scale-dux Account
Takes about 2 minutesFree, no sign-upZero-cash date included

Runway Calculator

How long can you keep going? Enter your cash and your burn, and see your exact zero-cash date. Then model what happens if you trim spend or close a new round, so you walk into every decision with the timeline in front of you.

View
Your inputs
Everything updates the moment you type
₹
₹
₹
What-if levers
%
₹
%
Current runway
Start raising
7.5 months
Cash reaches zero around Feb 2027 at today’s burn
Net burn
₹16 L
What-if runway
Unlimited
Extra months gained
∞
Raise by
Sep 2026
Runway health
06121824
8
Start raising
Runway by spend level
Months of cash at lower spend
8 mo
9 mo
10 mo
13 mo
Now
base
−10%
−20%
−30%
Cash projection
Base case versus your what-if
Base case
With what-if
M0M4M8M12M16M20M24M26
Base case runs out around month 8
A cash-based projection assuming steady spend and compounding revenue growth. Treat it as a planning guide and revisit it whenever your numbers change.
How this calculator works

Cash divided by net burn

Net burn is your monthly spend minus revenue. Divide cash by net burn and you get runway in months. Growing revenue and cutting spend both stretch that number.

The formulas
Net burn
Monthly spend − Monthly revenue
Runway (months)
Cash in bank ÷ Net burn
Zero-cash date
Today + Runway months
What-if runway
Projected with spend cut, new raise and growth
Every field explained

What each input actually means

Cash in the bank
Total money you can actually spend today. This is the numerator in the runway calculation.
Monthly gross spend
Everything you pay out in a typical month across payroll, marketing, operations and tools.
Monthly revenue
The cash customers pay you each month. It offsets your spend to give net burn.
Cut spend by
A percentage reduction you want to test. The what-if line shows the runway you would gain by trimming.
New raise incoming
Money from a round you expect to close. It adds to cash and pushes your zero-cash date out.
Revenue growth per month
How fast revenue grows each month. Compounding growth steadily lowers net burn over time.
Benchmarks

How much runway should you keep?

A simple guide to how much cushion investors expect at each level, and when to start your next raise.

18+ months: build mode
You can focus on milestones rather than fundraising, and raise from strength when you choose to.
12 to 18 months: healthy
A solid position. Keep your next raise on the roadmap and protect your burn discipline.
6 to 12 months: get moving
Fundraising should already be underway, since it usually takes three to six months to close.
Under 6 months: act now
Cut non-essential spend, line up a bridge if needed, and prioritise revenue that lands fast.
Questions, answered

Runway FAQ

Runway is the number of months your company can keep operating before it runs out of cash, assuming your current net burn holds steady. You calculate it by dividing cash in the bank by monthly net burn.
Keep going

Your next move

See all calculators →
Powered by ScaleDux

Build your startup on numbers you trust

ScaleDux connects founders with verified experts, mentors and investors. All from one free account.