Post-Money SAFE & Convertible Note Ownership Dilution Calculator

Model Post-Money SAFE cap and priced Series A round founder dilution.

Post-Series A Founder Ownership
72.92 %
SAFE Ownership at Conversion 12.5 %
Series A Investor Ownership 16.67 %
Series A Post-Money Valuation USD 24,000,000.00
Inputs
Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
USD
Total capital raised on the Post-Money SAFE.
USD
Post-Money SAFE valuation cap.
USD
Subsequent priced Series A round investment.
USD
Series A pre-money valuation.
Results & Graph
Post-Series A Founder Ownership
72.92 %
SAFE Ownership at Conversion
12.5 %
Series A Investor Ownership
16.67 %
Series A Post-Money Valuation
USD 24,000,000.00

Post-Series A Founder Ownership

Graph 1 • Safe Investment Amount Sensitivity Recalculates the domain equation across 50% to 150% of the primary input while holding other parameters constant.
0 % 42.2 % 84.4 % 50%: 78.13 % 78.1 50% 75%: 75.52 % 75.5 75% 100%: 72.92 % 72.9 100% 125%: 70.31 % 70.3 125% 150%: 67.71 % 67.7 150%
Graph 2 • Primary & Supporting Metric Comparison Compares the primary output alongside supporting domain benchmarks.
Post-Series A Founder Ownership 72.92 % SAFE Ownership at Conversion 12.5 % Series A Investor Ownership 16.67 % Series A Post-Money Valuation USD 24,000,000.00
Graph 3 • Exact Output Table & Units Displays each calculated output in its exact domain unit.
Post-Series A Founder Ownership72.92 %SAFE Ownership at Conversion12.5 %Series A Investor Ownership16.67 %Series A Post-Money ValuationUSD 24,000,000.00
Summary: SAFE holders convert to 12.5% pre-Series A (10.42% post-Series A), Series A takes 16.67%, leaving founders with 72.92%.
Summary: SAFE holders convert to 12.5% pre-Series A (10.42% post-Series A), Series A takes 16.67%, leaving founders with 72.92%.
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Formula & Mathematical Methodology: SAFE & Note Dilution Mathematical Formula

SAFEOwnership% = SAFEInvestment / PostMoneyValuationCap
SAFE_Ownership% = SAFE_Investment / PostMoneyValuationCap
  • safeInvestmentAmount: Safe Investment Amount (USD)
  • postMoneyValuationCap: Post Money Valuation Cap (USD)
  • seriesANewMoney: Series A New Money (USD)
  • seriesAPreMoneyValuation: Series A Pre Money Valuation (USD)

Rounding: Intermediate calculations retain full IEEE-754 floating-point precision; displayed currency and ratios round to 2 decimal places.

Worked Example: Benchmark Scenario: SAFE & Note Dilution

Model Post-Money SAFE cap and priced Series A round founder dilution.

  1. Enter the portfolio, option, lease, or corporate balance-sheet inputs.
  2. Evaluate the core equation: SAFE_Ownership% = SAFE_Investment / PostMoneyValuationCap.
  3. Inspect the primary valuation output, risk metrics, and 3 visual SVG graphs.
Result: Computes SAFE & Note Dilution using SAFE_Ownership% = SAFE_Investment / PostMoneyValuationCap.

Frequently Asked Questions

How does the Post-Money SAFE & Convertible Note Ownership Dilution Calculator calculate results?

It evaluates SAFE_Ownership% = SAFE_Investment / PostMoneyValuationCap directly in your browser and updates the three domain SVG visualizations immediately as you adjust any input.

Can I compare multiple investment or financing scenarios side by side?

Yes. Click "Compare (0/3)" in the results toolbar to pin up to three scenarios side by side.

Are my financial numbers kept private?

Yes. All calculations run 100% locally in your browser with zero server uploads.

Business & Marketing · Corporate Finance & Equity

Post-Money SAFE & Convertible Note Ownership Dilution Calculator: inputs, method, and how to read the result

Model Post-Money SAFE cap and priced Series A round founder dilution.

Choose inputs for the case you are checking

The defaults are illustrative. Replace them with values for your case and keep the units shown beside each field.

  • Display Currency: Amounts are treated in the selected currency; no foreign-exchange conversion is applied.
  • Safe Investment Amount: Total capital raised on the Post-Money SAFE.
  • Post Money Valuation Cap: Post-Money SAFE valuation cap.
  • Series A New Money: Subsequent priced Series A round investment.

What the calculation includes

With the default values shown, Post-Series A Founder Ownership is 72.92 %. The calculation follows SAFE & Note Dilution Mathematical Formula; the formula and variable definitions above show how the inputs combine.

One-input check: With the other defaults held constant, changing Safe Investment Amount from 1,500,000 USD to 1,650,000 USD changes Post-Series A Founder Ownership from 72.92 % to 71.88 %. This is a comparison inside the calculator's stated model, not a prediction.

Where to use caution

  • Uses standard quantitative finance, GAAP/IFRS operating ratios, and continuous/periodic compounding conventions.
  • For educational and analytical modeling only; consult a licensed CPA, CFA, or fiduciary advisor before executing tax or derivative transactions.

Scope: Global Financial & Corporate Valuation Standard Check the assumptions and limitations against your situation before relying on the estimate.

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