03 // Bidirectional STEM Calculators // EVERYDAYV = L × W × T

Concrete Slab Volume & Dimensions Calculator

Rectangular slab-on-grade concrete volume V equals the product of formwork length L, width W, and uniform slab depth T: V = L × W × T.

V = L × W × T

Pick which value you want to calculate (or type into any field):Solving for: V — Concrete Volume Required

Concrete Volume RequiredCalculated

Total pour volume (switch inline unit to Cubic Yards yd³ or ft³)

0.0110,000.00

Slab Length

Length of formwork in meters (switch inline unit to ft)

0.11,000.00

Slab Width

Width of formwork in meters (switch inline unit to ft)

0.11,000.00

Slab Thickness / Depth

Pour depth in meters (switch inline unit to cm or in)

0.025

Calculated Result · Concrete Volume Required (V)

6m³

Converted units:

Step-by-Step Calculation

01Canonical Law: V = L × W × T

02Given Inputs (Base Units): L = 10 m, W = 6 m, T = 0.1 m

03Solve for V (Concrete Volume Required): V = 6 m³

Rectangular slab-on-grade concrete volume V equals the product of formwork length L, width W, and uniform slab depth T: V = L × W × T.

Normal-Weight Concrete Density2,400 kg/m³ (4,050 lb/yd³)

6 m³ pour weighs 14.4 metric tons

Residential Patio / Sidewalk Depth4 in (100 mm / 0.10 m)

Standard light-load slab thickness

Garage / Heavy Driveway Depth5 – 6 in (125 – 150 mm)

Reinforced with rebar grid or welded wire mesh

Concrete Volume Required (V) · Slab Length (L)

Compare across:

Concrete Slab Volume & Dimensions Calculator — Slab Length → Concrete Volume Required
#	Slab Length (m)	Concrete Volume Required (m³)	Δ %
01	0.1 m	0.06 m³	-99.00%
02	10 mCurrent	6 m³	0.00%
03	15.6143 m	9.3686 m³	+56.14%
04	23.3715 m	14.0229 m³	+133.72%
05	31.1287 m	18.6772 m³	+211.29%
06	38.8859 m	23.3315 m³	+288.86%
07	46.643 m	27.9858 m³	+366.43%
08	54.4002 m	32.6401 m³	+444.00%
09	62.1574 m	37.2944 m³	+521.57%
10	69.9145 m	41.9487 m³	+599.15%
11	77.6717 m	46.603 m³	+676.72%
12	85.4289 m	51.2573 m³	+754.29%
13	93.1861 m	55.9116 m³	+831.86%
14	100.9432 m	60.5659 m³	+909.43%
15	108.7004 m	65.2202 m³	+987.00%
16	116.4576 m	69.8745 m³	+1064.58%
17	124.2147 m	74.5288 m³	+1142.15%
18	131.9719 m	79.1831 m³	+1219.72%
19	139.7291 m	83.8374 m³	+1297.29%
20	147.4863 m	88.4918 m³	+1374.86%

Was this tool helpful?

How do I order concrete in US Cubic Yards (yd³) using Feet and Inches?+

Switch L and W inline units to Feet (ft), T to Inches (in), and V to Cubic Yards (yd³). The engine converts 27 ft³ = 1 yd³ automatically!

How many 80-lb (36.3 kg) premix bags equal 1 cubic yard?+

One cubic yard (27 ft³) requires forty-five 80-lb bags (0.60 ft³ yield per 80-lb bag) or sixty 60-lb bags.

How much extra concrete should I order for subgrade unevenness?+

Contractors add 5% to 10% overage above theoretical geometric volume to account for subgrade settlement and pump line waste.