Runway calculator.

Calculate how long your cash lasts given current burn — down to the day. Includes recommended fundraise-start dates so you don’t run out of options.

Why runway is the metric that matters.

Cash determines what’s possible. Knowing your zero-cash date — and the date you need to start fundraising — turns vague anxiety into specific timing.

  1. 01
    Know your zero-cash date with weekly and daily precision, not just months.
  2. 02
    Time your fundraise — most rounds take 4–6 months to close.
  3. 03
    Compare runway against industry benchmarks for your stage.
  4. 04
    Identify when to cut burn vs. when to grow into runway.

Calculate your runway.

Total cash in the bank right now.

Net cash spent each month (expenses − revenue).

Common mistakes.

  1. 01
    Not starting fundraising early enough (typical raise takes 4-6 months)
  2. 02
    Being overly optimistic about burn rate reduction
  3. 03
    Not planning for seasonal fluctuations in revenue/expenses
  4. 04
    Ignoring upcoming large expenses (tax payments, equipment, etc.)
  5. 05
    Not having a Plan B if fundraising fails or takes longer
  6. 06
    Waiting until runway is critical to take action

How to extend runway.

  1. 01
    Cut all non-essential expenses (nice-to-haves, perks, unused subscriptions)
  2. 02
    Freeze hiring or reduce headcount if necessary
  3. 03
    Negotiate payment terms with vendors (extend to net-60 or net-90)
  4. 04
    Accelerate receivables - offer discounts for immediate payment
  5. 05
    Consider revenue-based financing or venture debt
  6. 06
    Reduce office space or go fully remote
  7. 07
    Delay non-critical projects and initiatives
  8. 08
    Focus 100% of resources on revenue-generating activities

More startup calculators.

  1. Burn rate calculator

    Calculate gross and net burn, and time to profitability.

  2. MRR calculator

    Track Monthly Recurring Revenue, growth rate, Quick Ratio.

  3. Cash flow calculator

    Project month-by-month cash position with revenue + expense scenarios.

  4. All business tools

    The complete collection of free calculators.

Need to ship product before runway runs out?

I build product fast — Next.js + TypeScript, weeks not months. The cheapest way to add runway is to ship something that earns.

Email me