The method
How it is worked out
Runway = CashE − I
- Cash
- Cash available
- E
- Monthly spending
- I
- Monthly income
Runway Calculator
Estimate how many months cash will last at the current net burn rate. The result updates as you type so you can compare scenarios quickly.
Keep in mind
What it leaves out
- Raising takes timeFundraising usually takes 6 months or more. Start well before the end.
- Burn changesPlans to hire or cut change the answer quickly.
- Credit linesOverdrafts and loans you could draw on aren't counted.
Use the calculator to compare scenarios rather than as a guaranteed forecast.
About the Runway Calculator
Estimate how many months a company could keep operating with its current cash and net monthly spending. This helps a leadership team decide when to start fundraising, reduce costs or bring forward revenue.
How it works and an example to tryShow less
How to use the result
Net monthly burn equals monthly expenses minus monthly income. When that number is positive, divide available cash by it for an indicative runway. If income covers expenses, the tool reports no declining-cash runway under the fixed assumptions rather than a finite deadline. It does not model changing cash flows, new funding or unexpected liabilities.
Example to try
Start with 150,000 in the bank and enter realistic monthly income and expenses. Add a planned hire to the expense figure to see the shorter runway. Leave enough time for financing decisions rather than waiting until the projected cash-out month.
Put it to work
Try it on a real situation
Load an example
What moves the result most
Worked out from your figures above. Tap a row to try it.
Who uses it, and when
Startup founders planning when to start fundraising, boards checking whether the company can reach its next milestone, and operators deciding between cutting costs and pushing growth.
Mistakes worth avoiding
- Starting a raise with six months of runway left when a round typically takes six to nine.
- Assuming income will grow while costs stay flat.
- Forgetting that redundancies and notice periods cost money before they save it.
Questions
What does the Runway Calculator do?
Estimate how many months cash will last at the current net burn rate.
How should I use the result?
Net monthly burn equals monthly expenses minus monthly income. When that number is positive, divide available cash by it for an indicative runway. If income covers expenses, the tool reports no declining-cash runway under the fixed assumptions rather than a finite deadline. It does not model changing cash flows, new funding or unexpected liabilities.
Does TechBullion store the information I enter?
The core calculation or transformation runs in your browser. Normal website security and analytics may still record page-level events, but the tool does not need to create a public record from your inputs.
What mistakes do people make with a runway calculator?
Starting a raise with six months of runway left when a round typically takes six to nine. Assuming income will grow while costs stay flat. Forgetting that redundancies and notice periods cost money before they save it.
Is the result guaranteed?
No. Use the result as a practical check or planning aid and verify important decisions with the relevant primary source, provider or professional advice.
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Calculator results are estimates based on the figures entered and are not financial, investment, legal or tax advice.