AC Size Calculator

WAZIPOINT.COM — Engineering Field Tools

Air Conditioner Size Calculator

Estimate the right BTU/hr cooling capacity and AC tonnage for a room, corrected for ceiling height, sun exposure, occupancy, and Bangladesh's hot-humid load — built on standard HVAC rule-of-thumb sizing.

REF: HVAC-SZ-01
METHOD: BTU/ft² baseline
REGION DEFAULT: Hot–Humid

Room & Load Inputs

Room area sq ft

Ceiling height standard = 8–9 ft

Occupants typical use, not peak

Windows glazed openings in the room

Sun / window exposure

Shaded

Moderate

Direct sun

West-facing / peak sun

Room type

Bedroom

Living room

Kitchen

Office / equipment room

Heat-generating appliances / electronics TV, PC, server, oven, etc.

Top floor / under exposed roof

No

Yes

Climate zone

Hot–humid (Bangladesh default)

Moderate

Load Gauge

—

BTU / HR REQUIRED

— TON

Enter room details and calculate to see your recommended AC size.

Standard sizes: 0.75T · 1.0T · 1.5T · 2.0T · 2.5T · 3.0T

Load Breakdown

CALCULATION LEDGER

Factor	Basis	BTU/hr
Run the calculation to see your load breakdown.

Inverter tip — In Bangladesh's climate, an inverter AC sized to this estimate (rather than oversized "just in case") runs more efficiently at partial load, cycles less, and typically cuts electricity use by 20–30% over a fixed-speed unit of the same nominal tonnage.

© WAZIPOINT.COM — Engineering & Field Reference Tools Sizing based on standard 20 BTU/ft² baseline with correction factors · Verify with a manufacturer heat-load (Manual J style) calculation for critical installations.

WAZIPOINT.COM · Engineering Field Tools

Air Conditioner Sizing Report

Generated:
Ref: HVAC-SZ-01

—

Recommended AC size

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Calculated BTU/hr load

Input	Value

Load factor	Basis	BTU/hr

Method: standard 20 BTU/ft² rule-of-thumb baseline, adjusted for ceiling height, occupancy, glazing, sun exposure, room type, appliance load, floor exposure, and climate zone. This is a planning estimate — for final equipment selection on commercial or critical installations, verify with a full Manual J–style heat-load calculation. Generated with the WAZIPOINT.COM AC Size Calculator.