Entrepreneur · Free Interactive Tool
Seed Round Sizing Calculator
How much to raise — enough for milestones, not vanity.
Your Numbers
The Result
The Operator's Read
Raise about $1,728,000 to fund 18-ish months with a buffer. Raise for milestones plus cushion — running out at month 15 of an 18-month plan is the classic mistake.
Built by The Crimson Bench · Educational tool, not financial advice
About the Seed Round Sizing Calculator
Size a round from your burn, the runway you want, and a safety buffer.
How the Seed Round Sizing Calculator Works
3 inputs in, 1 results out — computed live on your device. Here's exactly what it uses.
| Input | Example value |
|---|---|
| Monthly net burn | $80,000 |
| Runway wanted (months) | 18 |
| Safety buffer | 20% |
Worked Example
Using the example inputs above, the tool returns:
Amount to raise
$1,728,000
The Operator's Read
Raise about $1,728,000 to fund 18-ish months with a buffer. Raise for milestones plus cushion — running out at month 15 of an 18-month plan is the classic mistake.
Assumptions & Limitations
- •This is a single-point calculator — it answers one question at a time. For a full time-based projection, use the matching Toolkit Pro simulator.
- •Defaults are illustrative. Replace them with your real numbers before relying on the result.
- •Educational tool only — not financial, investment, tax, or legal advice.
Frequently Asked Questions
What does the Seed Round Sizing Calculator calculate?
Size a round from your burn, the runway you want, and a safety buffer. It takes 3 inputs — Monthly net burn, Runway wanted (months), Safety buffer — and returns Amount to raise.
How do I use the Seed Round Sizing Calculator?
Enter your figures in the fields above and the result updates instantly. No signup, no limits, and nothing leaves your browser — the math runs on your device.
Is the Seed Round Sizing Calculator free?
Yes, completely free. For the full time-based simulation — projection tables, scenarios, Excel/PDF export, and AI analysis — see the matching Toolkit Pro simulator.
Who built this tool?
The Crimson Bench's Ivy League-educated operators — the same people we deploy into C-suites. It uses the exact method they'd apply in an engagement.
Is this financial advice?
No. The Seed Round Sizing Calculator is an educational tool for directional planning — not financial, investment, tax, or legal advice.
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The Crimson Bench · Est. 2002 · Founded in New York City
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