Last Updated on 28 February, 2026 by Abrahamtolle

Determining your S&P 500 investment returns is crucial for financial planning. Using our s p 500 return calculator, you can gauge both historical performance and future potential. This article guides you through the process, ensuring you maximize the tool for accurate portfolio analysis.

The following calculator provides nominal, real, and total real returns for the S&P 500 Index going back to 1871 till today (see latest date available below). To calculate the returns we used the data available in Robert Shiller’s website.