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

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.

Engineering

Pipe Flow Rate Calculator

Determine volumetric flow rate through a pipe using the Hazen-Williams equation for water distribution systems. Used by civil and mechanical engineers to size pipes and diagnose pressure loss.

Pipe Diameter (m)

Pipe Length (m)

Head Loss (m)

Hazen-Williams C Factor

Result Units

Fill in the required fields to see your result.

Key differences

	HVAC Heat Load Calculator	Pipe Flow Rate Calculator
Category	Engineering	Engineering
Inputs required	5	5
Result	Total Heat Load (BTU/hr)	Flow Rate (L/s)
What it does	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.	Determine volumetric flow rate through a pipe using the Hazen-Williams equation for water distribution systems. Used by civil and mechanical engineers to size pipes and diagnose pressure loss.