Quality, Service, Expertise and Integrity in Construction Products Since 1901
Concrete-Related Metric Conversions2018-05-24T02:06:20+00:00

# Concrete-Related Metric Conversions

The metric system, in use by most of the world, is increasingly being used by the construction industry in the United States.

• Concrete Volume: One cubic yard = 0.7645549 cubic meters.
• Compressive Strength: One pound per square inch = 0.006894757 mega pascals (MPa).
• Batch Quantities: One pound per cubic yard = 0.5932764 kilograms (kg) per cubic meter.
• Unit Weight (Density): One pound per cubic foot = 16.018846 kilograms (kg) per cubic meter.
• Admixture Volume: One fluid ounce per 100 pounds = 65.19847 milliliters (ml) per 100 kilograms.
• Water Volume: One gallon per cubic yard = 4.951132 liters per cubic meter.
• Length/Depth: One inch = 25.4 millimeters (mm).
• Mass: One pound = 0.4535924 kilograms (kg).
• Area: One square foot = 0.0929034 square meters.
• Temperature: Degrees Celsius = (Fahrenheit degrees – 32 degrees) / 1.8.

Here are some specific examples to help:

Measurement Type U.S. Value Metric Value
Concrete design strength 3000 psi 21 MPa
Cement content 564 pounds/cubic yard 335 kg/cubic meter
Ready-mix truck capacity 9 cubic yards 7 cubic meters
Slump 3-4 inches 75-100 mm (hard)
Slab thickness 6 inches 150 mm (hard)
Density of concrete 145 pounds/cubic foot 2,323 kg/cubic meter
Bag of cement, weight 94 pounds 40 kg (hard Canadian)
Rebar designation #3 to #18 10-55 mm (hard)
Vapor barrier, thickness 6 mils 150 microns