Mass per volume density.
Megagrams per Gallon to Pounds per Cup Converter — Mg/gal to lb/cup
Convert Megagram per Gallon (Mg/gal) to Pound per Cup (lb/cup) using the exact conversion factor (1 megagram per gallon = 137.7889139 pound per cup). See the formula, worked examples, and conversion table.
Megagrams per Gallon to Pounds per Cup 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 264172.0524 / 1917.222837.
Density uses kilograms per cubic meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Megagrams per Gallon to Pounds per Cup
Megagram per Gallon and Pound per Cup 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
pounds per cup = megagrams per gallon × 137.788913866
This factor comes from each unit's defined relationship to the category's base unit: 1 megagram per gallon equals 264172.052358 base units, and 1 pound per cup equals 1917.22283707 base units, so dividing one by the other gives the direct megagram per gallon-to-pound per cup factor of 137.788913866.
Simple example
1 Mg/gal × 137.7889139 = 137.7889139 lb/cup
1 megagram per gallon = 137.7889139 pounds per cup.
Real-world example
1,000 Mg/gal × 137.7889139 = 137,788.9139 lb/cup
1,000 megagrams per gallon = 137,788.9139 pounds per cup.
Conversion table
| Megagram per Gallon (Mg/gal) | Pound per Cup (lb/cup) |
|---|---|
| 0.1 Mg/gal | 13.77889139 lb/cup |
| 1 Mg/gal | 137.7889139 lb/cup |
| 10 Mg/gal | 1,377.889139 lb/cup |
| 100 Mg/gal | 13,778.89139 lb/cup |
| 1,000 Mg/gal | 137,788.9139 lb/cup |
| 10,000 Mg/gal | 1,377,889.139 lb/cup |
Reverse conversion: Pound per Cup to Megagram per Gallon
137.7889139 lb/cup × 0.00725747792 = 1 Mg/gal
137.7889139 pounds per cup = 1 megagrams per gallon.
megagrams per gallon = pounds per cup × 0.00725747792
For a page dedicated to this direction, see Pound per Cup to Megagram per Gallon.
Understanding the Megagram per Gallon (Mg/gal)
Mass per volume density.
Understanding the Pound per Cup (lb/cup)
Mass per volume density.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many pounds per cup are in 1 megagram per gallon?
1 megagram per gallon equals 137.7889139 pounds per cup, using the exact defined conversion factor rather than an estimate.
How do I convert megagram per gallon to pound per cup?
Multiply the megagram per gallon value by 137.7889139. The converter above does this instantly to whatever precision you set.
How do I convert pound per cup back to megagram per gallon?
Use the reverse factor: 1 pound per cup equals 0.0072574779 megagrams per gallon. You can also use the swap control in the converter above to flip the direction instantly.
What is a megagram per gallon?
Megagram per Gallon (Mg/gal) is a unit of density.
What is a pound per cup?
Pound per Cup (lb/cup) is a unit of density.
Is the megagram per gallon to pound per cup conversion exact?
Yes. Both megagram per gallon and pound per cup are defined by fixed standards rather than physical artifacts, so the factor of 137.7889139 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.