The formula is unforgiving and honest: take your cash on hand, divide it by your average monthly burn across the last 3 complete months, and that is how many months you have. CashFish runs this calculation live from approved transactions. An interactive version of the calculator ships on this page soon.

Why it matters

Founders routinely overestimate runway because the burn figure under it is wrong — missed expenses, double-counted revenue, currencies blended into fiction. An optimistic runway number is the most expensive kind of comfort.

What you get

• Runway calculated from your last 3 complete months of burn

• Only approved transactions feed the number — nothing unverified

• 7, 30 and 90-day forecasts show where runway is heading

• Anomaly and leakage alerts catch what quietly shortens it

• Multi-currency handled without merging or double-counting

• Interactive in-page calculator shipping soon

How it works

1. Connect your financial sources in about 2 minutes each, all OAuth. CashFish imports 150 days of history so complete months exist from day one.

2. AI extracts every transaction, dedupes deterministically and recommends categories so your burn baseline is clean.

3. You approve the data, and runway recalculates continuously — alongside your cash health score and forecasts.

Know exactly how long you have, updated every day. Start your 4-day free trial — cancel anytime, full refund guarantee.