Enter grams or liters of water to convert between mass and volume using the 1 g ≈ 1 mL assumption.
Assumptions Assumptions
- Pure water is assumed with density ≈ 1 g/mL (1000 g/L), exact at 4°C; at ~20°C it’s about 0.9982 g/mL (≈0.18% difference).
- Conversions are mass-to-volume or volume-to-mass for water only; other liquids require their specific densities.
- SI unit standards: 1 L = 1000 mL; 1 kg = 1000 g; 1 lb = 453.59237 g; 1 oz = 28.349523125 g.
- Effects of temperature, dissolved substances, and air buoyancy are ignored.
When to Use This Calculator
- Converting recipe amounts between grams and liters for water-based ingredients.
- Quick aquarium, hydration, or household measurements where an approximate water density is acceptable.
- Back-of-the-envelope lab or classroom conversions for pure water near room temperature.
Input Definitions
- Mass of Water — enter a value in g, kg, lb, or oz; conversions use: 1 lb = 453.59237 g; 1 oz = 28.349523125 g.
- Volume of Water — enter a value in L or mL; 1 L = 1000 mL.
- Formulas (water, 1 g/mL) — L = g ÷ 1000; g = L × 1000; mL = g; kg = L.
G to L of Water Formula
The following formula converts grams of water to liters using the approximation 1 g = 1 mL (1000 g = 1 L).
\mathrm{L} = \frac{\mathrm{g}}{1000}- Assumed water density: 1 g/mL (1000 g/L).
- 1 L = 1000 mL.
- 1 kg = 1000 g.
- 1 lb = 453.59237 g; 1 oz = 28.349523125 g.
G to L Conversion Table
| Grams (g) | Liters (L) |
|---|---|
| 1 | 0.001 |
| 5 | 0.005 |
| 10 | 0.010 |
| 50 | 0.050 |
| 100 | 0.100 |
| 250 | 0.250 |
| 300 | 0.300 |
| 500 | 0.500 |
| 750 | 0.750 |
| 1000 | 1.000 |
| 1500 | 1.500 |
| 2000 | 2.000 |
| 2500 | 2.500 |
| 3000 | 3.000 |
| 4000 | 4.000 |
| 5000 | 5.000 |
| 7500 | 7.500 |
| 10000 | 10.000 |
| * For water near room temperature: 1 L ≈ 1000 g (calculator uses 1 g/mL). | |
How do you convert grams of water to liters? Divide grams by 1000 to get liters; equivalently convert g → mL (1:1) and then mL → L (÷1000).
How do you convert liters of water to grams? Multiply liters by 1000 to get grams; at the same approximation, L = kg for water.
Example Problem
Convert 2,500 g of water to liters.
Use the formula: L = g ÷ 1000.
L = 2500 ÷ 1000 = 2.5 L
