Burn Rate Calculator
Net burn & how many months of runway you have left.
Calculate your startup’s burn rate and cash runway. Enter your cash in the bank, monthly expenses and monthly revenue to see gross burn, net burn and how many months of runway remain before you run out of cash. Runs fully in your browser — nothing is uploaded.
How to use Burn Rate Calculator
Enter cash in bank
Type your current cash reserves into the free online Burn Rate Calculator, the starting balance used to work out how many months of runway remain.
Add monthly expenses
Enter your total monthly cash outflow to set your gross burn, covering salaries, rent, tools, marketing and every recurring startup operating cost.
Enter monthly revenue
Input the recurring revenue you bring in each month so the Burn Rate Calculator can subtract it from expenses and compute your true net burn.
Read net burn
Instantly see your net monthly burn (expenses minus revenue) and gross burn, the core numbers that drive your startup runway calculation.
Check your runway
View how many months of runway you have left at the current burn, with a clear warning flagged whenever under roughly six months of cash remains.
Share or reset
Share your runway result with a link or reset to model new revenue and cost scenarios, planning fundraising and budget cuts free in your browser.
Frequently asked questions
What’s the difference between gross and net burn?
Gross burn is your total monthly cash outflow (all expenses). Net burn subtracts the revenue you bring in, so it’s the actual cash you lose each month. Runway is based on net burn.
How is runway calculated?
Runway = cash in bank ÷ net monthly burn. If you have ₹50,00,000 and burn ₹5,00,000 net per month, you have about 10 months of runway.
What if my revenue covers expenses?
Then your net burn is zero or negative — you’re cash-flow positive and not burning cash, so runway is effectively unlimited (shown as ∞).
How do I calculate my startup’s burn rate and runway?
Enter your cash in the bank, monthly expenses and monthly revenue, and this free burn rate calculator works out your net monthly burn (expenses − revenue) and your runway (cash ÷ net burn) in months. Both update instantly as you change the numbers.
What is a healthy startup runway?
Most investors suggest keeping 12–18 months of runway so you have time to hit milestones and raise your next round. This calculator flags a short runway when you have under about six months of cash left at your current burn rate.
How do I extend my startup's runway?
Runway = cash ÷ net burn, so you extend it by cutting monthly expenses, growing revenue, or raising more cash. Because net burn is expenses minus revenue, even a small revenue increase or cost cut can add several months to your runway at the same cash balance.
When should I start raising my next round?
A common rule is to begin fundraising with 6–12 months of runway left, since a raise can take several months to close. This calculator flags a short runway under about six months, which is the point to prioritise either a raise or a path to cash-flow breakeven.
Is my data sent anywhere?
No. Everything is calculated in your browser with JavaScript — nothing you enter is uploaded.
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