Burn rate calculator.

Calculate your startup’s runway, track cash burn, forecast profitability, and figure out when to start fundraising based on your current cash and expenses.

Why track burn rate and runway.

Burn rate and runway are critical metrics for startup survival. Most startups fail because they run out of cash — knowing the timing helps you avoid that.

  1. 01
    Calculate exactly how many months until you run out of cash.
  2. 02
    Know when to start fundraising — most rounds take 6–9 months to close.
  3. 03
    Forecast when you’ll reach profitability based on your revenue growth.

Calculate your runway.

Total cash in the bank right now

Your average monthly revenue

Total monthly operating expenses (payroll, hosting, etc.)

Monthly revenue growth % (e.g., 10 for 10% MoM growth)

Understanding runway.

  1. 01
    18+ months:Safe. Focus on growth and product without immediate fundraising pressure.
  2. 02
    12–18 months:Comfortable. Start planning your next round if you intend to raise.
  3. 03
    6–12 months:Warning. Begin fundraising now — it typically takes 6 months to close a round.
  4. 04
    < 6 months:Critical. Cut costs drastically and start emergency fundraising today.

How to extend your runway.

  1. 01
    Cut non-essential spend.Audit subscriptions, defer nice-to-have hires, renegotiate vendor contracts.
  2. 02
    Accelerate revenue.Upsell existing customers, shorten sales cycles, push annual contracts with discounts.
  3. 03
    Reduce churn.Every retained customer is one you don’t need to acquire — and cheaper than acquisition.
  4. 04
    Bridge financing.Talk to existing investors about a bridge round if the next priced round is months away.

More startup calculators.

  1. MRR calculator

    Track Monthly Recurring Revenue, growth rate, and Quick Ratio.

  2. LTV:CAC ratio calculator

    Customer Lifetime Value to Acquisition Cost — essential SaaS unit economics.

  3. Cash flow calculator

    Forecast cash position month-by-month with revenue and expense scenarios.

  4. All business tools

    The complete collection of free calculators for startups, SaaS, and freelancers.

Need to build the product before you run out of cash?

Runway is short when you can’t ship. I build MVPs, SaaS products, and production web apps fast — Next.js + TypeScript, no agency overhead.

Email me

Built by Taro Schenker.