Convert water mass to volume or volume to mass between grams, kilograms, pounds, ounces, liters, and milliliters using the entered density. The default 1000 g/L gives the approximation 1 g ≈ 1 mL.
Assumptions Assumptions
- The default water density is rounded to 1 g/mL (1000 g/L), including near 4°C; at about 20°C it is roughly 0.9982 g/mL. Enter a more appropriate density when needed.
- 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.
- Temperature and dissolved substances are reflected only through the density you enter; air buoyancy is 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).
L = (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 |
| * This reference table uses 1 L ≈ 1000 g. The calculator defaults to 1000 g/L and lets you enter another density. | |
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
