Seed Round Dilution Calculator

Seed round dilution refers to the reduction in founders ownership when investors receive new shares for capital. Understanding dilution helps founders plan equity across multiple funding rounds

The calculator uses the standard published formula for seed dilution calc. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Post-money valuation = Pre-money + Investment. Each step in the calculation is shown so you can verify the result manually.