Free cooling calculators & tools
Seven working calculators, formulas printed on every page, no sign-ups. They exist so spec sheets and marketing claims can be checked in seconds — ours included.
Why a review site builds calculators
Because numbers keep marketing honest. Every FreezAir review links back to these tools so any claim — “pennies a day”, “cools 1,300 sq ft”, “whisper-quiet” — can be checked, not just believed. Start with the BTU calculator; it usually reveals which product lane is even yours.
More from this section
BTU calculator: what size air conditioner do you need?
Free BTU calculator for air conditioners: room size, ceiling, occupants, sun and insulation in; BTU, watts and the DOE vs ASHRAE translation out.
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Room size calculator: what area will this unit handle?
Room size calculator in reverse: enter an AC unit’s BTU (DOE) and see the area it truly handles — with an honest personal-zone mode for coolers.
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Energy cost calculator: what cooling really costs to run
Energy cost calculator for air conditioners and coolers: watts, hours and your tariff in; daily, monthly and season cost out, with country presets.
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Electricity consumption calculator (kWh)
Electricity consumption calculator for cooling devices: watts and daily hours in, kWh per day, month and year out, plus typical draws by category.
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Noise comparison tool: what those dB claims sound like
Noise comparison tool for cooling devices: put any two dB sources side by side, see the perceived-loudness gap, and learn how to read dB claims.
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Temperature converter: °C ⇄ °F ⇄ K
Instant temperature converter between Celsius, Fahrenheit and Kelvin, plus the comfort ranges that matter when sizing fans, coolers and AC units.
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Power consumption calculator: watts, volts, amps & runtime
Power consumption calculator for label plates and off-grid plans: convert volts and amps to watts, watts to kWh, and battery Wh into real runtime.
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