MEASURE ONCE. PLAN YOUR PURCHASE.

Rebar Quantity calculator.

Count bars and total length from a grid you specify.

CONCRETE

Your inputs

Use measurements from your plan and properties from your chosen product. Any prefilled values are illustrative.

Length

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Width

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Specified maximum grid spacing

Where to get this value

Copy this specification from your supplied design or product documentation. This tool does not select spacing, fixing patterns or structural requirements.

Additional lap / trim length

Where to get this value

Measure this dimension in your plan or on site and use the displayed unit. For irregular shapes, divide the geometry into the supported sections.

Waste allowance

Shortcuts only; choose your own allowance above.

Where to get this value

Enter your own allowance. Presets are input shortcuts, not a construction recommendation.

YOUR ESTIMATE

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A clear estimate starts here.

Enter your dimensions and product details to see the quantity and purchase breakdown.

KEEP YOUR PROJECT TOGETHER

Plan the full project.

Reuse your dimensions, add the other materials and build a purchase list.

Open Concrete slab project

Formula and assumptions

BEHIND THE NUMBERS

How this calculation works.

Counts include bars at both supplied grid extents. Additional lap and trim length is entered separately. This does not select spacing, diameter or reinforcement design.

Total length = bars along L × L + bars along W × WCalculated with normalised units