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`TW = L * W * D *mD`

Enter a value for all fields

The **Weight of a Concrete Slab** calculator estimates the weight of a rectangle (square) concrete slab.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**L**) Length of slab. - (
**W**) Width of slab. - (
**D**) Depth of a slab. - (
**mD**) Mean Density of Concrete (default: 2400 kg/m^{3})

**Weight of a Slab (TW):** The calculator returns the weight of the slab in pounds. However, this can be automatically converted to other mass or weight units (e.g. short tons or metric tons) via the pull-down menu. The calculator also returns the volume (V) of concrete and the surface area (A).

**Note:** This is the weight of a slab with just concrete. The presence of rebar causes additional rebar weight. The **Total Weight of a Slab with Rebar** calculator computes the weight of a slab with rebar.

The weight of a concrete slab can be estimated by computing the volume of the slab and multiplying the volume (V) by the density of the concrete. The volume is simply the area (A = L*W) times the depth (D).

The formula for the weight of a slab used in this calculator is:

TW = L•W•D•mD

where:

- TW = Total Weight of slab
- L = Length of slab
- W = Width of Slab
- D = Depth of Slab
- mD = Mean Density of Concrete (2400 kg / m³)

**Note**: This calculation does NOT include the weight of rebar. To compute the weigh of a slab with rebar, see the Weight of a Slab with Rebar Calculator. The Weight of a Slab with Rebar Calculator computes the weight of rebar in the rectangular slab, and removes the weight of the displaced concrete to provide the best estimate.

- Compute the
**Weight of Any Volume of Concrete**Quick Calc Here - Rebar Weight
- Compute the
**Length of Rebar**needed for a slab. - Compute the
**Weight of Rebar**in a slab. - Compute the
**Surface Area**of a slab. - Compute the
**Surface Area of Concrete Forms**. - Compute the
**Volume of Concrete**in a slab. - Compute the
**Total Weight of a Slab with Rebar** - Spanish Version:
**Calculadora de Barras de Refuerzo**