Before you start
What you need
Pre-money valuation, new primary investment, current ownership, and currency.
Finance & Business Finance
Term Sheet Dilution Calculator
Estimate simple priced-round dilution from pre-money valuation, new investment, and current ownership.
- 01Private browser calculation
- 02Assumptions stay visible
- 03CSV and print ready
Transparent method
How this calculation works
Post-money valuation equals pre-money plus investment. Existing ownership is multiplied by the pre-money share of post-money value.
Useful output
What you receive
Post-money ownership, dilution, investor ownership, valuation, assumptions, and CSV.
Decision guardrail
What this does not decide
Real term sheets may include option-pool top-ups, SAFEs, notes, preferences, warrants, and governance rights that change outcomes.
Practical uses
Where this tool helps
- Model a proposed funding round.
- Explain valuation-driven dilution.
- Compare investment sizes.
Data boundary
Financial inputs remain local
Calculations and report generation run in your browser. Nirmion does not upload, retain, or recover the values entered here. The public catalogue request contains only the tool slug.