Burn Rate and Runway Calculator
See your gross and net burn, how many months of runway your cash gives you, and what is left after a year at today's rate.
- Free
- No sign-up to try
- Works as you type
Burn rate and runway
Gross burn per month
$140,000
Net burn per month
$80,000
Runway
15.0 mo
Cash left after 12 months
$240,000
- Gross burn = cash going out per month.
- Net burn = cash going out − cash coming in.
- Runway = cash ÷ net burn (n/a when you are not burning cash).
- Cash after 12 months = cash − 12 × net burn (below zero means you run out first).
Free, no sign-up to try. Save it as a live calculator you can share; an estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
How it works
How the Burn Rate and Runway Calculator works
- 1
Enter your numbers
Every result updates as you type, with the formula shown under it.
- 2
Check the method
See how each number is worked out and what it assumes.
- 3
Save it as a Room
Share a live calculator: others can change the numbers and see the result update.
Worked example
What it makes
Example inputs
- Cash in the bank
- $1,200,000
- Cash coming in per month
- $60,000
- Cash going out per month
- $140,000
Results
- Gross burn per month
- $140,000
- Net burn per month
- $80,000
- Runway
- 15.0 mo
- Cash left after 12 months
- $240,000
How it's calculated
- Gross burn = cash going out per month.
- Net burn = cash going out − cash coming in.
- Runway = cash ÷ net burn (n/a when you are not burning cash).
- Cash after 12 months = cash − 12 × net burn (below zero means you run out first).
- Assumes: Monthly cash in and out stay the same: growth, hiring and one-off costs are not modelled.
- Assumes: Use cash figures, not accounting revenue and expenses, if they differ.
An estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
Who it's for
Who uses it
Founders
Know when you need to raise or cut, months ahead.
Finance leads
Test hiring plans against runway with the team.
Board members
Check a company's runway with its own numbers.
Good to know
What to consider
- Monthly cash in and out are held flat; growth, hiring and one-off costs are not modelled.
- Use cash figures, not accounting revenue, if customers pay late or upfront.
Questions
About the Burn Rate and Runway Calculator
What is the difference between gross and net burn?
Gross burn is everything you spend in a month. Net burn is what you spend minus the cash that comes in. Runway uses net burn, because that is how fast the bank balance actually falls.
Can I share the calculator with my team or a client?
Yes. The Room keeps the calculator live: anyone with the link can change the numbers and see the result update, with the method and assumptions on the same page.
Make your calculator now
Free, no sign-up to try. It becomes a Room you can edit, publish and share.
Create my calculatorRelated
Related tools
- Rule of 40 CalculatorAdd your revenue growth rate to your profit margin and see how far the total sits above or below 40%, plus the margin you need at today's growth.
- Break-Even CalculatorFind how many units you need to sell to cover your fixed costs, and the revenue that takes.
- Investor Update GeneratorTurn your numbers and notes into an investor update people read: KPIs, wins, misses and your asks, with charts and an AI agent that answers investors' questions.