🪟 Shuttering / Formwork Calculator PRO
Shuttering area, plywood sheets, release oil, labour & material cost for slab, beam, column & staircase.
Formwork Panel — updates as you type
Member faces with walers. Plywood follows the contact area divided by sheet size.
1 Member Type
2 Member Dimensions
3 Material & Labour Rates
Results
Shuttering Area
Materials
Cost Breakdown
Professional Shuttering Guide
Show formulas, plywood specs & tips ▼
Area Formulas
Slab:Area = L × W (contact area with concrete bottom face)
Beam:Area = 2 × (W + D) × L (bottom + 2 sides)
Column:Area = 2 × (W + D) × L (all 4 faces, L = height)
Staircase:Area = L × W + 2 × (W + D) × L (slab bottom + waist + sides)
Plywood Specifications
| Size | Area | Reuses |
|---|---|---|
| 4 × 8 ft | 32 sq ft | 8-12 |
| 4 × 10 ft | 40 sq ft | 8-12 |
Release Agent Guidelines
- Apply 1 coat before each pour for clean stripping
- Coverage: 40-60 sq ft/L depending on plywood condition
- Used oil is cheaper but may stain concrete — use proper form oil
- Budget 10-15% extra for waste and re-coating
Common Mistakes
- Not allowing for plywood reuses — proper oil extends life significantly
- Ignoring bracing requirements — inadequate support causes blowouts
- Using wrong plywood grade — BWR/BS grade for wet concrete contact
- Skipping edge sealing — raw plywood edges absorb water and swell
- Not factoring waste — always add 10-15% for cuts and damaged sheets
Drag to rotate — Scroll to zoom
Calculadoras Relacionadas
Frequently used together on the same project.
Client & Quote (prints on PDF & Excel)
Adjustments (applies to exports)
Contingency is added as a separate line on the exported cost summary. Waste % is printed as an advisory reminder.
Project notes (prints on PDF & Excel)
Result compare (A/B)
| Item | Pinned | Current | Change |
|---|---|---|---|
Saved rates auto-apply from your Price Library. Advanced details stay in your browser — nothing is uploaded except inside your own PDF/Excel exports.
📖 Cómo Usar la Calculadora
Mida el área de superficie.
Seleccione el tipo de encofrado.
Ingrese el factor de reutilización.
Ingrese el costo por unidad.
Haga clic en Calcular.
Revise el desglose.
📐 Fórmulas de Materiales
⚠️ Errores Comunes
Subestimar láminas.
No considerar desperdicio de corte.
Espaciado incorrecto.
Ignorar peso del hormigón.
No considerar tiempo de desencofrado.
💡 Consejos Profesionales
Use madera contrachapada filmada de alta calidad.
Asegure soporte adecuado.
Calcule presión del hormigón.
Planifique la secuencia de desencofrado.
Aplique aceite de desencofrado uniformemente.
Inspeccione todos los componentes.
Almacene la madera correctamente.
❓ Preguntas Frecuentes
Depende de la calidad. Estándar 5 a 8 veces. Alta calidad 15 a 25 veces.
Común: 12, 15 y 18 mm. Para paredes 15 a 18 mm.
Divida el área del losa por el espaciado.
Depende del diseño. Típicamente 2 a 4 metros por hora.
Depende de la resistencia. Paredes 12 a 24 horas. Losas 7 a 14 días.
🏗️ Aplicaciones Reales
Use nuestra calculadora para estimar materiales y costos de encofrado.
✅Method, Sources & Review
Maintained by theBuildingCalc methods desk· Last reviewedSeptember 23, 2026. This calculator implements the standards and references below; every figure can be rechecked against the formulas and worked example on this page.
Results are estimates, not engineering advice. Verify against local codes and licensed professionals for structural, electrical, and gas work. See ourTerms. Spotted an error? Report it— corrections ship with the next review.