Inputs
Wall geometry
Openings
| # | Width (m) | Height (m) | Action |
|---|
Brick & joints
Mortar mix & materials
:
Results
Bricks required (no waste)
–
Bricks required (with waste & bond)
–
Courses × bricks per course
–
Estimated brick weight
–
Mortar wet volume
–
Cement volume → mass → bags
–
Sand volume → mass
–
Example presets (edit then press Compute)
| Preset | Brick L×H×T | Joints H×B | Approx bricks/m² | |
|---|---|---|---|---|
| Common modular | 190×65×90 mm | 10×10 mm | — | |
| Utility size | 230×75×110 mm | 10×10 mm | — | |
| Thick wall | 215×65×102.5 mm | 10×10 mm | — |
Formulas used
Module length Lm = Lb + Jointhead
Module height Hm = Hb + Jointbed
Gross area Agross = Wall length × Wall height
Openings area Aopen = Σ(width × height)
Net area Anet = Agross − Aopen
Bricks (no waste) N0 = Anet ÷ (Lm × Hm)
Bricks final N = N0 × (1 + Waste) × (1 + BondExtra)
Wall volume Vwall = Anet × Thickness
Brick volume Vb = Lb × Hb × Tb × SolidFraction
Mortar wet volume Vm = max(Vwall − N × Vb, 0)
Dry volume Vd = Vm × DryWetFactor
Cement vol = Vd × (C / (C + S)); Sand vol = Vd × (S / (C + S))
Cement mass = Cement vol × ρcement → Bags = mass ÷ BagSize
Sand mass = Sand vol × ρsand
How to use
- Choose your unit system.
- Enter wall length, height, and thickness. Add any openings.
- Set brick dimensions and typical joint thicknesses.
- Pick a bond pattern and waste allowance.
- Enter mortar mix, densities, and bag size.
- Click Compute to update counts and materials.
- Use Download CSV or Download PDF for records.
FAQs
Yes. Brick counts use modular dimensions including head and bed joints.
Yes. Enter values in meters/millimeters or feet/inches as labeled.
Mortar volume equals wall volume minus brick volume. Mix ratio splits dry volume into cement and sand.
Some bonds add extra cuts and waste. A small extra allowance is applied.
Hollow or cored bricks displace less mortar. Solid fraction adjusts brick volume.
Field conditions vary. Always verify against project specs and supplier advice.
Yes. Add as many rows as you need in the Openings table.
Defaults use ~1440 kg/m³ for cement and ~1600 kg/m³ for sand. You may change them.
Enter unit weight per brick to get the total brick weight estimate.
Use the PDF or CSV buttons for tidy, shareable records.
Quick tips
- Bed and head joints typically range 8–12 mm.
- Higher waste for complex bonds or heavy cutting around openings.
- Use project specs for official mix proportions and materials.
- Thickness should reflect actual wythe count or design requirement.
Notes
This tool is an aid. Verify results with drawings, standards, and supplier data.