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Unit converters · Common

Moment of inertia converter

Convert rotational moment of inertia between metric and imperial engineering units.

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How it works

Two steps, no account

1

Pick your units

Mass-based (kg⋅m²) or force-based (kgf⋅m⋅s², lbf⋅in⋅s²) engineering conventions.

2

Enter a value

The result updates instantly as you type, or as soon as you change either unit.

FAQ

Common questions

Is my data sent anywhere?
No. The conversion runs entirely in your browser — nothing is transmitted, logged, or stored.
What is moment of inertia used for?
It measures an object's resistance to changes in rotational speed — the rotational analogue of mass in linear motion. Engineers use it when sizing motors, flywheels, and any rotating machinery.
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Moment of Inertia Converter

Moment of inertia (rotational inertia) determines how difficult it is to change an object's rotation speed. This tool converts values between various metric and imperial units.

How to Use

1. Enter Value

Type the numerical value you wish to convert.

2. Select Units

  • From: Choose the starting unit (e.g., kg·m²).
  • To: Choose the target unit (e.g., lb·ft²).

3. Result

The conversion is calculated instantly.

Supported Units

  • Metric:
    • kilogram square meter (kg·m²) - The SI unit.
    • kilogram square centimeter (kg·cm²)
    • kilogram square millimeter (kg·mm²)
    • gram square centimeter (g·cm²)
  • Imperial:
    • pound square foot (lb·ft²)
    • pound square inch (lb·in²)
    • ounce square inch (oz·in²)
    • slug square foot (slug·ft²)

Why Convert These Units?

Different industries use different standards.

  • Physics: Uses standard SI units (kg·m²).
  • Engineering (US): Often uses lb·ft² or slug·ft².
  • Small Machinery: May use smaller units like g·cm² or oz·in².

Technical Accuracy

Our converter handles precise conversion factors.

  • 1 lb·ft² ≈ 0.04214 kg·m²
  • 1 slug·ft² ≈ 1.3558 kg·m²