Runway calculator.
Model your cash runway, monthly burn, and cash buffer. See how changes in revenue and expenses affect the next 36 months.
No account. No email. Your inputs stay in this page.Refreshing or leaving the page clears your work.
Start with your cash.
Use cash you can spend today and a realistic monthly operating picture.
All money amounts are in US dollars (USD).
- Time until zero cash
- 10 months Includes a partial final month
- Time until cash buffer
- 8 months Your buffer: $30,000
- Starting net burn / month
- $15,000 Monthly expenses less revenue
How your cash changes
ILLUSTRATIVE MODELMonths from today · Receipts and payments follow your monthly assumptions.
At these assumptions, cash reaches zero in 10 months. Use the buffer as an earlier decision point for reducing costs, increasing revenue, or arranging funding.
View the monthly cash projection
| Month | Revenue | Expenses | Ending cash |
|---|---|---|---|
| Starting cash | — | — | $150,000 |
| 1 | $20,000 | $35,000 | $135,000 |
| 2 | $20,000 | $35,000 | $120,000 |
| 3 | $20,000 | $35,000 | $105,000 |
| 4 | $20,000 | $35,000 | $90,000 |
| 5 | $20,000 | $35,000 | $75,000 |
| 6 | $20,000 | $35,000 | $60,000 |
| 7 | $20,000 | $35,000 | $45,000 |
| 8 | $20,000 | $35,000 | $30,000 |
| 9 | $20,000 | $35,000 | $15,000 |
| 10 | $20,000 | $35,000 | $0 |
| 11 | $20,000 | $35,000 | -$15,000 |
| 12 | $20,000 | $35,000 | -$30,000 |
| 13 | $20,000 | $35,000 | -$45,000 |
| 14 | $20,000 | $35,000 | -$60,000 |
| 15 | $20,000 | $35,000 | -$75,000 |
| 16 | $20,000 | $35,000 | -$90,000 |
| 17 | $20,000 | $35,000 | -$105,000 |
| 18 | $20,000 | $35,000 | -$120,000 |
| 19 | $20,000 | $35,000 | -$135,000 |
| 20 | $20,000 | $35,000 | -$150,000 |
| 21 | $20,000 | $35,000 | -$165,000 |
| 22 | $20,000 | $35,000 | -$180,000 |
| 23 | $20,000 | $35,000 | -$195,000 |
| 24 | $20,000 | $35,000 | -$210,000 |
| 25 | $20,000 | $35,000 | -$225,000 |
| 26 | $20,000 | $35,000 | -$240,000 |
| 27 | $20,000 | $35,000 | -$255,000 |
| 28 | $20,000 | $35,000 | -$270,000 |
| 29 | $20,000 | $35,000 | -$285,000 |
| 30 | $20,000 | $35,000 | -$300,000 |
| 31 | $20,000 | $35,000 | -$315,000 |
| 32 | $20,000 | $35,000 | -$330,000 |
| 33 | $20,000 | $35,000 | -$345,000 |
| 34 | $20,000 | $35,000 | -$360,000 |
| 35 | $20,000 | $35,000 | -$375,000 |
| 36 | $20,000 | $35,000 | -$390,000 |
How this tool works
Ending cash = previous cash + monthly revenue − monthly expenses
The model covers 36 months. Your first month uses the revenue and expenses you enter. Monthly growth compounds from month two. Timing within each month is treated evenly when estimating the point cash reaches zero or your buffer.
Negative balances represent a funding gap. This tool does not add fundraising, borrowing, taxes, debt payments, or changes in working capital unless you include them in your cash inputs. If your buffer is already reached, its countdown is zero.
SBA: Manage your financesGeneral business planning only. This is a scenario based on your inputs, not financial, tax, or investment advice.
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