About Us
portfolios.tools is a free, open-access platform providing financial calculators and simulators for DIY investors. We believe that powerful financial tools should be accessible to everyone: not just those who can afford expensive software or advisory fees.
Our calculators run entirely in your browser. No data is sent to any server. No accounts required. No hidden costs. We built this platform to democratize access to financial math, helping you make informed decisions about your money.
Whether you are rebalancing a portfolio, comparing compound interest scenarios, computing bond yields, or tracking dividend calendars: our tools give you instant, accurate results without ever leaving your browser.
Editorial approach
Each calculator explains its formula, assumptions, limitations, and related tools. The site is maintained as an educational resource. Calculations are reviewed against the stated formula, but they are not personal financial, tax, or legal advice.