Estimate how long your startup can operate after cost cuts, added revenue, or extra funding. This runway extension calculator shows adjusted burn, extended months, cash risk, and when to prepare the next raise.
Enter current cash, current monthly burn, expected monthly cost reductions, and new monthly recurring revenue. The calculator estimates your adjusted burn and the extra runway created by those changes.
Use conservative numbers if you are using this for fundraising timing or hiring decisions.
The result estimates how many months your available cash can last after your planned improvements. A longer runway reduces fundraising pressure and gives more time to reach growth milestones.
For seed-stage startups, 18 months of runway is usually safer than waiting until cash becomes tight.
If a startup has $250,000 cash, burns $35,000 per month, cuts $8,000, and adds $5,000 of monthly revenue, adjusted burn becomes $22,000 and runway increases from 7.1 months to 11.4 months.
Enter your current cash, burn rate, and expected monthly savings. The calculator shows how many additional months those cuts add to your runway.
Compare your adjusted burn against current cash. If the runway is below 18 months, increase monthly revenue or reduce burn until the calculated runway reaches the target.
Many startups begin fundraising when 9 to 12 months of cash remain, because investor conversations, diligence, and closing can take several months.
Cash exhaustion is estimated by dividing available cash by adjusted monthly burn, then converting the resulting months into a future date.
Use the burn reduction input to test lower spending levels until the runway and health score move into a safer range.
| Metric | Use |
|---|---|
| Adjusted burn | Shows the monthly cash loss after savings and revenue improvements. |
| Runway extension | Compares the new runway against the original runway. |
| Cash risk | Highlights whether the company has enough time to raise or grow. |
| Fundraising timing | Helps decide when to prepare the next round. |