# mL to Grams Calculator

Convert milliliters to grams for water, milk, honey, oil, flour, sugar, and custom substances. Uses density to give accurate weight from volume.

## What this calculates

Convert milliliters to grams quickly using the density of your substance. Because different liquids and powders have different densities, 100 mL of honey weighs a lot more than 100 mL of flour. Pick a common substance or enter a custom density.

## Inputs

- **Volume** (mL) — min 0 — Enter the volume in milliliters.
- **Substance** — options: Water (1.00 g/mL), Whole Milk (1.03 g/mL), Honey (1.42 g/mL), Olive Oil (0.92 g/mL), Flour (0.53 g/mL), Granulated Sugar (0.85 g/mL), Custom Density — Pick a common substance or choose custom to enter your own density.
- **Custom Density** (g/mL) — min 0.01, max 25 — Density in grams per milliliter. Only used when 'Custom' is selected.

## Outputs

- **Weight (Grams)** (g) — Mass of the substance in grams.
- **Weight (Ounces)** (oz) — Mass in ounces (1 oz = 28.3495 g).
- **Weight (Kilograms)** (kg) — Mass in kilograms.
- **Density Used** (g/mL) — The density value used for this conversion.

## Details

The relationship between milliliters and grams depends entirely on what you're measuring. A milliliter is a unit of volume, while a gram is a unit of mass. They're only equal for water at standard conditions.

**Formula:** Grams = Milliliters x Density (g/mL)

**Common Substance Densities:**

| Substance | Density (g/mL) | 100 mL = |
|-----------|---------------|----------|
| Water | 1.00 | 100 g |
| Whole Milk | 1.03 | 103 g |
| Honey | 1.42 | 142 g |
| Olive Oil | 0.92 | 92 g |
| Flour | 0.53 | 53 g |
| Granulated Sugar | 0.85 | 85 g |

This distinction matters a lot in cooking and baking, where recipes might call for ingredients by volume (cups, mL) or by weight (grams). Weighing ingredients is generally more accurate than measuring by volume, especially for dry goods like flour that compress easily.

**Why not just assume 1 mL = 1 g?** That only works for water. Honey is 42% heavier per milliliter, while flour is nearly half as heavy. Using the wrong conversion can throw off a recipe significantly.

## Frequently Asked Questions

**Q: Is 1 mL always equal to 1 gram?**

A: No. 1 mL equals 1 gram only for water at 4 degrees Celsius. For every other substance, you need to multiply the volume by its density. Honey at 1.42 g/mL means 1 mL weighs 1.42 grams, while flour at 0.53 g/mL means 1 mL weighs only 0.53 grams.

**Q: How do I find the density of a substance?**

A: Check the product label or a reference table. For common kitchen ingredients, the densities are well established. For chemicals, look up the Safety Data Sheet (SDS). You can also measure it yourself by weighing a known volume of the substance.

**Q: Why do recipes use grams instead of milliliters?**

A: Weight measurements (grams) are more consistent than volume measurements (mL or cups). A cup of flour can vary by 20-30% depending on how tightly it's packed. Weight doesn't change regardless of how you scoop or settle the ingredient, so professional bakers almost always measure by weight.

**Q: How do I convert grams back to mL?**

A: Divide the weight in grams by the density. For example, 142 grams of honey divided by 1.42 g/mL = 100 mL. The formula is: mL = grams / density.

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Source: https://vastcalc.com/calculators/conversion/ml-to-grams
Category: Conversion
Last updated: 2026-04-08