Runway Calculator
Estimate how many months of runway your cash provides at the current net burn, including a burn rate that grows each month.
Your inputs
Results
Runway
19 months
- Monthly burn in 6 months
- $20,000.00
≈Estimate based on the stated model and assumptions
What this calculator does
Runway is the time until cash runs out if nothing changes. Growing teams often see burn rise, so the tool can model monthly burn growth.
Formula and method
Worked example
Calculated by this tool with its default inputs:
Inputs
- Cash available now: 380000 (any currency)
- Current monthly net burn: 20000 (any currency)
- Monthly growth in net burn: 0 %
Results
- Runway: 19 months
- Monthly burn in 6 months: 20,000
How to read the results
Many founders start fundraising with at least 6–9 months of runway left.
Assumptions and limitations
- Revenue growth that shrinks burn is not modelled unless you enter a negative growth rate.
Financial results are estimates based on the inputs and assumptions shown. They are not financial advice; confirm figures with your lender, provider or a qualified adviser before making decisions.
Questions
Why might runway be infinite?
If burn shrinks fast enough (negative growth), the cumulative spend may never reach your cash balance.
Methodology and verification
- Result type
- Estimate based on the stated model and assumptions
- Formula version
- 1.0
- Automated verification
- 3 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
- Editorial review
- Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.
Privacy
Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy