Calculate monthly net burn
Monthly cash outflow
Monthly cash inflow
Monthly net burn
Monthly net burn = Monthly cash outflow − Monthly cash inflow
Cash flow calculator
Runway Calculator
Use this free runway calculator to estimate how long your cash can support your business operations. Enter your current cash balance, monthly inflows, and monthly outflows to understand your cash runway. It is useful for startups, small businesses, and planning future expenses.
Result overview
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Current cash
1,200,000
Monthly net burn
200,000
Runway
6 months
How to calculate cash runway
Cash runway estimates how many months your business can keep operating with its current cash balance.
It depends on how much cash you have and how much cash you spend each month after inflows.
A longer runway gives you more time to grow, adjust, or raise funding.
Calculate runway
Current cash balance
Monthly net burn
Runway in months
Runway in months = Current cash balance ÷ Monthly net burn
How to use this calculator
- Enter your current available cash
- Enter your average monthly cash inflow
- Enter your average monthly cash outflow
- Review your monthly net burn and estimated runway
Examples
Example
- Current cash balance
- 1,200,000
- Monthly cash inflow
- 300,000
- Monthly cash outflow
- 500,000
- Monthly net burn
- 200,000
- Runway
- 6 months
Tips
Use realistic monthly averages, not your best month.
Review runway regularly as revenue and expenses change.
Separate one-time expenses from recurring monthly expenses.
Watch runway together with invoices, collections, and upcoming payments.
Want better visibility on cash flow and operations?
Gombo helps you create invoices, track payments, monitor revenue, and manage business operations from one connected platform.