Compare calculators

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

HVAC BTU Room Sizing Calculator

Size an air conditioner or mini-split to a room. Enter the room length and width, the ceiling height, choose the room's sun exposure, and add the number of regular occupants to estimate the cooling capacity in BTU per hour you need.

Room Length (ft)

Room Width (ft)

Ceiling Height (ft)

Sun Exposure

Regular Occupants (people)

Construction

Window Replacement Cost Calculator

Estimates the total cost of a window replacement project based on the number of windows, window type, and per-window labour cost. Use it to budget before getting contractor quotes.

Number of Windows (windows)

Window Type

Labor Cost per Window ($)

Key differences

	HVAC BTU Room Sizing Calculator	Window Replacement Cost Calculator
Category	Construction	Construction
Inputs required	5	3
Result	Cooling Capacity Needed (BTU/hr)	Total Project Cost ($)
What it does	Size an air conditioner or mini-split to a room. Enter the room length and width, the ceiling height, choose the room's sun exposure, and add the number of regular occupants to estimate the cooling capacity in BTU per hour you need.	Estimates the total cost of a window replacement project based on the number of windows, window type, and per-window labour cost. Use it to budget before getting contractor quotes.