Drip Irrigation Cost per Acre: How to Work It Out

Start from the roll, not the acre

A drip lateral is sold by the roll and a field is measured in acres, so the two have to be converted before any price means anything. Our 12 mm flat inline lateral is 5000 metres to the roll at an M.R.P. of ₹4,585, which comes to about 92 paise a metre.

That per-metre figure is the useful one, because it turns the question from what a roll costs into what your field actually needs.

Row spacing is the whole calculation

An acre is 4,047 square metres. Where laterals run down every crop row, the metres you need is that area divided by the row spacing. At 1.2 metre rows an acre needs about 3,370 metres, roughly two thirds of a roll and about ₹3,090 of lateral. At 1.5 metres it is about 2,700 metres, around ₹2,470. At 1.8 metres it is about 2,250 metres, around ₹2,060.

Wider rows costing less is not obvious until you do the division. The catch is that wider rows also mean fewer emitters per square metre, so the same crop can need a longer run or a higher discharge to put the same water down.

What that number leaves out

The lateral is the largest single line, but it is not the system. A working installation also needs the filter, the sub-main, the take-off connectors and valves, the end fittings, and the labour to lay it all.

So treat the per-acre figure above as the lateral budget and price the rest against a proper quotation. A quotation also lets you check the one thing a per-acre figure cannot: that the pipe being quoted is IS 13488 material and not a lighter wall at the same price.

Common questions

Is a longer roll cheaper per metre?

No. A 5000 metre roll is priced as a roll, so the rate per metre is the same however much you buy. Buying in full rolls saves you joints rather than rupees, and fewer joints means fewer places for the system to leak or come apart.

Is 12 mm or 16 mm cheaper per acre?

Our 12 mm roll is ₹4,585 and the 16 mm roll is ₹6,225, both 5000 metres, so per acre the narrower pipe costs less. Whether it is the right choice depends on run length and slope rather than on price alone.

Does this figure include the subsidy?

No. These are M.R.P. figures before any subsidy, and subsidy is settled separately once the installation is approved. Our guide on the subsidy application covers how that side of it works.