Burn Rate & Runway Calculator
How many months of cash are left.
Enter your values
Enter the cash in bank in $.
Enter the monthly expenses in $.
Enter the monthly revenue 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.
- Net monthly burn
- $50000
- Runway
- 10 months
- Runway in years
- 0.83
- Zero-cash date months out
- 10
Quick answer
Runway in months is current cash balance divided by net monthly burn.
runway = cash balance / (expenses - revenue)
At a glance
| What it does | How many months of cash are left. |
|---|---|
| Category | Business |
| Inputs needed | Cash in bank, Monthly expenses, Monthly revenue |
| Main output | Net monthly burn |
| Formula | runway = cash balance / (expenses - revenue) |
| Cost | Free — no sign-up, no download |
How to use the Burn Rate & Runway Calculator
- 1Enter your current cash balance.
- 2Enter average monthly expenses and revenue.
- 3Net burn is expenses minus revenue; runway is cash divided by that burn.
Inputs explained
- Cash in bank($)
- Enter the cash in bank in $.
- Monthly expenses($)
- Enter the monthly expenses in $.
- Monthly revenue($)
- Enter the monthly revenue in $.
Worked example
Using the values the calculator loads with:
Inputs
- Cash in bank500000 $
- Monthly expenses80000 $
- Monthly revenue30000 $
Results
- Net monthly burn$50000
- Runway10 months
- Runway in years0.83
- Zero-cash date months out10
Frequently asked questions
What if revenue exceeds expenses?
Burn is negative, meaning the business is cash flow positive and runway is effectively unlimited.
Should I use gross or net burn?
Net burn (after revenue) gives the realistic runway figure investors look at.
What do I need to enter into the Burn Rate & Runway Calculator?
Just 3 values: cash in bank, monthly expenses, monthly revenue. 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 & Runway Calculator work out the answer?
Runway in months is current cash balance divided by net monthly burn. It applies the formula runway = cash balance / (expenses - revenue) and shows the working so you can check each step by hand.
Is the Burn Rate & 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.