Calculate a 3D volume in m³
5 m × 4 m × 0.15 m equals 3.0 m³. Surface area alone is not enough; thickness must be included.
088 · REAL ESTATE & BUILD
Concrete Volume Calculator
Calculate concrete volume in m³ from length, width, and thickness, then add an allowance and optionally estimate reference deliveries using a per-delivery volume you enter.
LOCALCALCULATE IN YOUR BROWSER
LOCALDimensions and reference quantities are calculated only in this browser and are not sent to or stored on a server.
CONCRETE VOLUMEDimensions
Display decimals
2
RESULT · m³
Base Volume3m³
Adjusted Volume3.15m³ · +5%
Reference Deliveries1deliveries · 6 m³ / deliveries
Formula
Base Volume = Length × Width × Thickness · Adjusted Volume = Base Volume × (1 + Extra Allowance/100) · Reference Deliveries = ceil(Adjusted Volume ÷ Ready-Mix Volume per Delivery)HOW TO USE
How to use
- 01
Enter the length, width, and thickness of the pour and choose mm, cm, or m for each dimension.
- 02
The calculator normalizes every dimension to meters and calculates base volume as length × width × thickness.
- 03
Enter a reference allowance from 0% to 100%. For example, adding 5% to 3.0 m³ gives 3.15 m³.
- 04
To estimate delivery count, enter the ready-mix volume per truck or delivery using a value confirmed for your supplier or site.
- 05
The adjusted volume is divided by the per-delivery volume and rounded up. If the per-delivery field is blank, delivery count is not calculated.
- 06
Use the result as an ordering reference and confirm site loss, pumping, transport, and supplier conditions before placing an actual order.
CONCRETE VOLUME
Concrete ordering quantity guide
Normalize mm, cm, and m
150 mm, 15 cm, and 0.15 m are the same thickness. Selecting a unit for each dimension helps prevent unit-mixing mistakes.
Separate base and adjusted volume
Adding a 5% allowance to 3.0 m³ gives 3.15 m³. The allowance is a user-selected reference, not an automatic judgment of site loss.
Enter your own delivery reference
Per-delivery volume can vary by supplier and site. Dividing 3.15 m³ by a 6 m³ reference and rounding up gives 1 reference delivery.
Treat it as an ordering reference
The volume result does not automatically include pumping, transport, leftovers, or minimum-order rules. Confirm them with the supplier before ordering.
Avoid intermediate rounding
The calculator normalizes dimensions to meters and retains internal precision until the display stage.
IMPORTANT NOTES
Important notes
- This tool calculates volume only; it does not design concrete mix, strength, slump, or structural safety.
- Ready-mix capacity per truck or delivery varies by supplier and operating conditions, so no fixed vehicle capacity is assumed.
- The allowance is a user-entered ordering reference and does not guarantee actual site loss or leftover volume.
- Selecting the wrong thickness unit can change the result dramatically. 150 mm, 15 cm, and 0.15 m are equivalent.
- Keep base volume separate from adjusted volume and confirm actual ordering quantities with site and supplier requirements.
- Dimensions are normalized to meters and calculated without intermediate rounding; rounding is applied only for display.
FAQ
Frequently asked questions
01How is concrete volume calculated?+
Multiply length × width × thickness. All dimensions are normalized to meters, so the result is shown in m³.
02What is 5 m × 4 m × 15 cm?+
15 cm equals 0.15 m, so 5 × 4 × 0.15 = 3.0 m³.
03What is 3.0 m³ with a 5% allowance?+
3.0 × 1.05 = 3.15 m³. The allowance is an ordering reference.
04How are reference deliveries calculated?+
Adjusted volume is divided by the per-delivery volume you enter and rounded up. 3.15 m³ with a 6 m³ delivery reference gives 1 delivery.