Free tool
A runway calculator. Put in what you have, what goes out and what comes in, and see the month the money runs out — and what spending a little less buys you.
With $10,000 and $2,000 a month going out, your money lasts about 5 months.
It runs in your browser. Nothing you type is sent anywhere or stored; the numbers live only in the page address.
If income covers spending, the burn is zero or less and the money does not run out at that rate. The calculator assumes both stay level; real months are lumpier, which is what tracking them is for.
Example
$9,000 saved and $2,600 a month in spending. Invoices over the last twelve months came to $16,800 — $1,400 a month on average, though single months ran from $0 to $4,200.
Example
€8,000 in a euro account and £3,000 in a UK one, €2,200 a month to live in Lisbon, and a €1,200 deposit on a new flat due next month. Convert the pounds at the day’s rate: at £1 = €1.17 — an example rate, check today’s — £3,000 is €3,510, so €11,510 in all.
Take what you spend a month, subtract any income, and divide the money you have by the rest. $12,000 with $2,000 going out and $500 coming in a month lasts 12,000 ÷ 1,500 = 8 months. The calculator does the same and also gives the date.
The time until the money runs out if nothing changes. Startups use the word for their cash; it works the same for a household, a freelancer between contracts or someone taking time off.
Use the average of the last 6 to 12 months, not your best month. If income swings a lot, run the calculator once more with no income at all: that is your worst case, and the honest number to plan around.
Convert everything into the currency you spend in at today's rate and add it up. Rates move, so leave some margin and run it again when they change a lot.
No. The calculator runs in your browser and sends nothing to a server. The numbers sit only in the page address, so a link you copy opens on them.