Senāk latvieši tilpumu mērīja siekos, riekšavās, tīnēs, pūros, cibās, stopos, karotēs.
1 tīne = 3 pūri = 9 sieki = 720 riekšavas = 162 stopi = 208 litri.
Daudzi no senajiem mēriem sen jau aizmirsti.
Starptautiskajā vienību sistēmā tilpuma pamatvienība ir kubikmetrs $\left[{m}^{3}\right]$.

Sadzīvē sastopama tilpuma vienība ir litrs $\left[l\right]$. Tā nosaukta franču vīndara Litra vārdā.
Litrs ir kubikdecimetrs: $1\phantom{\rule{0.147em}{0ex}}l\phantom{\rule{0.147em}{0ex}}=1\phantom{\rule{0.147em}{0ex}}{\mathrm{dm}}^{3}$
Mērcilindru iedaļas parasti ir izteiktas mililitros (ml): $1\phantom{\rule{0.147em}{0ex}}\mathrm{ml}=1\phantom{\rule{0.147em}{0ex}}{\mathrm{cm}}^{3}$.
Fizikā ir svarīga prasme pāriet no vienas mērvienības uz citu. Izpēti sekojošas sakarības:

$\begin{array}{l}1\phantom{\rule{0.147em}{0ex}}{\mathrm{m}}^{3}=10\phantom{\rule{0.147em}{0ex}}\mathrm{dm}\cdot 10\phantom{\rule{0.147em}{0ex}}\mathrm{dm}\cdot 10\phantom{\rule{0.147em}{0ex}}\mathrm{dm}=1000\phantom{\rule{0.147em}{0ex}}{\mathrm{dm}}^{3}\\ \\ 1\phantom{\rule{0.147em}{0ex}}{\mathrm{m}}^{3}=100\phantom{\rule{0.147em}{0ex}}\mathrm{cm}\cdot 100\phantom{\rule{0.147em}{0ex}}\mathrm{cm}\cdot 100\phantom{\rule{0.147em}{0ex}}\mathrm{cm}\phantom{\rule{0.147em}{0ex}}=1000\phantom{\rule{0.147em}{0ex}}000\phantom{\rule{0.147em}{0ex}}{\mathrm{cm}}^{3}\\ \\ 1\phantom{\rule{0.147em}{0ex}}{\mathrm{m}}^{3}=1000\phantom{\rule{0.147em}{0ex}}\mathrm{mm}\cdot 1000\phantom{\rule{0.147em}{0ex}}\mathrm{mm}\cdot 1000\phantom{\rule{0.147em}{0ex}}\mathrm{mm}\phantom{\rule{0.147em}{0ex}}=1000\phantom{\rule{0.147em}{0ex}}000\phantom{\rule{0.147em}{0ex}}000\phantom{\rule{0.147em}{0ex}}{\mathrm{mm}}^{3}\end{array}$
$1\phantom{\rule{0.147em}{0ex}}{\mathrm{dm}}^{3}=\frac{1}{10}\phantom{\rule{0.147em}{0ex}}m\cdot \frac{1}{10}\phantom{\rule{0.147em}{0ex}}m\cdot \frac{1}{10}\phantom{\rule{0.147em}{0ex}}m=\frac{1}{1000}\phantom{\rule{0.147em}{0ex}}{m}^{3}=0,001\phantom{\rule{0.147em}{0ex}}{m}^{3}$

$1\phantom{\rule{0.147em}{0ex}}{\mathrm{cm}}^{3}=\frac{1}{100}\phantom{\rule{0.147em}{0ex}}m\cdot \frac{1}{100}\phantom{\rule{0.147em}{0ex}}m\cdot \frac{1}{100}\phantom{\rule{0.147em}{0ex}}m=\frac{1}{1000\phantom{\rule{0.147em}{0ex}}000}\phantom{\rule{0.147em}{0ex}}{m}^{3}=0,000\phantom{\rule{0.147em}{0ex}}001\phantom{\rule{0.147em}{0ex}}{m}^{3}$

$1\phantom{\rule{0.147em}{0ex}}{\mathrm{mm}}^{3}=\frac{1}{1000}\phantom{\rule{0.147em}{0ex}}m\cdot \frac{1}{1000}\phantom{\rule{0.147em}{0ex}}m\cdot \frac{1}{1000}\phantom{\rule{0.147em}{0ex}}m=\frac{1}{1000\phantom{\rule{0.147em}{0ex}}000\phantom{\rule{0.147em}{0ex}}000}\phantom{\rule{0.147em}{0ex}}{m}^{3}=0,000\phantom{\rule{0.147em}{0ex}}000\phantom{\rule{0.147em}{0ex}}001\phantom{\rule{0.147em}{0ex}}{m}^{3}$

Uzziņai dažas angļu nemetriskās tilpuma vienības:
Akrpēda = 1233,48 ${m}^{3}$
Kubikcolla = 16,39 ${\mathrm{cm}}^{3}$
Naftas barels = 158,99 ${\mathrm{dm}}^{3}$
Bušelis (ASV) = 35,24 ${\mathrm{dm}}^{3}$
Šķidrumu galons (ASV) = 3,78 ${\mathrm{dm}}^{3}$
Pinte = 0,57 ${\mathrm{dm}}^{3}$

Atsauce:
Lietišķā fizika/.Leonīds Antons. Rīga - Zvaigzne 1994. izmantotā literatūra 1.lpp.