Startup Valuation & Funding Round Simulator
Model post-money valuation, dilution, and cap table scenarios. Inspired by OpenAI's $100B funding round.
OpenAI's $100B round has every founder asking: what multiple would that imply? Model your own funding scenario below.
Run Your Own Simulation
Adjust the inputs below. Results update instantly. No signup, no data saved — everything runs in your browser.
How We Calculate Valuation
Every funding conversation starts with the same question: What’s our company worth? Our tool uses industry-standard formulas — no external APIs, no guesswork. All math runs in your browser.
Core Formulas
- Pre-money = ARR (or revenue) × Valuation multiple
- Post-money = Pre-money + Round size
- Dilution = (Round size ÷ Post-money) × 100%
- Runway = Cash ÷ Monthly burn rate
A $10M ARR SaaS at 15x gets $150M pre-money. Raise $30M and your post-money is $180M — you’ve sold 16.7% of the company. Simple. But the real art is choosing the right multiple.
What drives multiples? Growth rate, margins, market size, and sector hype. AI infrastructure commanded 30x+ in 2025. Traditional B2B SaaS hovered around 8–15x. Use the calculator to model different scenarios before you walk into the room.
Search-friendly: How is post-money valuation calculated?
Post-money valuation is the company’s worth immediately after new money is invested. It equals pre-money valuation plus the round size. If pre-money is $100M and you raise $25M, post-money is $125M. That $25M buys 20% ($25M ÷ $125M) of the company. The formula is simple; the art is in negotiating the pre-money.
Runway and burn: the investor lens
Investors want 18–24 months of runway post-raise. If you burn $200K/month, a $5M round gives you 25 months — comfortable. At $400K burn, same round gives 12.5 months — tight. Model burn and runway in the calculator to show you’ve thought it through. Runway = Cash ÷ Monthly burn. Memorize it.
The News Driving This Conversation
OpenAI’s $100B round put startup valuations back in the spotlight. At implied multiples north of 50x revenue (or more), it represents a tier of funding most companies never touch. Use this tool to model your own round and see how your numbers compare.
Elite AI and infrastructure plays get premiums. Everyone else benchmarks against growth-stage SaaS. The gap between OpenAI and a $5M ARR startup is enormous — and that’s why founders need to model, not guess.
Why valuation multiples matter for fundraising
Multiple sets your dilution. At 10x, $5M ARR = $50M pre-money. Raise $15M and you dilute 23%. At 15x, same revenue = $75M pre-money — $15M buys only 17%. Higher multiple, less dilution for the same check. Know your bracket before the term sheet lands.
How to Interpret Your Results
Not all multiples are created equal. Where do you land?
| Tier | Multiple | Who fits |
|---|---|---|
| Elite | 20x+ | AI, infra, category leaders |
| Strong | 12–20x | Growth SaaS, strong unit economics |
| Average | 6–12x | Typical Series A/B SaaS |
| Early | 3–6x | Pre-revenue or early traction |
Takeaway: If your calculator shows 12x and you’re in a hot space, you might push for 15x. If you’re at 6x, focus on growth and efficiency to move into the next bracket. Dilution compounds — a few points matter over multiple rounds.
What multiple do AI startups get?
AI/ML startups in 2025 often commanded 15–30x ARR or higher. Infrastructure plays (compute, data, tooling) saw the biggest premiums. Application-layer AI tended to land in the 10–20x range. Use our sliders to test an “AI premium” scenario and see the impact on your cap table.
Who Should Use This Calculator
Founders preparing a fundraise — model dilution before the deck. Know your numbers cold when investors ask “what’s your pre-money?”
VCs and angels — sanity-check term sheets. Is that 20x reasonable for this stage? Run the math.
Advisors and board members — help portfolio companies model rounds. One spreadsheet mistake can cost founders millions in excessive dilution.
CFOs and finance teams — plan runway and cap table. See how much you need to raise for 18–24 months of runway without over-diluting.
Planning a Series A? Model before the deck
Plug in your ARR, pick a multiple, add the round size. In 30 seconds you’ll know your post-money, dilution, and where you sit versus benchmarks. No Excel, no guesswork. Then take that confidence into the conversation.
Why founders leave money on the table
Founders who don’t model valuation often accept the first term sheet. Investors have the spreadsheet. You should too. A 2x multiple difference on a $20M round can mean 5–10% less dilution. That’s millions in future value. Run the numbers before you negotiate.
Cap table sanity check
After each round, ownership shifts. Use the calculator to see post-dilution ownership for founders, employees, and investors. Three rounds at 15–20% dilution each leaves founders with 50–60% — if you’re careful. Model the path before you walk it.
Frequently Asked Questions
Want a Deeper Analysis?
These calculators reveal opportunities. Our audit turns them into predictable revenue.
Get Your Free Growth Audit