Convert grams of water to milliliters instantly. Water has a density of 1.00 g/ml, making it the simplest gram to ml conversion. Free online calculator.
Converting grams of water to milliliters is the simplest case in the gram-to-ml world. Water has a density of 1.00 g/ml at room temperature, which means 1 gram of water = 1 milliliter. No math needed — the numbers are the same.
This 1:1 ratio is why water is the reference substance for density. Every other ingredient's conversion factor is compared against it. Use our gram to ml converter to convert water or any of the other 17 ingredients we support.
For water, the formula is straightforward: ml = grams ÷ 1.00. Since the density is 1, the volume in milliliters equals the mass in grams exactly.
Volume [ml] = Mass [g] ÷ 1 [g/ml] Mass [g] = Volume [ml] × 1 [g/ml] Quick reference table for converting water between grams and milliliters (density: 1 g/ml).
| Water (grams) | Volume (ml) |
|---|---|
| 1 g | 1 ml |
| 5 g | 5 ml |
| 10 g | 10 ml |
| 50 g | 50 ml |
| 100 g | 100 ml |
| 150 g | 150 ml |
| 200 g | 200 ml |
| 250 g | 250 ml |
| 500 g | 500 ml |
| 1000 g | 1000 ml |
Grams (g) measure <strong>weight</strong>. Milliliters (ml) measure <strong>volume</strong>. To convert between them, you need the <strong>density</strong> of the substance. This converter does it instantly.
Select from 17 common cooking and baking ingredients - or enter a custom density value for any substance.
Pick the weight unit (grams, kg, oz) and volume unit (ml, liters, cups) you need for the conversion.
Enter a value in either field and the calculator instantly converts it. Works both ways - gram to ml or ml to grams.
At room temperature (around 20°C), the density of water is 0.9982 g/ml — extremely close to 1. For cooking and everyday use, 1 gram of water equals 1 ml. For precise scientific work, the slight difference may matter at extreme temperatures.
250 grams of water equals 250 ml. Since water's density is 1.00 g/ml, the mass in grams and volume in milliliters are the same number.
Yes, slightly. At 4°C water is at its densest (1.0000 g/ml). At boiling (100°C), it drops to 0.9584 g/ml. For kitchen use, the difference is negligible. For lab work, account for temperature.
The metric system was originally designed so that 1 ml of water weighs exactly 1 gram. This makes water the reference point for all density-based conversions.