# add vertical space between equations

I am using the following code to combine two equations with one number in parentheses but the two equations are very close to each other and using '\vspace{} not working

How can i add a vertical space between these two equations ?

\begin{aligned} T_{P} = K_{T}. \rho . n^{2}_{p} . D^{4}_{p} \\ Q_{P} = K_{Q}. \rho . n^{2}_{p} . D^{5}_{p} \end{aligned}


## 2 Answers

You can manually add a vertical distance to each line-break. I hope, this is what you want.

% arara: pdflatex

\documentclass{article}
\usepackage{mathtools}

\begin{document}
\setcounter{equation}{2}
\begin{aligned} T_{P} &= K_{T}. \rho . n^{2}_{p} . D^{4}_{p} \\[1pt] Q_{P} &= K_{Q}. \rho . n^{2}_{p} . D^{5}_{p} \\[10pt] N_{P} &= K_{N}. \rho . n^{2}_{p} . D^{6}_{p} \\[100pt] K_{P} &= K_{K}. \rho . n^{2}_{p} . D^{7}_{p} \end{aligned}
\end{document}


• @AmeenMohamedBassam Glad to hear that. You are welcome. – LaRiFaRi Jan 20 '15 at 11:16
• Do you know what the default is? – theonlygusti Sep 20 '17 at 16:17
• @theonlygusti that should be 1\jot – LaRiFaRi Sep 21 '17 at 16:00

You can also modify the length \jot if you don't want to manually specify the skips for each line. For example

\setlength{\jot}{10pt}


If you want the change to be localised to that equation, insert the line inside the equation environment, as in the following example

\documentclass{article}
\usepackage{mathtools}

\begin{document}

an equation with more spacing

\setlength{\jot}{10pt} \begin{aligned} T_{P} &= K_{T}. \rho . n^{2}_{p} . D^{4}_{p} \\ Q_{P} &= K_{Q}. \rho . n^{2}_{p} . D^{5}_{p} \\ N_{P} &= K_{N}. \rho . n^{2}_{p} . D^{6}_{p} \\ K_{P} &= K_{K}. \rho . n^{2}_{p} . D^{7}_{p} \end{aligned}

and a normal one

\begin{aligned} T_{P} &= K_{T}. \rho . n^{2}_{p} . D^{4}_{p} \\ Q_{P} &= K_{Q}. \rho . n^{2}_{p} . D^{5}_{p} \\ N_{P} &= K_{N}. \rho . n^{2}_{p} . D^{6}_{p} \\ K_{P} &= K_{K}. \rho . n^{2}_{p} . D^{7}_{p} \end{aligned}

\end{document}


Output

• @AmeenMohamedBassam You are welcome. – karlkoeller Jan 21 '15 at 11:47
• This isn't working on math stackexchange. – Kyle Delaney Sep 26 '17 at 14:39
• Not working. I can see no changes in the final output. – Antonio Sesto Oct 23 '17 at 13:23