Pre and Post Money Valuation Calculator - Pre-Money, Post-Money, Dilution

A pre and post money valuation calculator turns a new investment and the investor's equity percent into the company's pre-money valuation, post-money valuation, and founder-side dilution. Use it when sizing a priced round, comparing term sheets, stress-testing a SAFE cap, or reading a venture term sheet. The output starts a conversation with lawyers and lead investors - it does not replace them.

• • Priced equity rounds: Translate a dollar investment and a percent ownership on a term sheet into pre-money, post-money, and price per share.
• • SAFE cap sanity check: Test how a SAFE valuation cap would convert against a priced lead round before signing a side letter.
• • Dilution review: See how much of the cap table existing holders keep when a new investor takes a given slice.
• • Scenario planning: Compare a flat, up, or down round without rebuilding a full cap table.

Pre-money and post-money valuation are usually quoted together because the difference between them is exactly the new cash. That connection makes the math small enough to run by hand, but the small formulas get confused surprisingly often when term sheets mix SAFE caps, discount rates, and conversion mechanics in the same paragraph.

Once the post-money cash and valuation are in front of you, the Free Cash Flow Calculator can help you check whether the new round actually supports the operating plan you are funding.

The calculator runs the same three-step identity that venture term sheets use, then extends it with a price-per-share block when you supply a pre-money share count.

• Investment: New cash coming onto the balance sheet in this round, in your reporting currency.
• Investor ownership %: Post-money equity percent the new investor will hold after the round closes.
• Pre-money shares: Total fully diluted shares outstanding immediately before the round, used to derive the price per share.
• Post-money valuation: Total implied value of the company after the cash lands.
• Pre-money valuation: Implied value of the company right before the new cash arrives.
• Price per share: Pre-money valuation divided by pre-money shares; the price the new investor is effectively paying per share.

The first step is the identity that ties every term sheet together: the new cash divided by the post-money ownership percent equals the post-money valuation. It holds for priced rounds, SAFE conversions, or follow-ons, as long as the ownership percent is read on a post-money basis.

According to Investopedia, post-money valuation equals the new investment divided by the percentage of equity the investor receives, and pre-money valuation equals post-money valuation minus the new investment.

According to CB Insights, a startup raising $10 million for 20 percent of the company implies a $50 million post-money valuation and a $40 million pre-money valuation.

When the headline pre-money number needs to be defended with a multiple or a market view, the Business Valuation Calculator can help benchmark it against a revenue or EBITDA multiple.

These four concepts cover the most common confusion on a venture term sheet, and they are what a pre and post money valuation calculator leans on.

Two common misunderstandings sit on top of these concepts. The first is mixing pre-money and post-money ownership percent: a 20 percent pre-money stake is not the same as a 20 percent post-money stake.

When a private company later goes public, the Market Capitalization Calculator applies the same price times shares identity to a public share count instead of a fully diluted private one.

Fill the round in the same order a term sheet presents it, starting with the cash and the post-money ownership percent that defines the round.

1. 1 Enter the new investment amount: Use the actual cash that will be wired into the company in this round, not the value of any notes or SAFEs converting in the same closing.
2. 2 Enter the post-money ownership percent: Type the percent of the post-money company the investor will own, like 20 for a 20 percent post-money stake.
3. 3 Add the pre-money share count: Use fully diluted shares immediately before the round, including the option pool and any notes that convert at this closing. Leave at 0 to skip price-per-share outputs.
4. 4 Read the headline valuations: Check that the post-money minus the investment equals the pre-money valuation. That quick check is the same check an investor's associate runs first.
5. 5 Read the share mechanics: When shares are entered, compare the implied price per share with the price the lead investor is offering. A large gap usually means option pool refresh, SAFEs, or convertible notes are doing extra work.
6. 6 Run a downside: Re-enter a flat or down round by lowering the post-money ownership percent the investor would demand, then compare founder ownership with the upside case.

A founder is raising a $3 million seed extension at a $12 million post-money (25 percent post-money) on 8 million pre-money shares. The pre and post money valuation calculator shows pre-money of $9 million, price per share of $1.125, and 2,666,667 new shares, taking the post-money share count to 10,666,667. Existing holders keep 75 percent of a $12 million post-money company, worth $9 million - which is the pre-money, confirming the math is consistent.

Once the price per share is on screen, the Price Per Share Calculator can apply that price to any specific lot size, such as an option grant or a secondary sale.

A pre and post money valuation calculator gives founders and operators a small, auditable place to test round assumptions before they hit a board deck.

• • Defends the term sheet: Translates the cash and percent on a term sheet into the two numbers a board cares about - pre-money and post-money - in one screen.
• • Surfaces dilution early: Shows how much of the cap table the new investor takes and how much the founder block keeps, before any legal documents are drafted.
• • Tests SAFE cap options: Lets you compare a SAFE cap against a priced lead round using the same percent ownership, so the trade-off between cap size and conversion mechanics is visible.
• • Anchors price per share: Derives the implied price per share from the pre-money valuation and current share count, which is the number option grants and notes will reference.
• • Supports scenario reviews: Run an upside, base, and downside in seconds by changing the post-money ownership percent, then keep the numbers consistent across the cap table.

The biggest practical win is consistency. A single identity is the source of truth for every output, so the pre-money, post-money, price per share, and dilution numbers cannot drift apart as assumptions change.

If the pre-money number needs to be justified beyond market comps, the DCF Calculator can run a discounted cash flow on the same company to back-stop the valuation.

A pre and post money valuation calculator is built from a small identity, but several real-world factors change what the numbers actually mean in a round.

• • The calculator assumes the post-money ownership percent is the only equity changing in the round. Option pool refresh, note conversions, and SAFE conversions can each change the share count before the new cash arrives.
• • The implied price per share is a fully diluted figure, so it can differ from the per-share price in a term sheet that uses a different share definition.
• • The output is a calculation aid, not investment, legal, or tax advice, and a real round should be modeled on a full cap table before documents are signed.

When the term sheet says pre-money, check whether the option pool refresh is inside or outside the pre-money. Inside the pool means founders absorb the dilution from a larger option pool, which lowers the effective pre-money valuation even when the headline number looks the same.

According to Y Combinator Post-Money SAFE, the post-money safe is one where safe holder ownership is measured after the safe money is accounted for, which is why the headline cap maps to a different share count than a priced round with the same number.

If the round is being justified against a required return, the Cost of Capital Calculator can convert the discount rate assumption into a weighted cost of capital for the same company.