How to price a stainless steel work table
Ask three fabricators what a six-foot stainless work table costs and you will get three numbers and three different reasons. Not because anybody is wrong, but because the arithmetic has four or five places where a reasonable person makes a different assumption, and those assumptions are usually invisible.
Here is the whole calculation with nothing left out. The numbers are from a demonstration catalogue for a commercial kitchen fabricator rather than any real shop’s price list, so substitute your own rates as you read — the point is the shape of the working, not the total.
The job: one work table, 72 inches long, 30 inches deep, 34 inches high, in SS 304, with a full-length undershelf and a square-tube frame.
Step one: the top, as weight
Sheet is bought by weight and consumed by area, and the whole cost of a table hangs on crossing that boundary correctly.
A 16 SWG sheet is about 1.6 mm thick. Stainless runs about 7,900 kg per cubic metre, so a square metre of 1.6 mm sheet weighs about 12.64 kg. A square metre is 1,550 square inches, so:
0.008155 kg per square inch at 16 SWG.
That single number is the one worth writing on the wall. At 18 SWG (1.2 mm) it is 0.006116, and at 20 SWG (0.9 mm) it is 0.004587.
Now the blank size. A 72 by 30 top is not cut at 72 by 30, because it has to be folded. Allow two inches all round for the turn-down and you are cutting 76 by 34, which is 2,584 square inches.
2,584 × 0.008155 = 21.07 kg
At ₹286 a kilogram for 304:
21.07 × 286 = ₹6,027
If you quote from the finished size rather than the blank you would have used 2,160 square inches and got ₹5,038. That thousand-rupee gap is the single most common way a table is underquoted, and it gets worse on a tray-type top where the lip eats four inches a side rather than two.
Step two: the top, as labour
Fabrication labour is easiest to hold as a rate per square foot of finished top, because that is roughly how the work scales. At ₹62 per square foot:
(72 × 30) ÷ 144 = 15 sq ft → 15 × 62 = ₹930
A tray-type top is more work than a plain one for the same area — call it a quarter more, and say so in the formula rather than remembering it:
15 × 62 × 1.25 = ₹1,162
Add a consumables allowance for electrodes, discs, gas and the rest. ₹350 on a table of this size is about right and is the sort of number that should be a named rate rather than something someone rounds up at the end.
Top total: ₹6,027 + ₹930 + ₹350 = ₹7,307.
Step three: the undershelf
Same arithmetic, thinner sheet, less work. An undershelf takes 18 SWG because nothing is chopped on it, and it needs only about an inch of turn-down.
74 × 32 = 2,368 sq in × 0.006116 = 14.48 kg × ₹286 = ₹4,142
Polishing at ₹28 per square foot over 15 square feet is ₹420.
Undershelf total: ₹4,562.
Notice it is not far off two thirds of the top. Undershelves are routinely thrown in as an afterthought on a quotation, and they are not a small number.
Step four: legs and frame
This one is priced by length, not area. Four legs at 34 inches, plus perimeter bracing at twice the length plus twice the depth:
Legs: 4 × 34 ÷ 12 = 11.33 running feet Bracing: 2 × (72 + 30) ÷ 12 = 17.00 running feet 28.33 running feet
At ₹212 a running foot for 50 × 50 mm square tube in 304:
28.33 × 212 = ₹6,006
Four adjustable bullet feet at ₹95 is ₹380, and welding and assembly at ₹240.
Frame total: ₹6,626.
The table
| Part | Cost |
|---|---|
| Top (plain, 16 SWG 304) | ₹7,307 |
| Undershelf (18 SWG 304) | ₹4,562 |
| Legs and frame (50 mm tube, feet, welding) | ₹6,626 |
| Cost of the table | ₹18,495 |
Two things usually surprise people here. The first is that the frame is nearly as expensive as the top — tube is dear, and a table needs a lot of it. The second is how much of the total is material: about ₹16,550 of ₹18,495, or nine tenths. That ratio is why a stale steel rate is so much more dangerous than a stale labour rate, and why “we’ll use last quarter’s price, it hasn’t moved much” is an expensive habit.
Step five: margin, on the right base
Now the part that costs shops real money.
If you want to make 20 per cent, be clear whether that is 20 per cent of what you sell it for or 20 per cent on top of what it cost you. They are not the same:
Markup on cost: 18,495 × 1.20 = ₹22,194 Margin on selling: 18,495 ÷ 0.80 = ₹23,119
Nine hundred rupees a table, on six tables, on every job, forever. Most shops mean margin on selling and calculate markup on cost, because multiplying is easier than dividing.
At a 12 per cent margin on selling — a hotel-chain rate rather than a walk-in one — this table is about ₹21,000, before transport, installation and GST.
What changes when the grade changes
Everything above is 304. Run the same table in the other two grades and only the rates move:
| Grade | Sheet rate | Table |
|---|---|---|
| SS 202 | ₹168/kg | ₹12,622 |
| SS 304 | ₹286/kg | ₹18,070 |
| SS 316 | ₹449/kg | ₹23,977 |
Those are the same formulas with a different steel resolved underneath — a 90 per cent spread between the cheapest and the dearest version of an identical table. Any quoting process where the grade is a note typed on the line rather than something that reprices the job is going to be wrong by that much, some of the time.
Where this usually goes wrong
Five places, in rough order of how much they cost:
- Quoting the finished size instead of the blank. Cheapest mistake to fix, most common.
- A steel rate that moved. The formula is right and the input is three months old.
- Margin on the wrong base. Silent, systematic, and it compounds.
- The undershelf, the splashback, the extra shelf — treated as small because they are small parts, and quoted at a fraction of what they cost.
- Gauge assumed rather than checked. An 18 SWG top instead of 16 saves 25 per cent of the sheet weight, and a table quoted at one and built at the other is either a loss or a complaint.
None of these is an intelligence problem. They are all what happens when arithmetic that has five places to go wrong is retyped by a person under time pressure, several times a week. Write it down once — as a formula that takes the dimensions, looks up today’s rate and applies your own margin on your own base — and the same five mistakes stop being available.