Burn Rate and Runway Calculator
Months of runway at current burn.
Enter your values
Enter the cash in bank in $.
Enter the monthly spend in $.
Enter the monthly revenue in $.
Enter the revenue growth in %.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Runway with growth
- 120 months
- Net monthly burn
- $57,000.00
- Flat runway
- 8.4 months
- Break-even revenue
- $95,000.00
Quick answer
Runway is cash on hand divided by net monthly burn.
Runway = cash ÷ (spend − revenue)
At a glance
| What it does | Months of runway at current burn. |
|---|---|
| Category | Business |
| Inputs needed | Cash in bank, Monthly spend, Monthly revenue, Revenue growth |
| Main output | Runway with growth |
| Formula | Runway = cash ÷ (spend − revenue) |
| Cost | Free — no sign-up, no download |
How to use the Burn Rate and Runway Calculator
- 1Enter your cash balance.
- 2Enter monthly spend and revenue.
- 3Add expected revenue growth.
Inputs explained
- Cash in bank($)
- Enter the cash in bank in $.
- Monthly spend($)
- Enter the monthly spend in $.
- Monthly revenue($)
- Enter the monthly revenue in $.
- Revenue growth(%)
- Enter the revenue growth in %.
Worked example
Using the values the calculator loads with:
Inputs
- Cash in bank480000 $
- Monthly spend95000 $
- Monthly revenue38000 $
- Revenue growth8 %
Results
- Runway with growth120 months
- Net monthly burn$57,000.00
- Flat runway8.4 months
- Break-even revenue$95,000.00
Frequently asked questions
How much runway is safe?
Raise when you have 9–12 months left.
Is gross burn the same?
No — gross burn ignores revenue; net burn is what depletes cash.
What do I need to enter into the Burn Rate and Runway Calculator?
Just 4 values: cash in bank, monthly spend, monthly revenue, revenue growth. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Burn Rate and Runway Calculator work out the answer?
Runway is cash on hand divided by net monthly burn. It applies the formula Runway = cash ÷ (spend − revenue) and shows the working so you can check each step by hand.
Is the Burn Rate and Runway Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.