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Both calculators run independently — change the inputs on either side to compare results.

Concrete Mix Design Calculator

Estimates the total cement mass required for a concrete pour based on volume and target strength. Use it when specifying mix proportions for slabs, columns, or foundations to meet structural and durability requirements.

Target Compressive Strength (MPa)

Concrete Volume Needed (m³)

Fill in the required fields to see your result.

Engineering

HVAC Heat Load Calculator

Estimates the heating or cooling load for a room or building in BTU/hr based on floor area, ceiling height, insulation quality, temperature difference, and window area. Use it to size furnaces, air conditioners, and heat pumps.

Floor Area (sq ft)

Ceiling Height (ft)

Insulation Level

Temperature Difference (°F)

Window Area (sq ft)

Fill in the required fields to see your result.

Key differences

	Concrete Mix Design Calculator	HVAC Heat Load Calculator
Category	Engineering	Engineering
Inputs required	2	5
Result	Cement Required (kg)	Total Heat Load (BTU/hr)
What it does	Estimates the total cement mass required for a concrete pour based on volume and target strength. Use it when specifying mix proportions for slabs, columns, or foundations to meet structural and durability requirements.	Estimates the heating or cooling load for a room or building in BTU/hr based on floor area, ceiling height, insulation quality, temperature difference, and window area. Use it to size furnaces, air conditioners, and heat pumps.