Extend your startup runway.

Startup runway extension calculates how much longer cash lasts after cost cuts or revenue increases. Most startups facing fundraising difficulty need to extend runway from 6-9 months to 12-18 months to reach the next milestone. This tool models the impact of cutting burn and adding revenue on remaining months.

500k cash at 50k/month burn = 10 months current runway. Cut costs 20% (new burn 40k) + add 5k/month revenue = net burn 35k. Extended runway: 14.3 months. Gained 4.3 months. Often enough to close a funding round or reach break-even if changes are implemented decisively.

Runway math is unforgiving. 3 months of delayed action at 50k burn = 150k lost. The earlier cost cuts happen, the more runway extends. Companies that wait until 3 months runway to cut lose far more than those who act at 6 months. Founders consistently underestimate how long fundraising takes (typically 4-6 months for seed, 6-9 months for Series A).

Run it with sensible defaults

Using current cash of 500,000, current monthly burn of 50,000, cost reduction of 20%, revenue increase monthly of 5,000, the calculation works out to 14.3 months. Nudge the inputs toward your own situation and the output recalculates instantly. The defaults are meant as a starting point, not a recommendation.

The levers in this calculation

The inputs — Current Cash, Current Monthly Burn, Cost Reduction %, and Revenue Increase Monthly — do not pull with equal force. Not every input has equal weight. Flip one at a time toward extreme values to feel which ones move the needle most for your situation.

How the math works

New burn = current × (1 - cut %) - revenue increase. Extended runway = cash ÷ new burn. The working is transparent — you can verify every step yourself in the formula section below. No black box, no opaque "proprietary model".

Using this as a check-in

Re-run this every three months. A single reading tells you where you stand; four readings tell you whether things are improving. The trend matters more than any individual snapshot.

What this doesn't capture

The score is a composite of the inputs you provide. Life context — job security, family obligations, health, housing — doesn't appear in the math but shapes the real picture. Use the number as a prompt, not a verdict.