Use this free calculator to estimate slab concrete and a user-entered engineer-approved steel allowance. Enter your measurements and keep the material and wastage settings visible.
Enter your details
Every input includes a simple explanation.
Private: the calculation runs in your browser. Your inputs are not sent to GharGanit.
Real site dimensions and workmanship affect the quantity.
Transport, cutting, pattern and breakage affect how much extra material to order.
This is an early quantity estimate. Site conditions, drawings, product details and workmanship can change the final requirement.
The slab result estimates concrete geometry; steel appears only when an engineer-approved allowance is deliberately entered.
Final slab thickness, grade, reinforcement diameter, spacing, laps, cover and supports require structural drawings.
A generic kilograms-per-square-foot shortcut cannot determine safe reinforcement and must never invent the steel design.
Use this calculator only for an early quantity estimate. A qualified civil or structural engineer must decide the final structure, reinforcement and safety details.
Concrete follows entered ratio; steel = slab area × user-entered approved allowance
Final slab thickness, grade, reinforcement diameter, spacing, laps, cover and supports require structural drawings.
A generic kilograms-per-square-foot shortcut cannot determine safe reinforcement and must never invent the steel design.
This is an early quantity estimate. Site conditions, drawings, product details and workmanship can change the final requirement.