Can agents run this deterministically?

Yes. Supply cash_on_hand, monthly_burn, monthly_revenue, revenue_growth_pct, and burn_reduction_pct as JSON and receive runway_months, default_date, break_even_month deterministically.

Startup Money Math

Startup Runway Calculator

Calculate how many months your startup can operate before running out of cash, with revenue growth and burn reduction scenarios.

Runway

Months of runway: 8
Cash-out date: Dec 2026
Net monthly burn (M1): $20,000

Cash Projection

130,000

110,250

90,763

71,551

52,628

34,010

15,710

-2,254

Projections assume constant growth/reduction rates and do not account for one-off expenses, fundraising, or seasonal variation. For informational purposes only — not financial advice.

How to use it

Enter cash on hand, monthly burn, current monthly revenue, expected monthly revenue growth, and any planned burn reduction. Use fully loaded burn including payroll, software, rent, and debt service so runway reflects real cash usage.
Read runway months, projected cash-out date, monthly cash projection, and break-even month. Fewer than 6 months of runway is usually acute, while 12-18 months gives most startups a healthier fundraising or restructuring window.
Compare break-even month to cash-out month, not just to your optimism about growth. If break-even arrives after cash reaches zero, the current plan still fails even if the top-line narrative sounds attractive.
Use the projection to test a no-growth case, a modest growth case, and a burn-cut case before making hiring or fundraising decisions. If a 10% burn reduction adds more runway than an aggressive growth assumption, the operations lever is probably safer than the sales story.
Re-run monthly after the close and after any staffing, pricing, or financing change. Track actual runway versus modeled runway because even one or two bad months can pull the cash-out date forward sharply.

AI Integrations

Contract, discovery endpoints, and developer notes for agent use.

Always available for agents

Tool contract JSON

https://aibizhub.io/contracts/startup-runway-calculator.json

Stable input and output contract for this exact tool.

Human review

People can use the browser page to sense-check outputs and charts, but agents should still execute against the contract and discovery endpoints.

/agent-tools.json - machine-readable tool index.
/llms.txt - human-readable model discovery guide.
/.well-known/webmcp.json - WebMCP capabilities manifest.
/.well-known/ai-plugin.json - plugin-style discovery manifest.

{
  "tool": "startup_runway",
  "cash_on_hand": 150000,
  "monthly_burn": 25000,
  "monthly_revenue": 5000,
  "revenue_growth_pct": 5,
  "burn_reduction_pct": 0
}

Open tool contract JSON Open AI integrations guide

Expand developer notes

Agent playbook

Resolve Startup Runway Calculator from /agent-tools.json and open its contract before execution.
Validate inputs against the contract schema instead of scraping labels from the page UI.
Open the browser page only when a person wants to review charts, assumptions, or related tools.

Agent FAQ

Should ChatGPT, Claude, or another agent click through the UI?

No. Start with /agent-tools.json, then follow the tool's contract URL. The page UI is for human review, not parameter discovery.

When do tools show Quick and Advanced?

Every tool opens in Quick Start first. Advanced Controls keeps the same scenario, reveals more assumptions or diagnostics, and every tool keeps AI integrations inline below the instructions.

When should an agent still open the browser page?

Open it when a human wants to sense-check the output, review the chart, or keep exploring related tools after the calculation finishes.

Questions people usually ask

What is startup runway?

Runway is the number of months your startup can continue operating at its current burn rate before cash reaches zero.

How is revenue growth modelled?

Revenue compounds monthly at your specified growth rate. A 5% monthly growth means revenue multiplies by 1.05 each month.

What if my burn rate changes?

Use the burn reduction percentage to model decreasing costs over time. Set to 0% for constant burn.

Is this tool free and private to use?

Yes. AI Biz Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.

Related Resources

Learn the decision before you act

Every link here is tied directly to Startup Runway Calculator. Use the explanation, formula, examples, and benchmarks to pressure-test the calculator output from first principles.

Browse all 35 resources

Guides · 2 Checklists · 2 Comparisons · 3 Learn · 2 Tips · 5

How To Use

3 STEPS

How to Use Burn Multiple Calculator

Evaluate startup capital efficiency by comparing net burn to net new ARR. Learn what your burn multiple means and how to improve it.

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4 STEPS

How to Use Dilution Calculator

Model founder equity dilution across multiple funding rounds. See how each round's investment and valuation affects your ownership percentage over time.

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4 STEPS

How to Use Monthly Burn Rate Calculator

Calculate gross and net monthly burn rate, runway in months, and spending breakdown by category to manage startup cash flow effectively.

Read

How To Use

3 STEPS

How to Use Startup Cost Estimator

Estimate total startup costs by categorizing one-time and recurring expenses. See first-year totals and cost breakdowns to plan your initial funding needs.

Read

How To Use

6 STEPS

How to Use Break-Even Units Calculator

Quickly find out how many units your business needs to sell to cover all costs. This calculator is vital for pricing, product viability, and strategic profit planning.

Read

How To Use

6 STEPS

How to Use Business Valuation Calculator

reveal your business's true worth. This guide helps entrepreneurs, buyers, and sellers use the Business Valuation Calculator to estimate company value for sales, acquisitions, or strategic planning.

Read