Free startup tool

Burn Rate & Runway Calculator

See how many months of runway you have left, and the exact date your cash hits zero. Enter your numbers, or edit the example below.

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What you spend minus what you earn, each month.

Runway left
10.0months
Plan your raise
Monthly net burn$50,000
Cash-zero dateAug 2027

Pre-filled with an example ($500k cash, $50k/mo net burn). Change any field to use your own numbers.

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What is burn rate?

Burn rate is how much cash your startup spends each month to keep operating. Gross burn is your total monthly spend. Net burn is that spend minus the revenue you bring in. It is the number that decides how long you last because it is the real cash leaving your account.

What is runway, and how is it calculated?

Runway is the number of months your startup can keep going before it runs out of cash, assuming your burn stays roughly the same.

Runway (months) = Cash in the bank ÷ Monthly net burn

A company with $500,000 in the bank burning $50,000 a month net has 10 months of runway. If you earn as much as you spend, net burn is zero and your runway is effectively unlimited.

How to read your result

  • Under 6 months: raise or cut now. Fundraising often takes three to six months, so you are already close to the edge.
  • 6 to 12 months: start planning your next round or your path to break-even.
  • Over 12 months: use the time to hit the milestones that make the next raise easier.

How to extend your runway

  • Raise revenue. Every dollar earned cuts net burn dollar for dollar.
  • Cut the largest costs first. Payroll and paid acquisition usually dominate.
  • Time big spends deliberately. Delaying a hire or campaign can add months.

Model the impact against your pricing and hiring plan with solvee.

Frequently asked questions

What is a good burn rate for a startup?

There is no single number. A healthy burn rate leaves at least 12 months of runway while still letting you hit the milestones needed for your next raise.

How do you calculate runway?

Divide your cash in the bank by your monthly net burn. For example, $300,000 in cash and $25,000 in monthly net burn gives 12 months of runway.

What is the difference between gross burn and net burn?

Gross burn is your total monthly cash spend. Net burn is that spend minus revenue, and it determines runway.

How many months of runway should a startup have?

Aim for 12 to 18 months after a raise. Dropping below six months can weaken your negotiating position.

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