Runway Calculator
Months of cash left at the current burn rate
Need to months of cash left at the current burn rate? Runway Calculator gives you an exact answer in seconds. Fill in Cash on Hand ($) and Monthly Burn ($) and read your answer immediately. Every answer includes a transparent breakdown you can repeat by hand. Use it whenever you need a reliable number without opening a spreadsheet. Everything runs in your browser — your inputs are not sent to our servers, and it works offline after the first visit (currency conversion needs a live connection). Searching for runway calculator startup cash burn months remaining or free online runway calculator? This tool covers it — free, fast, and private. No learning curve: the fields are clearly labeled and the result explains itself. Bookmark it and the answer is always one click away.
What does the page calculator do?
Runway Calculator works out the runway from the Cash on Hand and Monthly Burn, following standard Finance conventions — the page defaults produce a runway of 10.0 months.
- Inputs: Cash on Hand and Monthly Burn.
- Output: the runway, plus the intermediate steps behind it.
- Method: the standard Finance formula, evaluated entirely in your browser.
Quick answer
With the default inputs (cash on hand of 250,000, monthly burn of 25,000), runway calculator returns a runway of 10.0 months. Assumptions and limits are summarized below.
How does the Runway Calculator work?
Runway Calculator computes the runway directly from your inputs — the Cash on Hand and Monthly Burn feed the formula. Nothing is uploaded: the math runs locally in your browser and the result appears as you type.
How the Runway Calculator works
Runway Calculator keeps the whole calculation in front of you — the Cash on Hand and Monthly Burn, the formula, the intermediate steps, and a worked example you can reproduce line by line.
How to use it
- Cash on Hand — used in the first stage of the calculation, so entering it accurately matters more than any later refinement.
- Monthly Burn — the value that feeds directly into the formula — match it to the scenario you are modeling before moving on.
- Read the result. The runway appears immediately, with the step-by-step working underneath so you can verify every number.
- Iterate. Vary the inputs one at a time; the movement in the figure shows which lever matters most for your runway question.
The formula behind the result
The calculation in Runway Calculator applies the standard Finance method, keeping full precision internally and rounding only the final display.
Worked example: with cash on hand of 250,000, monthly burn of 25,000, this runway calculation returns Runway: 10.0 months. The same run reports Startups typically begin fundraising when runway drops below 9–12 months.
The steps it follows:
- Formula: Runway = Cash ÷ Net monthly burn
- $250,000 ÷ $25,000 = 10.0 months
- Burn = expenses − revenue. Cutting burn by half doubles runway without raising a cent
Substitute your own values and the same steps produce your answer — that is the point of a calculator that shows its working.
Understanding the result
To interpret the result from runway calculator, read it together with the intermediate figures — the pairing is what makes the number auditable.
Where it helps
Common scenarios for Runway Calculator: day-to-day planning, comparing scenarios side by side, and double-checking a figure before acting on it. The step list makes it equally useful for learning the method and for double-checking someone else's numbers.
Common mistakes
Rounding intermediate values by hand introduces error Runway Calculator does not have; it keeps full precision internally, so trust the displayed runway over mental arithmetic.
Tip: Run Runway Calculator twice with deliberately low and high inputs; the spread tells you how sensitive the figure is, which a single run never shows.
Assumptions and limitations
Inputs outside a reasonable range may produce a runway that is mathematically correct but practically implausible; the steps panel helps you spot that quickly.
Why use this calculator
Because the page doubles as documentation: Runway Calculator puts the formula, a worked example, and the assumptions right beside the calculator.
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Frequently Asked Questions
What does the tool calculate?
Use Runway Calculator when the runway needs to be right the first time: it evaluates your inputs against the standard Finance method and shows the working, not just the answer. Because the working is visible: Runway Calculator shows each operation behind the output in the steps panel, so you can verify the result instead of trusting a black box.
How is the result calculated?
The first steps are formula: runway = cash ÷ net monthly burn, then $250,000 ÷ $25,000 = 10.0 months. The engine behind Runway Calculator evaluates the inputs in a single pass — no hidden iterations or adjustments — so the figure you see is exactly what the formula produces for the values you entered.
What do I need to use the Runway Calculator?
The Cash on Hand and Monthly Burn it asks for, or the page defaults if you just want to see the calculation work. Each input maps directly to the formula, and changing any one of them recalculates the runway instantly.
What does the result from the tool mean?
The main number the runway calculator returns is the runway for your exact inputs, and the supporting figures and step list give it context. Runway Calculator assumes the units shown in each label — entering values in different units will skew the result proportionally.
When is the page most useful?
Runway Calculator fits planning and checking: day-to-day planning, comparing scenarios side by side, and double-checking a figure before acting on it, or any moment when the runway needs to be right the first time. Run Runway Calculator twice with deliberately low and high inputs; the spread tells you how sensitive the output is, which a single run never shows.