Convert electric resistivity between ohm-metres and related units, describing a material’s inherent resistance regardless of shape.
Currently converting ohm meter to ohm centimeter. Swap units to reverse.
How to Convert
1 Ω·m = 100 Ω·cm
1 Ω·cm = 0.01 Ω·m
Quick Conversion Table
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Resistivity Is a Material Property, Resistance Depends on Shape Too
Electric resistivity measures a material’s inherent opposition to current flow as a pure property of the material itself, independent of the specific object’s shape or size, unlike ordinary electric resistance, which does depend on an object’s dimensions, since a longer, thinner wire made from a given material has considerably more resistance than a short, thick piece of the exact same material, even though both are built from a substance with identical resistivity. This distinction is exactly why resistivity, expressed in ohm-metres, is the figure genuinely used to compare how well different materials conduct electricity, since copper, silver, and aluminium can be meaningfully ranked against each other by their resistivity values in a way that comparing the resistance of arbitrarily different wire samples of those materials simply couldn’t achieve fairly. Resistance itself is then calculated by combining a material’s resistivity together with the specific object’s length and cross-sectional area, which is exactly why choosing a thicker gauge wire reduces electrical resistance for a fixed material and length, not because the material’s underlying resistivity has changed at all, but because more cross-sectional area gives current more available pathway through which to flow.