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Runway Extension Calculator

Estimate runway, burn after savings, and runway extension from new capital.

Runway Extension Calculator

Estimate current runway and how savings or new capital extend it.

Enter your cash plan

Formula

Burn after savings = max(0, monthly burn − monthly savings).

Current runway (months) = cash balance ÷ burn after savings.

Adjusted runway (months) = (cash balance + new funding) ÷ burn after savings.

Extension (months) = adjusted runway − current runway.

Steps

  • Enter current cash balance available for operations.
  • Enter current monthly burn (net cash outflow).
  • Add planned monthly savings or efficiency gains (optional).
  • Add new capital injection expected (optional).
  • Review current runway, extended runway, and savings impact.

Additional calculations

Enter burn, savings, and funding to see runway extension.

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Runway Extension Playbook

Calculate how long your cash lasts, how savings shift your burn, and how new capital or revenue adds months of runway.

Table of Contents

Runway and Burn Basics

Runway is months of cash coverage at the current burn. Use net burn after revenue, debt, and working capital needs to avoid overestimating runway.

Track both gross burn (total spend) and net burn (spend minus revenue collections) to understand true cash usage.

Savings and Efficiency Wins

Small recurring savings compound. Focus on vendor renegotiations, hiring pacing, and cloud/unit cost controls.

  • Renegotiate contracts and remove unused seats.
  • Delay non-critical hiring; prioritize revenue-facing roles.
  • Measure unit economics to prevent growth that burns cash.

Modeling New Capital

When adding new funding, include transaction costs and timeline uncertainty. Use conservative close dates and partial funding scenarios for realism.

Buffer Targets and Risk

Maintain at least 6 months of runway buffer to absorb slippage in sales cycles or hiring ramp. Stress test downside scenarios with slower revenue and higher churn.

Cadence for Reforecasting

Refresh runway monthly and after major commitments. Reconcile plan vs. actuals to keep LCP low and decision-making fast.

FAQs

What is runway?

Runway is the number of months your current cash lasts at the present burn rate.

How do savings affect runway?

Lower burn (through savings or revenue) increases runway. Even small cuts compound over time.

Should I include deferred expenses?

Yes. Use a net burn that includes all recurring expenses, debt service, and working capital changes.

What is a healthy runway target?

Early-stage companies often target 12–18 months to allow for learning cycles and a buffer for fundraising.

How often should I recalc runway?

Monthly is typical. Recalculate sooner after major hiring, pricing changes, or capital raises.

Summary

Estimate current runway, burn after savings, and runway extension from new capital.

Outputs include current and adjusted runway, burn after savings, extension, status, recommendations, and an action plan.

Formula, steps, guide content, related tools, and FAQs mirror the Vitamin K layout for consistency.

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Runway Extension Calculator

Estimate runway, burn after savings, and runway extension from new capital.

How to use Runway Extension Calculator

Step-by-step guide to using the Runway Extension Calculator:

  1. Enter your values. Input the required values in the calculator form
  2. Calculate. The calculator will automatically compute and display your results
  3. Review results. Review the calculated results and any additional information provided

Frequently asked questions

How do I use the Runway Extension Calculator?

Simply enter your values in the input fields and the calculator will automatically compute the results. The Runway Extension Calculator is designed to be user-friendly and provide instant calculations.

Is the Runway Extension Calculator free to use?

Yes, the Runway Extension Calculator is completely free to use. No registration or payment is required.

Can I use this calculator on mobile devices?

Yes, the Runway Extension Calculator is fully responsive and works perfectly on mobile phones, tablets, and desktop computers.

Are the results from Runway Extension Calculator accurate?

Yes, our calculators use standard formulas and are regularly tested for accuracy. However, results should be used for informational purposes and not as a substitute for professional advice.