HVAC & AC Calculators
23 free professional-grade tools to help you size, compare, and calculate costs for your air conditioning needs.
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Showing 23 calculators
AC BTU Calculator
Calculate the exact BTU and recommended AC tonnage for any room. Enter room dimensions, occupancy, windows & insulation.
AC Tonnage Calculator
Convert BTU to tons and get AC size recommendations based on room size.
AC Room Size Calculator
Find the ideal AC capacity for common room sizes with pre-set configurations.
Electricity Consumption Calculator
Estimate your AC running costs per day, month, and year based on usage patterns.
Cooling Load Calculator
Manual J style cooling load estimate with simplified inputs for residential use.
Duct Size & CFM Calculator
Calculate duct dimensions and airflow requirements for your HVAC system.
Inverter vs Non-Inverter
Compare savings between inverter and non-inverter ACs with payback period analysis.
Solar AC Feasibility
Calculate solar panel requirements to run your AC using renewable energy.
Monthly Bill Calculator
Calculate your expected monthly electricity bill from AC usage.
Star Rating Savings
Compare electricity costs between different AC star ratings.
Heat Load Calculator
Calculate total heat load for commercial spaces with comprehensive inputs.
Manual J Calculator
ACCA Manual J residential load calculation for accurate HVAC sizing.
Daily Running Cost
Calculate daily AC operating costs based on usage hours and tariff.
Yearly Bill Calculator
Estimate your annual AC electricity expenses with seasonal adjustments.
BTU to kWh Converter
Convert BTU ratings to kilowatt-hours for energy calculations.
Room Heat Gain Calculator
Calculate heat gain from windows, walls, appliances, and occupants.
High Ceiling AC Size
AC sizing calculator for rooms with high ceilings (10ft and above).
Kitchen AC Size
Calculate AC size for kitchens accounting for cooking heat sources.
Server Room AC
AC sizing for server rooms and data centers with equipment heat load.
HVAC CFM Calculator
Calculate required airflow in cubic feet per minute for your space.
Air Changes Per Hour
Calculate ACH requirements for different space types and uses.
Inverter Capacity Calculator
Size your inverter for running AC during power cuts and outages.
Battery Backup Calculator
Calculate battery capacity needed for AC backup power supply.