Mass per volume density.
Slugs per Cubic foot to Long tons per Cubic yard Converter — slug/ft3 to long ton/yd3
Convert Slug per Cubic foot (slug/ft3) to Long ton per Cubic yard (long ton/yd3) using the exact conversion factor (1 slug per cubic foot = 0.3878121924 long ton per cubic yard). See the formula, worked examples, and conversion table.
Slugs per Cubic foot to Long tons per Cubic yard converter
Converter
Density Converter
Convert thousands of mass-per-volume density combinations for science, engineering, agriculture, and fluids.
Context values
Some unit families need one extra value for a physically accurate result.
Mass per volume density.
Result = input x 515.3788184 / 1328.939184.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Slugs per Cubic foot to Long tons per Cubic yard
Slug per Cubic foot and Long ton per Cubic yard both measure density — mass per unit volume — a property used to identify materials, check manufacturing quality, and predict whether something floats or sinks. As a fixed reference point, water has a density of exactly 1000 kg/m³ (1 g/cm³, 1 g/mL) at its temperature of maximum density, which is why many density figures in science and engineering are quoted relative to water. Both are mass per volume density units.
Formula
long tons per cubic yard = slugs per cubic foot × 0.387812192421
This factor comes from each unit's defined relationship to the category's base unit: 1 slug per cubic foot equals 515.378818393 base units, and 1 long ton per cubic yard equals 1328.93918362 base units, so dividing one by the other gives the direct slug per cubic foot-to-long ton per cubic yard factor of 0.387812192421.
Simple example
1 slug/ft3 × 0.3878121924 = 0.3878121924 long ton/yd3
1 slug per cubic foot = 0.3878121924 long tons per cubic yard.
Real-world example
1,000 slug/ft3 × 0.3878121924 = 387.8121924 long ton/yd3
1,000 slugs per cubic foot = 387.8121924 long tons per cubic yard.
Conversion table
| Slug per Cubic foot (slug/ft3) | Long ton per Cubic yard (long ton/yd3) |
|---|---|
| 0.1 slug/ft3 | 0.0387812192 long ton/yd3 |
| 1 slug/ft3 | 0.3878121924 long ton/yd3 |
| 10 slug/ft3 | 3.878121924 long ton/yd3 |
| 100 slug/ft3 | 38.78121924 long ton/yd3 |
| 1,000 slug/ft3 | 387.8121924 long ton/yd3 |
| 10,000 slug/ft3 | 3,878.121924 long ton/yd3 |
Reverse conversion: Long ton per Cubic yard to Slug per Cubic foot
0.3878121924 long ton/yd3 × 2.578567718 = 0.9999999999 slug/ft3
0.3878121924 long tons per cubic yard = 0.9999999999 slugs per cubic foot.
slugs per cubic foot = long tons per cubic yard × 2.57856771794
For a page dedicated to this direction, see Long ton per Cubic yard to Slug per Cubic foot.
Understanding the Slug per Cubic foot (slug/ft3)
Mass per volume density.
Understanding the Long ton per Cubic yard (long ton/yd3)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many long tons per cubic yard are in 1 slug per cubic foot?
1 slug per cubic foot equals 0.3878121924 long tons per cubic yard, using the exact defined conversion factor rather than an estimate.
How do I convert slug per cubic foot to long ton per cubic yard?
Multiply the slug per cubic foot value by 0.3878121924. The converter above does this instantly to whatever precision you set.
How do I convert long ton per cubic yard back to slug per cubic foot?
Use the reverse factor: 1 long ton per cubic yard equals 2.578567718 slugs per cubic foot. You can also use the swap control in the converter above to flip the direction instantly.
What is a slug per cubic foot?
Slug per Cubic foot (slug/ft3) is a unit of density.
What is a long ton per cubic yard?
Long ton per Cubic yard (long ton/yd3) is a unit of density.
Is the slug per cubic foot to long ton per cubic yard conversion exact?
Yes. Both slug per cubic foot and long ton per cubic yard are defined by fixed standards rather than physical artifacts, so the factor of 0.3878121924 used above is exact to as many digits as you choose to display.
What's the difference between density and mass concentration?
Density is the mass of a pure substance or material per unit volume. Mass concentration is the mass of one component — like a dissolved solute — within a mixture's total volume. The two use the same kind of units but describe different physical situations.