Have you seen the DCA Dollar Cost Average calculator?

It allows you to input a date and amount, then shows you the potential value of your savings over time.

This tool is useful for illustrating how small, consistent savings can add up significantly. It can also motivate those who haven't started saving yet by demonstrating the potential savings they could have achieved with a regular savings plan, such as $50 per month.

Additionally, it's a great way for savers to indulge in “what if” scenarios, imagining the potential returns they could have earned if they had started saving earlier.
https://dcabtc.com