Cash Runway Calculator
Estimate how many months your business can operate before running out of cash, based on current balance and burn rate.
Your results
Calculation breakdown
- Runway (months)
- Cash balance ÷ Monthly net burn
Worked example
A startup with $80,000 in the bank and a $10,000 monthly net burn has about 8 months of runway left at that pace.
Assumptions
- Monthly burn should be an average of recent months, not a single unusual month.
- This assumes burn stays constant, which real businesses rarely do exactly.
- Review runway monthly as revenue and costs change.
How this calculator works
Divide your available cash balance by your average monthly net cash outflow to see how many months of runway remain at the current burn rate. Useful for startups and businesses managing tight cash flow.
Frequently asked questions
What is burn rate?
Burn rate is the net amount of cash your business spends each month after accounting for any incoming revenue.
What if my business is cash-flow positive?
If monthly net burn is zero or negative, runway is effectively unlimited — the calculator will flag this rather than show a false figure.
How often should I recalculate runway?
Recalculate monthly using updated cash balance and burn rate, since both can change quickly in a growing or contracting business.
Results are estimates only and are not financial, tax, legal or credit advice.