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Enter your values, then click Calculate result.How this calculator helps
This paver calculator combines a rectangular module estimate with separate base and bedding volume calculations. Enter the net paved area, actual paver face dimensions and joint width. Supply the ordering depth for each bulk layer and an explicit allowance applied to all three quantities. A container volume converts the estimated base and bedding volumes into rounded counts of equal-volume containers. This is more than a tile count: the results keep paving units, base aggregate and bedding separate so a quantity cannot be mistaken for another material. The worksheet does not select a structural base depth, a compaction factor, a drainage detail or a joint-sand product.
How to use it
- 1
Measure the net paved area in square metres and account for excluded sections.
- 2
Enter actual paver length, width and planned joint width in millimetres.
- 3
Obtain suitable ordering depths from the design and supplier.
- 4
Enter the allowance and the actual volume per container.
- 5
Calculate and check paver count, each layer’s volume and each rounded container count separately.
Formula and methodology
Module coverage M = (paver length + joint) × (paver width + joint) / 1,000,000. Pavers = ceil(net area/M × allowance factor). Base or bedding ordering volume = net area × supplied ordering depth/1000 × allowance factor. Containers = ceil(volume × 1000 / supplied container litres).
The calculator applies the displayed arithmetic to the values entered on this device. It does not silently load a local tax rate, currency conversion or commercial assumption.
Worked calculation example
For 20 square metres, 200 × 100 mm pavers and 3 mm joints, each rectangular module covers 0.203 × 0.103 = 0.020909 square metres. With a 10% allowance, the estimate is 1,053 pavers. A supplied base ordering depth of 100 mm gives 2.2 cubic metres after the same allowance, while a 25 mm bedding depth gives 0.55 cubic metres. If the supplier’s container holds 20 litres, those separate volumes require 110 and 28 containers respectively. These example depths and allowances are user assumptions, not a pavement design recommendation.
How to interpret your result
The three material outputs share one entered area but answer separate procurement questions. Paver count describes surface modules; layer volumes describe supplied depth scenarios. The page’s whole-container counts are packaging arithmetic, not evidence that a product is appropriate for the proposed pavement.
For different inputs or formulas, use Gravel, Stone and River Rock Calculator; Sand Calculator; Brick Wall Takeoff Calculator.
Related questions this calculator covers
- Paver quantity with explicit joint coverage
- Separate base aggregate and bedding sand volumes
- Volume-container ordering and allowance checks
Scenario comparison
| Scenario | What it shows |
|---|---|
| 20 m² illustration | A 203 × 103 mm module and 10% allowance give 1,053 paving units. |
| Base volume | Twenty square metres at 100 mm ordering depth and 10% allowance gives 2.2 m³. |
| Bedding containers | A 0.55 m³ ordering volume in 20-litre containers requires 28 whole containers. |
Common mistakes to avoid
- Entering the paver’s nominal joint-included size and then adding the joint again.
- Using a compacted design depth as a loose ordering depth without supplier confirmation.
- Treating a kilogram bag label as the entered volume in litres.
Convert millimetres to metres before multiplying dimensions. Check that one cubic metre equals 1,000 litres, then divide each layer’s ordering litres by container volume. Compare coverage with the product specification and verify depth, extra base area and ordering conventions with the design owner.
Authoritative reference. CMHA’s interlocking-pavement bulletin describes the distinct base, bedding and paver layers. SolvePilot uses supplied depths rather than reproducing or prescribing a construction specification.Build a material list with separate bases
A practical order list records the paving-unit type, estimated units, base material, bedding material and the measurement basis for each. Do not add base and bedding volumes together and call the total one material. The layer thicknesses and product specifications differ, so a single combined volume can conceal an incorrect substitution. Keep each result beside the input depth that produced it.
The allowance is deliberately visible instead of hidden in a preset named patio or driveway. You can run a low-allowance and a higher-allowance scenario to see how the order changes. That comparison does not establish a correct waste rate. Cuts, handling loss, edge geometry and supplier packaging all affect the practical choice, and the installer should confirm the quantities before a consequential purchase.
Check packaging before converting to bags
A twenty-litre container is a statement about volume. A twenty-kilogram bag is a statement about mass. They might refer to different amounts even when the printed number is the same. If a supplier specifies only weight, obtain the material’s ordering density or its coverage yield and use a separate conversion. Do not rely on an assumed universal density to make the bag count look complete.
The base and bedding container counts here use the same submitted capacity for clarity. If their packaging differs, keep the continuous volumes and divide each by its own documented capacity separately. The continuous quantity is the source value; the rounded count is a procurement representation. This distinction makes it easier to compare bulk delivery with packaged material without changing the underlying geometric volume.
What can affect the result?
Module and pattern
The rectangular module adds the same entered joint to length and width. Special interlocking shapes, mixed-size patterns and border units need their own layouts or coverage specification. Do not infer their yield from an ordinary rectangle.
Base ordering depth
Ordering depth must already reflect the supplier’s appropriate loose-volume basis if that is how material is sold. The tool does not infer compaction losses or convert compacted depth into loose delivery volume.
Area outside paving
Some designs extend base beyond the visible paved edge. This worksheet uses the submitted area for both layers and does not add an automatic overdig perimeter. Include justified extra base area in a separate calculation.
Containers and allowance
Containers are volume-based, not weight-based. A mass label alone cannot establish litres without a valid density or yield. The same allowance applies to the pavers and both layers; run separate scenarios when they need different allowances.
Privacy and browser processing
Values entered on this page are processed in the current browser session. SolvePilot does not require an account and does not receive the values entered into the calculator. Refreshing or closing the page clears the working values unless the browser itself restores a previous session. Avoid entering identifying or account information because the calculation needs summary values only.
Accuracy and verification
Accuracy depends first on input quality. Confirm definitions, scales, dates and source information before entering a value. Keep an independent record of any result used for planning because this page does not create an official statement or retain a calculation history.
Limits of this estimate
Preliminary rectangular-module and supplied-depth quantity arithmetic. No pavement loading design, freeze-thaw rule, drainage assessment, soil bearing model, compaction prescription, joint-sand bag yield, mixed-size pattern or installation approval is supplied. Verify product coverage, the layer design and ordering basis with the supplier and installer.
Sources and review information
Frequently asked questions
How many pavers do I need?＋
Divide net paving area by the entered rectangular face-plus-joint module, add the submitted allowance and round the final unit count upward.
Does this calculate paver base and bedding sand?＋
Yes. It multiplies the submitted area by each supplied ordering depth and allowance. It does not recommend those depths or choose a compaction factor.
Can I use a bag labeled in kilograms?＋
Only after you obtain the actual volume or verified coverage yield. Kilograms cannot be entered as litres; mass and volume are different measures.
Does the base extend beyond the paved edge automatically?＋
No. If your design requires extra base area, calculate that area separately and verify it with the installer. No universal edge extension is assumed.
Why is bedding container count rounded upward?＋
An order requires whole containers. The geometric volume remains visible, so the extra capacity caused by rounding can be checked independently.