Stock Average Calculator
Calculate your average cost per share across multiple buys (averaging down or up), with total shares, total invested and break-even price. Free, private, instant.
Privacy & Security
All processing happens locally in your browser — nothing is uploaded.
How to Use
Add a row for each purchase with its price and number of shares. The average updates live.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
Related Tools
Compound Interest Calculator
FinanceCalculate future value with compound interest including monthly contributions. Visual breakdown bar and year-by-year amortization table.
Mortgage Calculator
FinanceCalculate monthly mortgage payments including principal, interest, taxes, insurance, and HOA fees. Full amortization schedule included.
EMI Calculator
FinanceCalculate Equated Monthly Installments for loans. Shows principal, interest breakdown, total amount, and full amortization schedule.