Dead Load Calculator (Floor Build-Up)
Slab + finishes + services dead load in kN/m² from layer thicknesses.
A typical Indian residential floor: 150 slab (3.75) + 65 finish (1.56) + plaster (0.24) + 1.5 partitions ≈ 7 kN/m² before anyone moves in.
Formula
Dead Load Calculator (Floor Build-Up) is a free dead load calculation for structural engineers, fabricators and site engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Dead Load Calculator (Floor Build-Up)
Slab + finishes + services dead load in kN/m² from layer thicknesses. The calculation implements DL = t_slab×25 + t_finish×24 + t_plaster×20.4 + allowances (IS 875 Part 1 — unit weights). A typical Indian residential floor: 150 slab (3.75) + 65 finish (1.56) + plaster (0.24) + 1.5 partitions ≈ 7 kN/m² before anyone moves in.
How to use Dead Load Calculator (Floor Build-Up)
- 1Enter RC slab thickness in mm.
- 2Enter Floor finish (screed+tile) in mm.
- 3Enter Plaster/ceiling in mm.
- 4Enter Services + partitions allowance in kN/m².
- 5Read Total dead load instantly — no submit button needed.
- 6Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Dead Load Calculator (Floor Build-Up)?
- ✓Implements the standard formula — DL = t_slab×25 + t_finish×24 + t_plaster×20.4 + allowances
- ✓Reference cited on-page: IS 875 Part 1 — unit weights
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Dead Load Calculator (Floor Build-Up) use?+
It computes DL = t_slab×25 + t_finish×24 + t_plaster×20.4 + allowances, per IS 875 Part 1 — unit weights. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
A typical Indian residential floor: 150 slab (3.75) + 65 finish (1.56) + plaster (0.24) + 1.5 partitions ≈ 7 kN/m² before anyone moves in.
Can I use this for real structural design?+
It implements the exact textbook/code formula cited below the result and is ideal for sizing, checking and learning. Final designs should be verified by a qualified engineer against the full code with all load cases.
Is the Dead Load Calculator (Floor Build-Up) free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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