Construction, Solar & Engineering Estimators
Contractor-grade material volume and cost estimators: concrete slabs & cylindrical footings, epoxy floor coating kits, off-grid solar battery banks, and HVAC BTU sizing.
Concrete Slab & Footing Volume, Bags & Ready-Mix Cost Calculator
Calculate exact concrete volume in cubic yards and cubic meters (m³), 80lb / 25kg pre-mix bag counts, and ready-mix truck delivery costs with adjustable spillage waste factor.
Epoxy Floor Coating Resin Volume (Gallons / Liters) & Cost Calculator
Calculate exact 100%-solids epoxy resin liters/gallons required for primer, base coat, metallic/flake layer, and polyurethane topcoat based on floor area and mil/mm thickness.
Solar Panel Array, LiFePO4 Battery Bank & ROI Payback Calculator
Size your solar PV kilowatt (kWp) array and LiFePO4 battery storage (kWh) from daily consumption, peak sun hours, and autonomy needs—plus calculate utility bill payback.
HVAC Heat Pump & Air Conditioner BTU, Tonnage & kW Sizing Calculator
Calculate exact thermal cooling/heating load in BTU/hr, HVAC refrigeration tons, and kilowatts (kW) factoring in floor area, ceiling height, insulation quality, and solar exposure.