Equity Dilution Calculator
Model how your startup ownership changes through funding rounds. Track dilution, project exit values, and understand the impact of option pools on your equity.
Starting Position
Enter your current ownership structure before any new funding rounds
Combined founder ownership
Existing employee option pool
To calculate per-founder ownership
Per Founder:50.00%
Existing Investors:0.00%
Unallocated:0.00%
Funding Rounds
Add funding rounds to model dilution. Each round includes new investor ownership and option pool expansion.
1
Seed
Post-Money:$10M
Investor Ownership:20.00%
Total Round Dilution:~28.00%
Final Ownership
72.00%
36.00% per founder
Total Dilution
-28.00%
From 100.00% starting
Final Valuation
$10M
Post-money after all rounds
Your Stake Value
$7.2M
$3.6M per founder
Ownership Evolution
How ownership changes across funding rounds
Round by Round Summary
Detailed breakdown of ownership after each round
| Round | Your Ownership | Per Founder | Option Pool | Round Dilution | Valuation | Stake Value |
|---|---|---|---|---|---|---|
| Starting | 100.00% | 50.00% | 0.00% | - | - | - |
| Seed | 72.00% | 36.00% | 10.00% | -28.00% | $10M | $7.2M |
Want to learn more about equity dilution?
Read our comprehensive guide covering how dilution works, anti-dilution provisions, and strategies to minimize ownership reduction.
Read the complete equity dilution guide →