Cash Runway Calculator & Burn-Rate Visualizer

Current burn-
Runway-
Zero-cash date-
Ending cash at horizon-
Avg burn (last 3 mo)-

                    

            

              

                

                  

                    
                      
                    
                  

                

                

                  
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What is Cash Runway Calculator & Burn-Rate Visualizer


Cash Runway Calculator & Burn-Rate Visualizer shows how long your cash will last and how your balance changes month by month. Many teams know their current burn, but not the date when cash hits zero - or how small growth tweaks change the curve. The free Cash Runway Calculator & Burn-Rate Visualizer by FlexiTools.io gives you a clear runway in months, a projected zero-cash date, and a clean cash chart. In the next 60 seconds, you will enter starting cash, monthly revenue and expenses, set simple growth rates, and see a practical forecast you can share.


How to Use Our Cash Runway Calculator & Burn-Rate Visualizer


    

  1. Enter your currency, starting cash, monthly revenue, and monthly expenses.
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  2. Add monthly growth rates for revenue and expenses if you expect changes.
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  3. Choose a horizon, then click Calculate to see runway, zero-cash date, and a chart.
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  4. Copy Summary or Download CSV to include the forecast in your plan.
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Why FlexiTools.io Offers the Best Cash Runway Calculator & Burn-Rate Visualizer


Clear, instant answers


You get the numbers that matter - current burn, runway in months, zero-cash date, and ending cash at your horizon.


Visual timeline you can explain


A simple chart shows the cash balance by month. You can point to the bend in the line and discuss how hiring or growth affects it.


Private and fast


Everything runs in your browser. No uploads, no accounts, and no waiting.


Comparison - FlexiTools.io vs typical alternatives:


    

  • FlexiTools.io: Client-side only, CSV export, readable summary, keyboard-friendly.
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  • Typical alternatives: Sign-ups, heavy templates, hidden formulas, limited sharing.
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A Deeper Look at Burn Rate, Runway, and Cash Planning


Burn rate - the monthly gap


Burn rate is the difference between your monthly expenses and your monthly revenue. If expenses are $60,000 and revenue is $30,000, burn is $30,000 per month. If revenue lifts above expenses, you are cash flow positive and your cash grows. It is tempting to track only the top line, but burn rate is the real pressure - it tells you how many pay periods are safe.


Runway - time until zero cash


Runway is how many months you can fund operations before the cash balance hits zero. In a steady state, the math is simple: runway equals starting cash divided by burn. In real life, growth and costs shift a little each month. That is why this tool simulates month by month with growth rates. A small monthly revenue lift - even 3-5% - can bend the line enough to buy time. The reverse is true for rising expenses.


Growth assumptions - small changes, big effects


    

  • Revenue growth often comes from pricing, activation, or expansion.
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  • Expense growth often comes from hiring, increased ad spend, or tools.
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  • If both grow, the net effect on burn depends on which grows faster.
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Want to sanity check the big picture? Read the SEC’s beginner guide to financial statements, especially the cash flow statement section, on the official site. It frames the link between profit, working capital, and cash movements in a way that maps to real planning. When you share the numbers, keep the language plain and specific so non-finance teammates can follow. The checklist at PlainLanguage.gov is a good reference for clear assumptions.


Working capital and timing


Runway is not only about profit. Timing matters. If you collect revenue 30 days after invoicing but pay vendors in 15, your cash will dip even if the income statement looks fine. A lightweight fix is to track a few simple timing rules alongside your model: average days sales outstanding (DSO) and days payable outstanding (DPO). If DSO is high, tighten collections. If DPO is low, see if you can align payment terms with billing dates. These small moves help the curve without cutting growth work.


Example you can reuse


A startup has $150,000 cash, $30,000 revenue, $60,000 expenses, revenue growing 5% per month, expenses growing 1% per month. The current burn is $30,000. The chart shows a bend where revenue catches up. Runway improves from roughly 5 months in a flat model to closer to 7 months once growth is applied. That two-month cushion is worth a lot - it can cover a seasonal dip or give time to close a funding round.


What to watch and discuss


    

  • If burn is rising month over month, pause hiring until revenue growth is visible and repeatable.
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  • If runway is under 6 months, set clear spend limits and weekly review points.
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  • If runway is over 12 months and growth signals are strong, consider investing in high-confidence channels.
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Communicating the plan


Good runway updates fit on one page: current burn, months of runway, zero-cash date, biggest assumption, and one lever you will test next. Link to the CSV for detail. In meetings, point to the chart and mark the spot where cash crosses zero. Ask - what single change would move this point right by two months?


Editorial note: This page used AI assistance and was reviewed by a human editor for accuracy and clarity.


Pro-Tips for Getting the Most Out of Runway Planning


    

  • Model a cautious case. Lower revenue by 10% and raise expenses by 5% to see a safety margin.
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  • Revisit monthly. Update actuals, then re-run the forecast so your team trusts the numbers.
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  • Tie actions to levers. Every plan should link runway gains to a concrete step - a price test, a hiring freeze, or a new channel.
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                    How do you calculate runway?                    
                  
                  
We simulate month by month using your starting cash, revenue, and expenses. If cash drops below zero in the forecast, we estimate the month and show an approximate zero-cash date. If cash grows, we label runway as increasing.

                

                                                              

                  
                    What if my company is cash flow positive?                    
                  
                  
If revenue is above expenses, burn is zero or negative. Your cash balance should grow over time. The tool will show “Cash increasing,” an ending cash figure at your chosen horizon, and a rising line on the chart.

                

                                                              

                  
                    Do growth rates compound?                    
                  
                  
Yes. Revenue and expense growth apply each month to the prior month’s values. This mimics how teams scale headcount or how subscriptions add up over time. If you expect step changes, export CSV and adjust in a spreadsheet.

                

                                                              

                  
                    Can I include fundraising or one-time costs?                    
                  
                  
This version focuses on recurring revenue and expenses. For a one-time inflow or outflow, export the CSV and add it in your sheet on the month you expect it. We will consider a milestones feature in a future update.

                

                                                              

                  
                    Is this financial advice?                    
                  
                  
No. This is a planning tool to support internal decisions. Please review results with your finance lead or advisor. Numbers should be checked against your accounting system before sharing externally.