BTU Calculator: AC & HVAC

Get the right AC unit the first time. No more guessing, no more sweating. Calculate BTUs for any room in seconds.

Size your AC or heating unit correctly - no more overpaying or sweating.

Takes room dimensions, ceiling height, insulation, sun exposure, occupants, and kitchen to recommend the right BTU and tonnage.

KEY FEATURES:

• Adjusted BTU Recommendation - Base BTU adjusted for conditions
• Tonnage Rating - Unit size in tons for HVAC shopping
• Adjustment Breakdown - How each factor affects BTU needs
• Imperial & Metric - Feet or meters; BTU or watts
• Multiple Factors - Insulation, sun, occupants, kitchen

Free to download. No sign-up. No paywall. Works offline.

By Blas Apps - simple calculators that do one thing perfectly.