BURN RATE
CALCULATOR
Net and gross burn analysis. Know your runway before your next raise.
At this burn rate, you have 9 months before you need to raise or become profitable.
What this calculator does
Burn rate is the speed at which a company spends its cash reserves. This calculator gives you gross burn (total monthly spend), net burn (spend minus revenue), and monthly runway in months — the three numbers every investor will ask for in a first meeting.
Who uses it
Founders preparing for fundraising conversations. CFOs producing board-ready financials. Investors running a quick pre-LOI sanity check on a company's cash position.
What to do with the output
Net burn and runway feed directly into your fundraising brief. On Lengdon, these figures anchor the financial section of your deal room and are referenced in the diligence checklist as confirmed inputs — so investors see a number that matches your data room, not a slide deck estimate.
Key terms
Gross burn: total cash out per month before revenue offsets. Net burn: cash out minus cash in — the true depletion rate. Runway: months of cash remaining at current net burn. Zero-cash date: the calendar date at which the company runs out of money at current burn.
How to use this in a deal room
Investors will ask for your net burn figure in the first meeting. Having it pre-calculated and attached to your deal room means you are not estimating in the room — you are referencing a number that is already in the data room and consistent with your financial exhibits.
Related tools
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