Practical guide
How to Estimate Roof Tiles in South Africa
Estimate main roof tiles from net sloping area and installed product coverage. Add one waste allowance, round to whole packs, and count accessories separately. Confirm pitch, gauge, laps and the exact product before ordering.
Updated 16 October 2026
Reviewed by the 99tools team. Editorial and corrections policy.
How to use the Roof Tile Calculator
Choose measured sloping area when it is already known. Otherwise enter horizontal plan dimensions including overhangs and a common pitch in degrees. Never apply pitch correction twice. Deduct only measured openings on the sloping surface. For different pitches or mixed roof products, calculate separate areas and have the supplier reconcile the combined order.
Roof tiles per m² and tile size
Enter installed units per m² from the exact profile specification at the required gauge and lap. Overall length × width does not give installed cover because tiles overlap. Concrete, clay, slate and steel tile-profile panels have different coverage systems. The calculator has no universal product rate and does not choose permitted pitch or batten spacing.
Double Roman, Marley and other product names
A profile or brand name alone does not fix coverage, colour, pack count or pitch requirements. Double Roman and flat profiles can have different specifications; overseas Marley, Monier or Redland product data should not be substituted for a South African item without confirmation. Use the selected supplier’s current product data and exact unit of sale.
Worked roof tile and pallet example
A hypothetical 100 m² sloping roof at 10 units/m² with 10% waste requires 1,100 units. Packs of 240 mean five packs supplying 1,200 units. At an example R12 per purchased unit, the main field material cost is R14,400 before delivery and accessories. These values are arithmetic examples, not a product specification or current price.
Ridge and hip accessories
Enable accessory estimation for one matching ridge or hip product. Enter total linear metres, installed cover length per unit, accessory allowance and pack size. Do not use overall accessory length where overlap reduces cover. Count different fittings separately. This estimate does not include junctions, end caps, verges, valleys, flashings or fixing systems unless separately priced as an entered allowance.
Hip roofs and complex shapes
A hip roof still needs the actual total sloping field area and separate hip/ridge measurements. A plan correction with one pitch is only a geometric area estimate for the entered horizontal roof projection. It does not infer hip lengths, valleys, dormers, variable pitches or every cut from a simple rectangle. Confirm a detailed roof take-off before ordering.
Roof tile price and full roof cost
Choose a main-field quote per tile/panel or per full pack. Enter optional accessory unit price, delivery and other quoted material allowances on the same VAT basis. The calculator adds no extra VAT. These are entered material costs; labour, structure, underlay, battens, fasteners and solar mounting are not automatically included. Use the related Roof Cost Calculator for a broader quoted scope.
Cashbuild roof tile calculator comparisons
99tools is independent. For a Cashbuild or other supplier comparison, match profile, finish, installed coverage, pack count and quote basis. There is no universal roof tile pallet quantity or live national price here. Check local stock, quote dates, pallet charges, breakage and delivery terms.
Use the related calculators
Apply the explanation above with your own figures. Open a calculator below, check every input and review the result assumptions before making a decision.
Frequently asked questions
How many roof tiles do I need per m²?
Use installed coverage for the exact product and laying conditions. There is no universal rate for concrete, clay, slate and tile-profile steel sheets.
How many roof tiles are in a pallet?
Pack quantities vary by product and supplier. Enter the actual units per pack or pallet from your selected quote.
Can I calculate a hip roof?
Yes, using its measured total sloping field area. Enter hip/ridge accessories separately; the tool does not derive complex roof geometry or hip lengths from one rectangle.
Is this a Cashbuild or Marley roof tile calculator?
No. 99tools is independent. You can enter the exact product coverage, pack count and quote from the chosen supplier or manufacturer.
How much does one roof tile cost?
Use a current quote for the exact profile, finish and location. The calculator estimates purchased material cost from your inputs rather than loading live prices.
Does it calculate paint, waterproofing or solar mounting?
No. Those need their own product coverage, compatible systems and roof assessment. Optional quoted material allowances do not establish installation suitability.
Can I use a UK or Australian product rate?
Only if it is confirmed for the exact product and installation being purchased. This page focuses on South Africa and does not assume overseas rates match local items.