Finance / Startup

Runway & Burn Rate Calculator

See how many months of cash you have left, and how growth or cost cuts change your runway.

Cash on hand$500,000

Monthly burn$45,000/mo

Monthly revenue growth+$3,000/mo

Runway

60+ mo

at current burn, with revenue growth

Projected over time

Start60 periods

How the formula works

Runway is simply cash on hand ÷ net monthly burn, where net burn is spending minus revenue. As revenue grows, net burn shrinks each month — this calculator recomputes the balance month-by-month rather than assuming a flat rate, so runway extends automatically once growth outpaces burn.

Example: pre-seed startup

$400K raised, $28K/mo burn, no revenue yet → ~14 months runway.

Example: Series A, growing

$3M raised, $180K/mo burn, +$15K/mo revenue growth → runway extends well past the naive estimate.

FAQ

What's a healthy runway?

Most investors like to see 12–18 months at minimum between raises.

Does this account for revenue growth?

Yes — the projection compounds monthly revenue growth against burn, rather than assuming a static monthly loss.

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