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Cash runway calculator. How many months you have left.

A free cash runway calculator that divides your cash on hand by your monthly net burn. The number that decides when you raise, when you cut and how much risk you can take.

The calculator

Cash runway, live.

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Your runway
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This calculator runs entirely in your browser. Nothing you enter is sent anywhere or stored. It is a quick estimate, not financial advice.

Why it matters

What your cash runway is really telling you.

Cash runway is how many months you can operate before the money runs out at your current burn. It is the number that decides when you raise, when you cut and how much risk you can take. Every other plan sits on top of it.

The mistake founders make is measuring runway on gross burn or a single good month. Use net burn averaged over the last three months. One strong month can hide a trend that ends the company.

How to use it

Acting on your cash runway.

The old rule was to raise with 12 months of runway left. In a tighter market, start sooner. Rounds take longer than they used to and negotiating from 4 months of runway is negotiating from weakness.

If runway is short and a raise is not certain, the lever is burn, not hope. Protect the spend that drives efficient pipeline and cut the rest. Runway bought by cutting growth you could not afford is still runway.

Common questions

What people ask about the cash runway calculator.

What is a cash runway calculator?+

A cash runway calculator divides your cash on hand by your monthly net burn to show how many months you can operate before running out of money at the current rate.

How many months of runway should I have?+

Under 6 months is a danger zone, 6 to 12 is tight, 12 to 18 is healthy and over 18 is comfortable. Start raising earlier than you think, since rounds take longer in a tight market.

Should I use gross or net burn for runway?+

Net burn, averaged over the last three months. Gross burn ignores incoming cash and a single good month flatters the picture.

When should I start raising based on runway?+

Begin conversations with at least 9 to 12 months left. Raising from a position of short runway weakens your terms and your negotiating power.

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