VC & PE Glossary
What Is SAFE Conversion Math?
Updated
Definition
SAFE conversion math is the calculation of how many shares SAFE investors receive at a priced round — applying valuation cap, discount, and post-money vs pre-money mechanics to determine ownership.
Useful for: Founders, Investors
SAFE conversion math determines share count when SAFEs convert at a priced equity financing.
How it works
For each SAFE, compute effective conversion price:
- Cap price = valuation cap ÷ company capitalization definition in the SAFE (often fully diluted excluding converting SAFEs, but read the doc).
- Discount price = priced round PPS × (1 − discount %).
- Conversion price = lower of cap price, discount price, and sometimes round price.
Shares issued = SAFE investment ÷ conversion price.
Example: $1M SAFE, $8M post-money cap. Series A at $2.00/share, 20% discount → discount price $1.60. Cap implies $1.00/share if cap math yields that — investor converts at $1.00, receiving 1M shares.
Post-money SAFEs bake investor ownership at signing (investment ÷ cap = ownership %), shifting how dilution flows among founders, pool, and new money. Stack multiple SAFEs in spreadsheet order matching legal waterfall.
Include option pool increases negotiated in the priced round — they affect everyone’s percentage.
Why it matters
- Founders: Run pro forma before signing term sheet; negotiate pool size and pre-money with conversions visible.
- Investors: Verify cap table exports match legal docs; pro rata side letters depend on correct converted ownership.
Common mistake
Using headline Series A pre-money without subtracting SAFE conversion share count. True economics use fully diluted post-conversion ownership.
Related ideas
See also SAFE, cap table, pre-money valuation, and SAFE note vs equity.
Related terms
- Cap Table — A cap table (capitalization table) is the record of who owns equity in a company — shares, options, warrants, and convertible instruments — and how ownership percentages change after each financing.
- SAFE — A SAFE (simple agreement for future equity) is a Y Combinator-style instrument that invests capital now in exchange for shares later — typically at a priced equity round — without accruing debt interest.
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Common questions
Short answers for founders, LPs, and operators