Enter the round size and the burn the founder gives you, and see how long the money really lasts: against the runway the deck claims, and against the time companies typically take to raise their next round.
The check runs the round forward one month at a time, for 36 months, from the figures the deck and the founder give you.
The round, plus any cash the company had before it.
Today's burn, rising evenly to the burn once the team is hired over the months the hiring takes. Revenue, if there is any, grows at the rate you give.
The runway against the deck's claim, and against Carta's median time from this stage to the next round.
The answer is free. With your email: the month-by-month chart, when the company must start raising again, questions to ask the founder, and a PDF.
| Stage | Median time to the next round | Bridge rounds |
|---|---|---|
| Seed | 2.0 years, to Series A | 29% of rounds |
| Series A | 2.1 years, to Series B | 33% of rounds |
US companies on Carta. The median is the middle company: half take longer. A bridge round is extra money raised within a stage before the next round; the shares cover 2026 so far. Carta doesn't publish these figures for pre-seed.
Sources: Carta, State of Private Markets: Q1 2026
18 months of runway
This round lasts about 18 months; the deck says 18. Shorter than the 2.0 years US companies typically take from seed to Series A (Carta, Q1 2026).
20 months of runway
This round lasts about 20 months; the deck says 24. Shorter than the 2.1 years US companies typically take from Series A to Series B (Carta, Q1 2026).
11 months of runway
This round lasts about 11 months; the deck says 18. Carta doesn't publish how long pre-seed companies take to reach seed.