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My Watershed

How do I convert units of measure?

Dangerous Waste is reported on the Annual Report forms in tons, pounds, kilograms, or gallons. Ecology's guidance for calculating Quantity Exclusion Limits (QELs) and Generator Status uses pound measurements.

Use the conversion factors and examples in the following tables if you need to convert your waste amounts from one unit of measure to another.

How to Get Pounds from Tons or Cubic Yards

Unit of Measure You Have

Multiply the Quantity by the Conversion Factor

Example

Short Tons

Multiply by 2,000

(1 ton = 2000 lbs)

3 short tons, multiplied by 2,000 = 6,000 pounds

Metric Tons

Multiply by 2,200

(1 metric ton = 2200 lbs)

5 metric tons, multiplied by 2,200 = 11,000 pounds

Cubic yards

If density is measured in pounds per cubic yard: multiply by the density

3 cubic yards of contaminated soil, multiplied by 2,700 (density of soil) = 8,100 pounds

Cubic yards

If you do not know the density, use the following as a guideline:

DENSITY

MATERIAL             (pounds per cubic yard)

Clay                                   2,100

Slag (blast furnace)            2,200

Earth/Soil                          2,700

Limestone                          2,700

Sand, dry/loose                 2,700

Sand, wet/packed             3,200

 

How to Get Pounds from Kilograms

Unit of Measure You Have

Multiply the Quantity by the Conversion Factor

Example

Micrograms

Multiply by 0.0000000022

1 microgram = 0.0000000022 or (2.2e-9) pound

300 micrograms multiplied by 0.0000000022 = 0.00000066 pounds.

Note: micrograms are used in laboratory measurements.

Milligrams

Multiply by 0.0000022

1 milligram = 0.0000022 pound

500 milligrams multiplied by 0.0000022 = 0.0011023 pounds

Note: milligrams are used in laboratory measurements.

Centigrams

Multiply by 0.000022

1 centigram = 0.000022 pound

80 centigrams multiplied by 0.000022 = 0.0017637 pounds

Kilograms

Multiply by 2.205

(1 kilogram = 2.205 lbs)

5 kilograms multiplied by 2.205 = 11.025 pounds

Grams

Multiply by 0.0022046

1 gram = 0.0022046 pound

700 grams multiplied by 0.0022046 = 1.5432358 pounds

 

How to Get Pounds from Gallons

Unit of Measure You Have

Multiply the Quantity by the Conversion Factor

Example

Gallons

If you do not know the density: multiply by 8.34, the density of water

(1 gal water =8.34 lbs)

50 gallons of wastewater, multiplied by 8.34 = 417 pounds

Gallons

If density is measured in lbs per gallon (lbs/gal): multiply by the density

50 gallons of wastewater with a density of 7.9 lbs/gal is multiplied by 7.9. = 395 pounds

Gallons

If density is measured by specific gravity: multiply by 8.34 Then multiply this product by the specific gravity

50 gallons of wastewater multiplied by 8.34 = 417 pounds

417 pounds multiplied by a specific gravity of 1.2 = 500.4 pounds

 

How to Get Pounds from Liters

Unit of Measure You Have

Multiply the Quantity by the Conversion Factor

Example

Liters

If you do not know the density, assume the waste has the density of water: multiply by 2.19.

(1 liter water = 2.19 pounds)

500 liters of wastewater, multiplied by 2.19 = 1,095 pounds

Liters

If density is measured in lbs/liter: multiply by the density.

500 liters of wastewater, with a density of 2.1 lbs/liter, multiplied by 2.1 = 1,050 pounds

Liters

If density is measured by specific gravity: multiply by 2.19. Then multiply this product by the specific gravity.

500 gallons of wastewater multiplied by 2.19 = 1,095 pounds

1,095 pounds multiplied by a specific gravity of 1.2 = 1,314 pounds