Startup Equity Calculator
Ownership and value after a round.
Enter your values
Enter the pre-money valuation in $.
Enter the amount raised in $.
Enter the your stake before in %.
Enter the new option pool in %.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Your stake after
- 32.4%
- Post-money valuation
- $7,500,000.00
- Investor stake
- 20%
- Value of your stake
- $2,430,000.00
Quick answer
Post-money valuation is pre-money plus the amount raised, and dilution follows from that ratio.
Investor % = raise ÷ post-money
At a glance
| What it does | Ownership and value after a round. |
|---|---|
| Category | Business |
| Inputs needed | Pre-money valuation, Amount raised, Your stake before, New option pool |
| Main output | Your stake after |
| Formula | Investor % = raise ÷ post-money |
| Cost | Free — no sign-up, no download |
How to use the Startup Equity Calculator
- 1Enter the pre-money valuation agreed.
- 2Enter the amount being raised.
- 3Add any new option pool created at the round.
Inputs explained
- Pre-money valuation($)
- Enter the pre-money valuation in $.
- Amount raised($)
- Enter the amount raised in $.
- Your stake before(%)
- Enter the your stake before in %.
- New option pool(%)
- Enter the new option pool in %.
Worked example
Using the values the calculator loads with:
Inputs
- Pre-money valuation6000000 $
- Amount raised1500000 $
- Your stake before45 %
- New option pool10 %
Results
- Your stake after32.4%
- Post-money valuation$7,500,000.00
- Investor stake20%
- Value of your stake$2,430,000.00
Frequently asked questions
Who pays for the option pool?
Usually existing shareholders, as it is created pre-money.
Is dilution bad?
Not if the round grows the pie faster than it shrinks your slice.
What do I need to enter into the Startup Equity Calculator?
Just 4 values: pre-money valuation, amount raised, your stake before, new option pool. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Startup Equity Calculator work out the answer?
Post-money valuation is pre-money plus the amount raised, and dilution follows from that ratio. It applies the formula Investor % = raise ÷ post-money and shows the working so you can check each step by hand.
Is the Startup Equity Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.