Finance

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Pre and Post Money Valuation Calculator.

Calculate pre-money and post-money valuation from investment and ownership.

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Post-money valuation: $1,000,000.00 $

Post-money valuation

$1,000,000.00$
Investor ownership: 10.00%

Investor ownership

10.00%
Existing ownership: 90.00%

Existing ownership

90.00%

FAQs

How does the pre and post money valuation calculator work?

Enter the requested values to receive a deterministic result. No live market, tax, or jurisdiction data is inferred.

Cite this calculator

Canonical URL: https://mathify.one/ru/finance/pre-and-post-money-valuation

Cite as: Mathify. (2026). Pre and Post Money Valuation Calculator. https://mathify.one/ru/finance/pre-and-post-money-valuation

Use Cases

Startup Funding Rounds

Founders and investors can quickly determine the post-money valuation and the equity dilution for a new investment round.

Example: Pre-money $5M, new investment $1M → post-money $6M, investor gets 16.67%.

Negotiating Investment Terms

Entrepreneurs can model different investment amounts to see how ownership percentages change, helping them negotiate fair terms.

Example: Compare a $500K vs $1M investment at a $4M pre-money valuation.

Frequently Asked Questions

What is the difference between pre-money and post-money valuation?
Pre-money valuation is the company's value before receiving new investment. Post-money valuation is the value after the investment is added. It is calculated as pre-money valuation plus the new investment amount.
How is ownership percentage calculated?
The investor's ownership percentage is calculated by dividing the new investment by the post-money valuation. The founders' ownership is the remaining percentage, which is pre-money valuation divided by post-money valuation.
Can this calculator be used for any type of investment?
Yes, it works for any equity investment where you know the pre-money valuation and the amount of new investment. It is commonly used for startup funding rounds, but it applies to any private company investment.

Tips & Common Mistakes

Tips

  • Ensure you use the same currency for both pre-money valuation and new investment.
  • Remember that post-money valuation is simply pre-money plus the new investment.
  • Use this calculator to compare different investment scenarios before finalizing a deal.
  • Double-check your inputs to avoid errors in ownership percentages.

Common Mistakes to Avoid

  • Confusing pre-money and post-money valuation when calculating ownership.
  • Using the post-money valuation as the pre-money for the next round without adjusting for new shares.
  • Forgetting to include all new investment amounts, such as convertible notes converting to equity.

Last updated: August 13, 2026