Business Calculators
Startup Runway Calculator
Calculate how many months of runway a cash balance provides at your current burn, and what raising more buys you.
Runway
13 months
- Net monthly burn
- $67,000.00
- Runway after raise
- 36 months
- Months to zero cash
- 13 months
How this calculator works
Runway = cash ÷ (burn − revenue)
- net burn
- cash out less cash in each month
Example calculation
Illustrative example — not advice
Worked example — the startup runway calculator as it loads, using the default figures below.
- 01Enter cash in the bank: $900,000.
- 02Enter gross monthly burn: $95,000.
- 03Enter monthly revenue: $28,000.
- 04Enter planned raise: $1,500,000.
- 05Read the runway from the results panel: 13 months.
Runway: 13 months. Net monthly burn: $67,000.00. Runway after raise: 36 months. Months to zero cash: 13 months.
These figures come straight from the calculator above running on the values listed, so you can retype them and confirm every number yourself. Change any input and the results update immediately. Illustrative only — not a quote, offer or recommendation.
Important considerations
- Raising takes months — start well before the runway runs short.
- Growing revenue extends runway more durably than cutting costs alone.
Related calculators
- Cash Flow CalculatorMonthly cash flow and runway.
- Break-Even CalculatorUnits and revenue needed to break even.
- Business Loan Payment CalculatorBusiness borrowing repayments and total cost.
- Employee Cost CalculatorThe fully loaded annual cost of a hire.
- Business Loan CalculatorRepayments and total cost on a business term loan.
- Profit Margin CalculatorGross, operating and net margin from your numbers.
Terms used here
Frequently asked questions
How much runway is comfortable?
Eighteen to twenty-four months is a common target, since it covers a full fundraising cycle plus slippage.
Disclaimer
Legamoney calculators are educational tools. Results are estimates based on the figures you enter and do not constitute financial, tax or legal advice.
Last reviewed 2026-08-01