Length of Solar Day Formula

Equation for calculate length of solar day is,

$$\mathrm{length\; of\; solar\; day}=\frac{\mathrm{length\; of\; sidereal\; day}}{1-\frac{\mathrm{length\; of\; sidereal\; day}}{\mathrm{orbital\; period}}}$$

where,
orbital period = the orbital period is the time taken for a given object to make one complete orbit around another object
Sidereal days = sidereal days compared to solar days on other planets