Startup runway calculator
See how many months your cash lasts.
Add revenue growth to find your break even month.
How it works
- The plan runs 24 months. Month 1 is this month.
- Net burn is spending minus revenue.
- Revenue grows by your monthly rate from month 2.
- Spending stays the same each month.
- Put your cost of sales in spending.
- Cash each month is last month's cash minus net burn.
- Runway is the full months before cash goes below zero.
- Break even is the first month revenue covers spending.
- Runway counts no raise. The raise gets its own line.
- A raise adds its amount in the month it lands.
Questions founders ask
What is startup runway?
Runway is how many months your cash lasts. Each month, net burn comes out of the bank.
What is the difference between burn and net burn?
Burn is everything you spend in a month. Net burn is spending minus revenue. Runway uses net burn.
How does revenue growth change my runway?
Growing revenue makes net burn smaller each month. When revenue covers spending, you break even. From then on, cash stops falling.
Is this runway calculator free?
Yes. It runs in your browser with no sign-up. Sign up only if you want to save it.