Passive House
Calculators
Interactive tools based on Passive House Institute formulas. Use these for education and rough estimates — final certification requires PHPP modeling.
Key Highlights
What matters most for this topic
- Expert guidance on calculators
- Curated for sustainability and performance
- Updated with the latest products and research
- Research-backed education
Why It Matters
Core benefits and considerations
Research-Backed
Content based on building science and Passive House Institute standards
Practical Guidance
Clear explanations homeowners and renovators can act on
Curated Products
Recommended materials and systems mapped to each topic
Free Tools
Calculators, FAQs, and AI audits to support your planning
Passive House Calculators
Educational estimates — confirm with PHPP for certification
Heat Loss Estimator
Simplified peak transmission: P = A × U × ΔT
Insulation R-Value
R = thickness × R-per-inch (simplified, excludes films)
ACH50 (n50) Calculator
From blower door test results at 50 Pascals
Energy Savings vs Passive House
Compare current heating intensity to Passive House target
Explore More
More in Education Hub
Explore Passive House guides
Use our free calculators and FAQ to plan your energy-efficient home.
Try Calculators