Free tools / Pre-Money / Post-Money Calculator
Work out your dilution before you raise
Pre-money, post-money and the exact percentage you give away, plus what you keep.
A single round around 15-20% dilution is normal; much over a third for one round usually means the valuation was too low for what you raised. This ignores option-pool top-ups, which dilute founders further.
The full read
These numbers are only as good as the idea underneath them. Pressure-test the whole thing: market sizing from real sources, the risks that could kill it, and a 2-week test plan.
Signing in also gets you the exact places your first customers are with who to reach, a new first-customer play every week, and follow-up questions saved in your workspace.
1 free analysis a month, no card.
Pre-money plus the raise gives post-money, and the share you give up.
When you raise a round, the investment buys a slice of the company. Enter your pre-money valuation and the amount you're raising to see your post-money valuation and exactly how much ownership you hand over.
Post-money valuation = pre-money valuation + the amount raised. The investor's ownership is the amount raised ÷ post-money, and your dilution is that same percentage.
Pre vs post is where founders get caught: a $1M raise at a $4M pre-money is 20% dilution (post-money $5M), but the same $1M at a $4M post-money is 25%. Always be clear which one you're negotiating.
A single early round around 15-20% dilution is normal. Much more than a third for one round usually means the valuation was too low. And this ignores option-pool top-ups, which dilute founders further still.
Want proof it’s not made up? See real ideas run through this tool: the buyer, the spots, and the opener actually sent.
Questions
3 answeredHow do I calculate post-money valuation?
Add the amount you're raising to your pre-money valuation. So a $4M pre-money plus a $1M raise is a $5M post-money. Enter both above to also see the investor's ownership and your dilution.
How much equity do you give up in a funding round?
The investor's share is the amount raised divided by the post-money valuation. Raising $1M at a $5M post-money gives them 20%, which is also your dilution. A single early round around 15-20% is normal.
What is the difference between pre-money and post-money?
Pre-money is the company's value before the new investment; post-money is pre-money plus the amount raised. The same dollar raise means more dilution against a post-money number than a pre-money one, so always clarify which is being quoted.
The guide behind this tool
Pre-money vs post-money valuation
Pre-money valuation is what your company is worth before the investment; post-money adds the raise. The difference decides how much of the company you give up.
Read the guideMore free tools
- Subreddit Promotion CheckerCheck the door before you knock. Posting and commenting are different rules.
- Idea ValidatorAn honest score on your idea. It'll tell you to kill it if it deserves it.
- Roast My IdeaPaste your idea. Get a brutally honest roast you can actually share.
- Find Your First CustomersThe actual places your first customers are: named, not “do content marketing.”
- Why your site loses customersPaste your site and get the honest gaps costing you customers, and how to fix each.