Runway Calculator
Calculate Runway step by step: Runway = cash available ÷ net monthly burn.
In short
Formula: Runway = cash available ÷ net monthly burn.
What this calculator does
Calculate Runway step by step: Runway = cash available ÷ net monthly burn. Worked example, questions and limitations included.
Use it to turn Currency (symbol only, never converted), Cash available now, Net burn per month into a checked result you can compare, copy, or rerun with different assumptions.
The page shows the formula, a numeric worked example, and the assumptions that affect this fp&a calculation.
Inputs and what they mean
- Currency (symbol only, never converted)
- — choice value.
- Cash available now
- — number value.
- Net burn per month
- — number value.
How to use it
- Enter each value in the unit shown next to the box (use the unit converter first if your numbers are in other units).
- Check the breakdown to see every intermediate step.
- Read the limitations before relying on the result.
Formula
Common startup-finance measure; assumes burn stays constant.
Use the burn rate calculator to get the monthly figure.
Undrawn credit lines are excluded unless you add them to cash.
Runway = cash available ÷ net monthly burn.
Inputs used: Currency (symbol only, never converted), Cash available now, Net burn per month.
Worked example
$450,000 cash
- 450,000 ÷ 50,000 = 9 months.
Reading the result
The headline figure is the main answer. Any breakdown underneath shows the parts that make it up, so you can check the working and see what changes when you adjust an input.
Limitations and assumptions
- Constant burn.
- No standard body defines runway; conventions vary.
- Results are educational estimates built only from the figures you enter. They are not personalised investment, tax, legal or accounting advice. Rates, growth and discount assumptions are always yours to choose.
- The result depends on the values you enter for this runway calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.
Common questions
What if burn is zero or negative?
The business is not consuming cash, so runway is not limited by burn. Check the formula, example, and limitations on this page before using the result for a real fp&a decision.
Does it account for growth?
No — burn is held constant. Check the formula, example, and limitations on this page before using the result for a real fp&a decision.
Is this a prediction?
No. It projects the assumptions you enter. Growth, rates and scenarios are your choices — none are built in.
How do I use the Runway Calculator?
Enter the required values for Currency (symbol only, never converted), Cash available now, Net burn per month. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.
What formula does the Runway Calculator use?
Runway = cash available ÷ net monthly burn. The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone.
Can the Runway Calculator be used for exact decisions?
Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.
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