Grams per cm³ to Grams per Liter Density Converter
Common Conversions
| g/cm³ | g/L |
|---|---|
| 0.001 | 1 |
| 0.005 | 5 |
| 0.01 | 10 |
| 0.05 | 50 |
| 0.1 | 100 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 5 | 5000 |
| 10 | 10000 |
Why this conversion matters in chemistry
Solvent density tables run in g/cm³ at 20 °C — water at 0.998, methanol at 0.791, dichloromethane at 1.326. Gas-phase work and dilute aqueous concentrations live in g/L. Multiplying by 1000 brings a liquid density up to the same scale: DCM at 1326 g/L sits a thousand-fold above CO₂ vapor at about 2 g/L, which is most of why a gas-phase mass-balance feels different from a liquid one. The conversion is also the routine step when a chemistry-table density has to feed a volumetric reagent-charge calculation expressed in g/L.
Formula
Where the factor comes from
The entire factor comes from cubing a length ratio. A decimeter is ten centimeters, so a cubic decimeter holds 10³ cubic centimeters, and since 1964 the liter has been defined as exactly one cubic decimeter. Grams sit unchanged in the numerator, so g/cm³ multiplied by 1000 cm³ per liter gives g/L with the volume unit doing all the work. The result is an exact integer twice over: the metric prefixes are defined quantities, and the liter-to-cubic-decimeter equality is a definition rather than a measured agreement. Both sides describe mass per unit volume of the same material, so this is a rescaling and not a change of physical quantity — which is why the factor stays clean while density, the thing being rescaled, does not.
Precision and significant figures
The 1000 introduces no rounding, so significant figures survive intact: 0.001293 g/cm³ carries four figures and 1.293 g/L carries the same four. Precision is won or lost in the density measurement instead. Liquid densities move roughly 0.02 to 0.1 percent per degree depending on the substance, so a value quoted past three decimals without a stated temperature is unusable; water alone falls 0.29 percent between 4 and 25 °C. Gases are less forgiving still, scaling with pressure and inversely with absolute temperature, so a vapor density in g/L means nothing unless the conditions travel with it. Two or three figures is honest for most bench work.
Worked Examples
Water density at 4 °C — the conversion's calibration anchor.
Air density at old STP (0 °C, 1 atm) — illustrating how gas-phase values fall when scaled out of g/cm³.
The crystallographic density of solid sodium chloride — useful as a reference for any halite-related calculation.
Common mistakes
Gas density quoted without temperature and pressure
A liquid density shifts by fractions of a percent across a working range; a gas density triples between 1 and 3 atm. Air is 1.293 g/L at 0 °C and one atmosphere but nearer 1.18 g/L at 25 °C. A vapor density in g/L with no conditions attached cannot support a quantitative calculation, however many digits it carries.
Solution concentration in g/L is not density
g/L does double duty: it labels the density of a bulk phase and, far more often in solution work, the mass of solute per liter of solution. Converting a solvent's 0.79 g/cm³ into 790 g/L says nothing about how much of anything is dissolved in it. Check which quantity a g/L figure describes before it enters a mass balance.
The three-decade jump sliding by unnoticed
Condensed-phase densities in g/L run from about 600 for light hydrocarbons to a few thousand for dense solids, while gases at ambient pressure sit at or below about 10 g/L even for heavy ones. The two bands are roughly three decades apart. A liquid emerging at 1.3 g/L, or a gas at 1300, means the factor was applied in the wrong direction.