Marble Calculator
Name a batch (like Kitchen or Bathroom), add every slab size under it, then start a new batch for the next area. Totals in square feet and square metres.
Grand total
Need to know how much marble you’re buying — or paying for? Punch your slab sizes into the calculator above and get the area in square feet and square metres instantly. Group slabs into batches (Kitchen, Bathroom, Stairs), add a wastage buffer, and even estimate the weight.
No formulas, no phone calculator, no guessing.
How to use this marble calculator
It’s built to match how marble is actually measured on site.
- Pick your unit — inches, feet, mm, cm or metres. Most Indian marble is quoted in inches or feet.
- Name a batch — like “Kitchen” or “Living room floor.” This keeps big jobs organised.
- Add each slab size — length, width and how many pieces of that size.
- Add another batch for the next area, and repeat.
- Set a wastage % for cutting and breakage, and (optionally) a thickness to estimate weight.
Your grand total updates as you type, with a clean per-batch breakdown so you can check the areas that matter.
Why measure in square feet and square metres
Marble is sold by area, not by piece. A single “6 × 2 slab” tells you nothing until you turn it into square feet.
Getting the area right is what stops the two classic mistakes: buying short and stalling the job, or over-ordering and paying for stone you’ll never lay.
| What you enter | What the calculator does |
|---|---|
| Length × Width per slab | Converts to square feet |
| Pieces | Multiplies for total area of that size |
| Wastage % | Adds a buffer for cutting and breakage |
| Thickness (mm) | Estimates slab weight for transport |
A quick note on the units: the tool converts everything to a common base, so you can mix a metric measurement here and an imperial one there without breaking the total — though it’s cleaner to stick to one unit per project.
How much wastage should you add?
For plain marble flooring, 5–10% is the usual buffer. Go toward the higher end if you have lots of cuts — small rooms, diagonal layouts, pillars, or busy patterns where offcuts can’t be reused.
For simple, large rectangular areas with few cuts, the lower end is fine. When in doubt, round up. Leftover marble from the same lot is worth having for future repairs — colour and veining are hard to match later.
Estimating marble weight
If you add a thickness, the calculator gives a rough weight so you can plan loading and transport. It uses an average marble density of about 2,560 kg/m³ — real stone varies a little by type and finish, so treat the figure as a planning estimate, not a weighbridge reading.
Bottom line
Measure every slab, group them into batches, add a sensible wastage buffer, and let the calculator handle the maths. You’ll walk into the market knowing exactly how many square feet of marble you need — and roughly what it’ll weigh.
Prefer to work on paper first? Download the free Granite & Marble Measurement Sheet and bring your numbers back here.
FAQ
How do I calculate marble in square feet? Multiply each slab’s length by its width in feet, then multiply by the number of pieces. Add up all the slabs. The calculator above does this for you in any unit — including inches, which is how most marble is quoted.
How do you calculate marble quantity for flooring? Measure the floor area, then add 5–10% for cutting and breakage. For a full walkthrough of the method, see how to calculate marble quantity.
What is the standard size of a marble slab? There’s no single standard — marble is a natural stone, so slab sizes vary by block and supplier. That’s exactly why you measure each piece rather than assume a fixed size.
How much marble wastage should I plan for? Around 5–10% for typical flooring. Add more for rooms with lots of cuts, patterns or awkward corners.
Can this calculator convert between square feet and square metres? Yes. Every total shows in both square feet and square metres at once, so you can quote in whichever unit your supplier uses.
How do I estimate the weight of marble? Enter a thickness in millimetres and the tool estimates weight from the slab area. It’s based on average marble density, so use it as a transport planning guide.
Does the calculator work for granite too? The area maths is identical for granite. Only the weight estimate differs, since granite is denser than marble — so for granite, read the weight as a rough figure and lean slightly higher.
Is this marble calculator free? Yes, completely free — like all the tile calculator and estimating tools on Yashika Home.