# Ownbox_SAFE_Dilution_Calculator

Updated: 2026-11-02

Sheet: SAFE Tranches
OWNBOX / SAFE DILUTION CALCULATOR
Proposed YC-style post-money SAFE caps, not company appraisals. Input cells in blue; formulas in black. No investors committed.
Columns: Tranche | Funding amount ($) | Post-money valuation cap ($) | Target month | Implied cap-based ownership | Status | Formula
Tranche: First | Funding amount ($): 400000 | Post-money valuation cap ($): 11000000 | Target month: Nov 2026 | Implied cap-based ownership: 0.036364 | Status: Proposed / not committed | Formula: 0.036364
Tranche: Second | Funding amount ($): 350000 | Post-money valuation cap ($): 13000000 | Target month: Dec 2026 | Implied cap-based ownership: 0.026923 | Status: Proposed / not committed | Formula: 0.026923
Tranche: Final | Funding amount ($): 250000 | Post-money valuation cap ($): 15000000 | Target month: Jan 2027 | Implied cap-based ownership: 0.016667 | Status: Proposed / not committed | Formula: 0.016667
Tranche: TOTAL RAISE / OWNERSHIP | Funding amount ($): 1000000 | Implied cap-based ownership: 0.079953
Tranche: EFFECTIVE BLENDED CAP ($) | Funding amount ($): 12507288.629738
Tranche: Founder/other preexisting ownership | Implied cap-based ownership: 0.920047
Tranche: Simplifying assumption | Funding amount ($): Ownership estimates are investment/cap under the stated post-money SAFEs, assuming cap-based conversion. Later round financing, stock options, other notes, conversion terms and low-priced rounds may alter actual ownership.
Tranche: No signed side letters | Funding amount ($): MFN and pro rata proposals from earlier drafts are not included in this calculator or guaranteed. Only executed documents govern.
Sheet: Cap Comparisons
SIMPLE SAFE CAP COMPARISONS
Mathematical dilution examples only. Single-cap examples are NOT alternate offerings or a formal valuation.
Columns: Total SAFE cash raised ($) | Hypothetical post-money cap ($) | Implied cap-based % | Remaining pre-existing % | Status
Total SAFE cash raised ($): 1000000 | Hypothetical post-money cap ($): 10000000 | Implied cap-based %: 0.1 | Remaining pre-existing %: 0.9 | Status: Illustrative single-cap scenario
Total SAFE cash raised ($): 1000000 | Hypothetical post-money cap ($): 12500000 | Implied cap-based %: 0.08 | Remaining pre-existing %: 0.92 | Status: Illustrative single-cap scenario
Total SAFE cash raised ($): 1000000 | Hypothetical post-money cap ($): 15000000 | Implied cap-based %: 0.066667 | Remaining pre-existing %: 0.933333 | Status: Illustrative single-cap scenario
Total SAFE cash raised ($): 1000000 | Hypothetical post-money cap ($): 18000000 | Implied cap-based %: 0.055556 | Remaining pre-existing %: 0.944444 | Status: Illustrative single-cap scenario
Total SAFE cash raised ($): IMPORTANT | Hypothetical post-money cap ($): These scenarios show simplified cap-based percentages before a future priced financing; no return, valuation or ownership is guaranteed.
Sheet: Sources and Caveats
SAFE SOURCES AND RISK CAVEATS
Use this workbook for arithmetic, not to offer or sell securities.
Reference | Source or URL | Status
YC SAFE guide | https://www.ycombinator.com/safe | Public source
Founder terms | Proposed $400K@$11M, $350K@$13M, $250K@$15M | Unexecuted internal proposal
SEC Rule 506(c) | https://www.sec.gov/resources-small-businesses/exempt-offerings/general-solicitation-rule-506c | Verification required
Risk note | A SAFE cap is not a company valuation or guaranteed share price. | Illustrative analysis
Document status | All terms subject to issuer acceptance and definitive signed agreement. | Proposed