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Grams per Liter to Grams per cm³ Density Converter

↔ Convert g/cm³ to g/L instead

Common Conversions

g/L g/cm³
0.1 0.0001
0.5 0.0005
1 0.001
2 0.002
5 0.005
10 0.01
25 0.025
50 0.05
100 0.1
1000 1

Why this conversion matters in chemistry

Gas densities and dilute aqueous concentrations live naturally in g/L because the values come out manageable — air at 1.29 g/L, CO₂ at 1.98 g/L, normal serum albumin at 35–50 g/L. Converting to g/cm³ shifts the same number down by a factor of 1000, putting it on the scale chemistry density tables use. The conversion shows up most when comparing a gas-phase density to a liquid-phase reference, or reconciling a clinical-chemistry concentration in g/L with a benchtop density measurement in g/cm³.

Formula

g/cm³ = g/L / 1000

Worked Examples

1000 g/L = 1 g/cm³

The density of water at 4 °C — the conversion's calibration anchor.

1.293 g/L = 0.001293 g/cm³

The density of dry air at old STP (0 °C, 1 atm) — the reference for any gas-density comparison.

1.977 g/L = 0.001977 g/cm³

The density of CO₂ at the same STP conditions — heavier than air, which is why it pools in low spots.

Frequently Asked Questions

How do I convert g/L to g/cm³?
Divide by 1000. The relationship is exact, since 1 liter is exactly 1000 cm³ by definition.
Why are gas densities quoted in g/L?
Gas densities are tiny in g/cm³ — around 0.001 for air. Using g/L pulls the values up to readable numbers like 1.29 for air or 1.98 for CO₂. The natural scale for gas-phase work sits there.
How does gas density connect to molar mass?
At STP, gas density in g/L equals molar mass divided by molar volume (22.414 L/mol at 0 °C, 1 atm). Rearranging: M = density × 22.414. That relationship was historically used to determine the molar mass of unknown gases from a single density measurement.