Pre-Money and Post-Money Valuation Calculator

Pre-Money and Post-Money Valuation

When a startup raises a funding round, two valuations matter: the pre-money valuation (what the company is worth before the investment) and the post-money valuation (what it’s worth after the investment is added).

Formulas:

Post-Money Valuation = Pre-Money Valuation + Investment Amount

Investor Equity % = Investment / Post-Money Valuation

Founder Equity % = Pre-Money Valuation / Post-Money Valuation

Example:

• Pre-money valuation: $8,000,000
• Investment: $2,000,000
• Post-money valuation: $10,000,000
• Investor owns: $2M / $10M = 20%
• Founders retain: $8M / $10M = 80%

Price per share:

If you know the number of shares outstanding before the round:

Price per Share = Pre-Money Valuation / Shares Outstanding (pre-round)

New Shares Issued = Investment / Price per Share

The option pool shuffle, which is the one that costs real money.

Investors almost always require an employee option pool, and they require it to come out of the pre-money valuation. It sounds procedural. It is not. Carving a 15% post-money pool out of an $8M pre-money round does not cost the founders 15% of their remaining stake; it cuts the effective pre-money valuation, so the investor buys their 20% at a lower real price while the founders absorb the whole pool. Enter a pool percentage below and the calculator shows both the founders’ stake with and without it, along with the effective pre-money valuation the investor is really paying.

The negotiating point is not whether to have a pool. You need one to hire. It is whether the pool sits pre-money or post-money, and whether it is sized for the next 12 to 18 months of hiring or padded to whatever number the term sheet arrived with.

Two other terms that outrank the valuation:

• Liquidation preference: investors may take 1x or 2x their money back before founders see anything in an exit. A high valuation with a 2x participating preference can pay the founders less than a lower valuation with a 1x non-participating one.
• Anti-dilution provisions: these protect investors if a future round prices lower (a down round). Full-ratchet is punitive; broad-based weighted average is the market standard.

Typical valuation benchmarks:

Valuations vary enormously by sector, traction, team, and market conditions.

Key insight: The pre-money and post-money distinction matters most when someone quotes you an ownership percentage. Always confirm which valuation they are working from before you agree to anything.