The new service is available from 1 January, Fidelity said in a note on its website.

Clients of advisors and brokers who had not previously been eligible to convert non-Roth retirement assets, like those found in a Traditional IRA or 401 with a former employer, into a Roth IRA, may now have the opportunity to do so, the firm said.

“With the online calculator advisors can walk their clients through a series of questions to help determine if converting to a Roth IRA may be appropriate and then assess whether or not to conduct a full or partial conversion,” it said.

The online Roth IRA conversion calculator is part of a comprehensive set of educational and decision-support resources designed specifically for advisors and brokers.