Free tool

Startup Burn Rate & Runway Calculator

Calculate your monthly net burn, runway in months, and projected cash-out date from your cash balance and spend.

Interactive

Runway calculator

Cash on hand

Net monthly burn

Enter your cash on hand and net monthly burn to see how many months of runway you have.

Estimate only. Assumes a flat burn rate; real runway shifts with revenue and spend changes.

Want the full mechanics, edge cases, and 2026 rules behind this tool?

Read the full guide: Burn Rate and Runway: A Founder's Primer→

This tool gives an estimate for planning only — not tax advice. Acorn 9 is a tax & accounting firm built for startups; the actual numbers on your return are prepared and signed by a licensed CPA. See all tools.