out date, and month-by-month trajectory.
How Runway Governs Founder Autonomy
Runway is the single number that determines how much freedom a founder has. It is not complicated math, but people get it wrong in two common ways: they calculate it once and never touch it again, or they ignore revenue growth entirely and assume burn stays flat.
Runway equals cash on hand divided by net monthly burn, where net burn is your spending minus whatever revenue is coming in. If revenue is growing, net burn shrinks over time, and runway stretches further than the first month math would suggest. If burn is growing faster than revenue, the opposite happens, and the cash out date arrives sooner than expected.
The point of tracking runway monthly rather than calculating it once is that it changes your decisions in real time: below six months of runway, most experienced operators start cutting costs or raising, rather than waiting for the number to hit zero.