Converters & Lookups Calculators

Plans, products and codes mix units constantly: feet and meters, square feet and square yards, cubic feet and cubic yards, fractions and decimals. These converters use exact definitions, and the size charts list standard lumber and rebar sizes.

Which tool answers which question

• Acres to Square Feet Converter: Convert between acres and square feet for lot size, land and yard planning.
• Centimeters to Inches Converter: Convert length between centimeters and inches, both directions on one page.
• Cubic Feet to Cubic Yards Converter: Convert between cubic feet and cubic yards for concrete, gravel, mulch and soil orders.
• Cubic Inches to Cubic Feet Converter: Convert small volumes -- board footage, container capacity -- between cubic inches and cubic feet.
• Cubic Yards to Tons Converter: Convert cubic yards to tons (or back) for gravel, sand, topsoil, mulch and concrete.
• Feet to Centimeters Converter: Convert length between feet and centimeters, both directions on one page.
• Feet to Meters Converter: Convert length between feet and meters, both directions on one page.
• Feet to Yards Converter: Convert length between feet and yards, both directions on one page.
• Fraction to Decimal Inches Converter: Convert a fraction of an inch (like 5/8") to its decimal equivalent, or use the 16ths reference table below.
• Lumber Size Chart: Nominal vs. Actual: What a 2x4, 2x6, 4x4 and other common lumber sizes actually measure once milled.
• Millimeters to Inches Converter: Convert length between millimeters and inches, both directions on one page.
• Rebar Size Chart: Bar number to diameter, cross-sectional area, and weight per foot for standard US rebar.
• Square Feet to Square Meters Converter: Convert room, floor or lot area between square feet and square meters.
• Square Feet to Square Yards Converter: Convert flooring or carpet area between square feet and square yards.
• Square Inches to Square Feet Converter: Convert small material areas -- tile, panel, or sample sizes -- between square inches and square feet.

Exact factors

An inch is exactly 2.54 centimeters, a foot is exactly 0.3048 meters and an acre is exactly 43,560 square feet. Converting cubic yards to tons is different, because it depends on the density of the material, so the tool states which density it uses and your supplier's figure may differ.

Common mistakes

• Rounding early. Round only the final answer.
• Using nominal lumber sizes. Actual sizes are smaller.
• Treating tons and yards as equal. Density decides the conversion.