t⋅m2\text{t}{\cdot}\text{m}^{2}

tonne square meter

Moment of inertiaexact by definition

The tonne square metre is exactly 1000 kg·m². Flywheels, turbine rotors and ship propulsion trains are quoted in t·m², where the GD² of older machinery literature also lives.

Watch out: Older machine literature quotes GD², the "flywheel effect", which is four times the moment of inertia because it uses the diameter rather than the radius of gyration. A GD² figure divided by four gives the moment of inertia, and machines have been mis-sized by people who did not know to do it.

1 t⋅m2\text{t}{\cdot}\text{m}^{2} 1,000 kg⋅m2\text{kg}{\cdot}\text{m}^{2}

One tonne square meter in every moment of inertia unit

10,000,000,000gram square centimeter (g·cm²)
1,000,000,000kilogram square millimeter (kg·mm²)
54,674,800ounce square inch (oz·in²)
10,000,000kilogram square centimeter (kg·cm²)
3,417,170pound square inch (lb·in²)
1,000,000gram square meter (g·m²)
23,730.4pound square foot (lb·ft²)
8,850.75pound-force inch second squared (lbf·in·s²)
1,000kilogram square meter (kg·m²)
737.562slug square foot (slug·ft²)
737.562pound-force foot second squared (lbf·ft·s²)
1tonne square meter (t·m²)this unit