What is the density of water in kg/m³?

Pure water at 4°C has a density of exactly 1000 kg/m³, or equivalently 1 g/cm³ and 1 g/mL. This is why g/cm³ and g/mL are equal — 1 cm³ of water weighs 1 gram.

What is the difference between g/cm³ and g/mL?

They are exactly equal. One millilitre (mL) is defined as one cubic centimetre (cm³), so g/cm³ and g/mL represent the same density. Both equal 1000 kg/m³.

How do I convert lb/ft³ to kg/m³?

Multiply lb/ft³ by 16.0185. For example, 62.4 lb/ft³ × 16.0185 = 999.6 kg/m³, approximately the density of water.

What does a density greater than 1 g/cm³ mean?

A substance with density greater than 1 g/cm³ will sink in pure water. Most metals, rocks, and many plastics are denser than water. Ice is less dense than liquid water (0.917 g/cm³), which is why it floats.

What is the density of air in kg/m³?

Dry air at sea level and 15°C has a density of about 1.225 kg/m³ — roughly 800 times less dense than water. This is why objects float in water more easily than in air.

Conversions

↵ to calculate

Density Converter - kg/m3 lb/ft3 g/cm3 Conversion Online

Convert between kg/m³, g/cm³, g/L, mg/mL, lb/ft³, lb/in³, oz/in³, and oz/gal instantly.

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How to use this calculator

👉 Fill in the boxes below and your answer appears instantly — no maths needed, we do it all for you! 🎉

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In plain English — what does this do?

📏 Some countries say ‘30 degrees’ and others say ‘86 degrees’ for the same weather! Some say ‘5 km’, others say ‘3 miles’. This tool swaps between them instantly so you always know what it means.

📌 Direct Answer & Summary

A density converter lets you switch between different units of density — mass per unit volume — used across science, engineering, cooking, and industry. The SI unit is kilograms per cubic metre (kg/m³), but grams per cubic centimetre (g/cm³) is common in chemistry, while pounds per cubic foot (lb/ft³) is widely used in construction and materials.

Value

From

What is Density Converter - kg/m3 lb/ft3 g/cm3 Conversion Online?

How to use it

1️⃣ Enter the density value in the Value field.
2️⃣ Select the unit you are converting from in the From dropdown.
3️⃣ Select the unit you want to convert to in the To dropdown.
4️⃣ The result and a full table of all equivalent densities appear instantly.
5️⃣ Click the swap button to reverse the conversion.

Formula

converted = input_value * (factor_of_from_unit / factor_of_to_unit), where all factors are expressed relative to kg/m³

💡 See it in action — a real example

Water has a density of 1 g/cm³ = 1000 kg/m³ = 62.428 lb/ft³. To convert 8.05 lb/ft³ to kg/m³: 8.05 / 0.0624279606 = 128.93 kg/m³.

❓ Common questions

What is the density of water in kg/m³?: Pure water at 4°C has a density of exactly 1000 kg/m³, or equivalently 1 g/cm³ and 1 g/mL. This is why g/cm³ and g/mL are equal — 1 cm³ of water weighs 1 gram.
What is the difference between g/cm³ and g/mL?: They are exactly equal. One millilitre (mL) is defined as one cubic centimetre (cm³), so g/cm³ and g/mL represent the same density. Both equal 1000 kg/m³.
How do I convert lb/ft³ to kg/m³?: Multiply lb/ft³ by 16.0185. For example, 62.4 lb/ft³ × 16.0185 = 999.6 kg/m³, approximately the density of water.
What does a density greater than 1 g/cm³ mean?: A substance with density greater than 1 g/cm³ will sink in pure water. Most metals, rocks, and many plastics are denser than water. Ice is less dense than liquid water (0.917 g/cm³), which is why it floats.
What is the density of air in kg/m³?: Dry air at sea level and 15°C has a density of about 1.225 kg/m³ — roughly 800 times less dense than water. This is why objects float in water more easily than in air.

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