Indie app runway calculator
See how many months your cash covers, from the revenue and costs you already track. Inputs stay in this browser tab and are never sent to SwingCodeLab.
Free planning tool
Runway calculator
Enter the cash you have set aside for your products, plus what they currently earn and cost per month. All figures are in USD and stay in your browser. Refreshing the page resets the inputs.
This projection treats your cash as the balance at the start of the current UTC month. The starting month is fixed when this page opens, using UTC. Each row applies a full month of the entered revenue and costs. It does not prorate the current month or account for payment dates within a month.
Monthly projection
Your runway picture
| Month | Projected cash at month end |
|---|---|
| Month 1 | $3,670 |
| Month 2 | $3,340 |
| Month 3 | $3,010 |
| Month 4 | $2,680 |
| Month 5 | $2,350 |
| Month 6 | $2,020 |
| Month 7 | $1,690 |
| Month 8 | $1,360 |
| Month 9 | $1,030 |
| Month 10 | $700 |
| Month 11 | $370 |
| Month 12 | $40 |
Showing the first 12 months. At the current net change, the cash lasts about 12.1 months.
What this calculation means
Runway here means the cash you set aside divided by your net monthly burn—monthly costs minus monthly revenue. It assumes both figures stay exactly as entered. This is a projection under fixed assumptions, not a prediction of actual cash balances. It does not connect to your bank or account for costs you have not entered. It is not accounting, tax, or financial advice.
Continue the work in MarginDeck.
This calculator is designed for a quick scenario. For recorded revenue, scheduled costs, upcoming charges, and a cash runway that follows your real numbers month by month, MarginDeck brings the same question into a local-first Mac app.
MarginDeck is built by Junhua Jin.