CalcUnderfloor Heating Calculator
Last updated: 2026-08-24
Underfloor Heating Calculator — Underfloor heating pipe length based on area and pipe spacing.
Inputs
Result
Enter values and press Calculate
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How to use it
- Calculate meters of pipe: 80m² × (100 ÷ 15) = 80 × 6.67 = 533.33m
- Apply factor 1.10 per bordes: 533m × 1.10 = 586m of tubo
- Calculate circuitos: 586m ÷ 100m/circuito = 5.86 → 6 circuitos
- Colector necessary: 6 salidas (vías)
Common mistakes
- ⚠️ Exceder length máxima per circuito (loss of carga excesiva)
- ⚠️ Not aislar térmicamente low The tubos (loss hacia abajo)
- ⚠️ Not dejar juntas of dilatación in surfaces > 40m²
Worked example
Calculate pipe length for underfloor heating: 80m2 with 15cm spacing.
To {area_m2}m² with pipe each {separacion_cm}cm need {tuberia_m}m of tubo PEX in {circuitos_ud} circuitos. Colector of {vias_ud} vías requerido.
Input guide
| Field | Typical range |
|---|---|
| area_m2 | area a calefaccionar with floor radiant |
| separacion_cm | Típico: 10-20cm (15cm standard for viviendas) |
| circuitos_max_m | length máxima per circuito: 80-120m according to diameter |