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We develop the interface tool $\verb|wan2respack|$, which connects$\verb|RESPACK|$ (software that derives the low-energy effective Hamiltoniansof solids) with $\verb|Wannier90|$ (software that constructs Wannierfunctions). $\verb|wan2respack|$ converts the Wannier functions obtained by$\verb|Wannier90|$ into those used in $\verb|RESPACK|$, which is then used toderive the low-energy effective Hamiltonians of solids. In this paper, weexplain the basic usage of $\verb|wan2respack|$ and show its application tostandard compounds of correlated materials, namely, the correlated metalSrVO$_3$ and the high-$T_{c}$ superconductor La$_2$CuO$_4$. Furthermore, wecompare the low-energy effective Hamiltonians of these compounds using Wannierfunctions obtained by $\verb|Wannier90|$ and those obtained by$\verb|RESPACK|$. We confirm that both types of Wannier functions give the sameHamiltonians. This benchmark comparison demonstrates that $\verb|wan2respack|$correctly converts Wannier functions in the $\verb|Wannier90|$ format intothose in the $\verb|RESPACK|$ format.

Interface tool from Wannier90 to RESPACK: wan2respack