Calculates real runway from your average burn rate trend, not a single good or bad month, so you know your actual months remaining.
Calculating real runway from your tracked burn trend replaces a static one-time estimate with a number that updates as your spending does.
Backed by a 30-day money-back guarantee. If it is not useful, we will refund it, no questions asked.
Founders often don't know their real runway because burn rate isn't tracked against actual monthly cash movement, and a single unusual month (a big one-time expense, a late invoice) can throw off a rough mental estimate. This calculator tracks cash balance, revenue, and expenses monthly, then calculates runway from your average burn rate trend, which smooths out one-off spikes.
Enter your starting cash balance for month 1, then log actual revenue in and total expenses out each month. The sheet calculates your net burn (or gain), ending balance, and running average burn rate automatically. Runway in months remaining divides your current cash balance by your average burn rate, so it reflects your real trend, not a single bad or good month. Update this monthly right after closing your books, so runway is always based on your latest real numbers.
We built this because a single-month burn number is misleading right after a big one-time expense or an unusually strong revenue month. The Avg Burn Rate to Date column exists specifically to smooth out those spikes so runway reflects the real trend founders need to plan around.
— DaveWays
Average burn rate smooths out one-time expense spikes and unusually strong months alike.
Revenue in and expenses out calculate your net burn or gain and ending balance every month.
Update it right after closing your books so runway always reflects your latest real numbers.
Does this account for expected future funding?
No, it calculates runway from current cash and trailing burn rate only; add a projected funding date as a separate note if you want to plan around it, but the runway number itself reflects cash on hand.
How far back does the average burn rate look?
It averages across all logged months to date by default; for a shorter-term view, you can reference just the most recent 3-6 months of the Net Burn column directly.
What if I have irregular revenue from multiple sources?
Log total revenue in for the month as a single combined figure; the calculation doesn't require breaking out revenue by source.
Startup Runway & Burn Rate Calculator (Free Preview) — download a condensed version free, no purchase required, to see if it's a fit before you buy.
Startup Runway & Burn Rate Calculator is $16.99 USD, one-time payment, instant delivery, no subscription. Covered by our 30-day money-back guarantee. See our refund policy and terms.
