What it calculates
The cash runway calculator estimates how many months current cash can cover net monthly burn.
Choose an amount before the secure payment page opens.
Business
Browser-sideCash Runway Calculator
Estimate how many months current cash covers net burn before the balance becomes constrained.
Inputs
Enter cash on hand, monthly operating cost and monthly revenue to estimate runway.
Live answer
Result
Calculations run in this browser session. CalcHarbor does not store entered values.
Support
Keep this free result available
Use the result first. Support and promotional areas stay separate from the useful result.
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- Promotions kept separate
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Guide and interpretation
Formula
Net burn = monthly operating cost - monthly revenue. Runway months = cash on hand / net burn.
How to interpret it
More runway gives more time to adjust revenue, cost, pricing or financing before cash becomes constrained.
Common mistakes
Do not include one-time receipts or annual expenses without converting them to the same monthly period.
Limits
The model excludes credit lines, delayed invoices, taxes, debt covenants and financing events unless reflected in inputs.
FAQ
Are values stored?
No. CalcHarbor calculates in the browser and does not store calculator inputs or results.
Can I use this for final financial decisions?
Use the result as a planning signal. Confirm legal, tax, credit and accounting decisions with a qualified professional.