Free founder calculator

How long does your cash last?

Drop in your cash on hand, monthly revenue, and monthly expenses. We tell you the exact months of runway and the right month to start raising the next round.

Exact months of runway at your current net burn
Tells you when to start raising the next round
Free. Localized in 12 languages. No card.

Used by founders deciding whether to raise, cut, or grow at every stage.

Created by founders from top global accelerators

The most checked number in early-stage startups

18+ mo: Healthy runway target at raise
<6 mo: Danger zone, raise yesterday
12: Languages supported
Free: No credit card required

How it works

Three numbers. One clear answer. Zero panic.

01
Drop in your three numbers
Cash on hand, monthly revenue, monthly expenses. From your bank statement and accounting software.
02
We compute net burn and runway
Net burn = expenses minus revenue. Runway = cash / net burn. Simple math, surprisingly often miscalculated.
03
Get your raise window
If runway is 12 to 18 months, you are in the raise window now. Less than 12, raise yesterday. More than 18, ship more first.

See what you'll get

Months of runway plus the right moment to start raising. Sign up to calculate yours.

Sample result

Runway14 monthsMonths until cash runs out at current net burn. Sit between 12 and 18 months and you are in the raise window.

Start raising inNowAt 14 months of runway, you should already be in active conversations. Seed and Series A rounds take 3 to 6 months.

Net monthly burn$48,000Monthly expenses minus monthly revenue. The number that drains your bank each month.

How investors read your runway

Runway is not just a finance number, it is a story about discipline. Four moves to make sure yours tells the right story.

Start raising at 14 to 18 months, not 6

Fundraising takes 3 to 6 months at seed, 6 to 9 months at Series A. Starting at 14 to 18 months of runway leaves margin for slow processes and rejected term sheets. Starting at 6 months is fundraising in panic mode and investors smell it.

Burn rate creeps. Project 6 months out.

Your burn today is not your burn in 6 months. Hires get added, tools get bought, salaries grow. Project burn forward and re-calculate runway against the future burn, not today's. Most founders run out 2 to 3 months earlier than their model predicts.

Cut before you panic, not after

If runway is dropping below 12 months and revenue is not catching up, cut costs early. Cuts at 12 months of runway look strategic; cuts at 4 months look desperate. The market and your team will read both signals correctly.

Communicate runway to your team transparently

Hiding runway erodes trust. Sharing it focuses everyone. Most founders fear team panic; in reality, teams perform better when they know the real timeline. Quarterly runway updates to your team are the bare minimum.

Frequently asked questions

What runway is healthy at the moment of raising?

14 to 18 months. Below 12 looks reactive and weakens your negotiating position. Above 24 looks like you do not need the money (investors prefer founders with urgency). The sweet spot is 14 to 18 months of remaining runway when you start outreach.

Should I include projected revenue growth in runway?

No. Calculate runway against CURRENT net burn for safety. Projected growth is upside, not assumption. Founders who model runway against projected growth consistently run out earlier than predicted.

What if my runway is under 6 months?

Take immediate action: cut burn aggressively, bridge from existing investors, or fundraise opportunistically (warm intros only, no cold outreach time). Below 6 months of runway you should be in a single laser-focused mode, not running normal operations.

How often should I check runway?

Monthly minimum. Weekly during fundraising or active cost-cutting. Quarterly is too infrequent for early-stage. Set a calendar reminder to recalculate every month with fresh numbers from your bank.

What is the difference between runway and burn?

Burn is the monthly rate of cash loss (dollars per month). Runway is the time until cash runs out (months). Runway = cash on hand divided by net burn. Investors look at both: burn is efficiency, runway is urgency.

Keep going

Runway is one number. Here are the rest of the metrics.

Round Funded

Know the timeline. Make the move.

Round Funded gives you the numbers, the investor list, and the outreach so you raise on the right month. Track every conversation in one pipeline.