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Rust Farm Calculator

Pick a crop and a target output — get the exact planters, lights, sprinklers, pumps, solar panels, and power your farm needs. Real in-game power values, editable yields.

Full Farm Calculator

Perfect GGGYYY

GGGYYY estimate — edit to match your farm

17Large Planters
17Ceiling Lights
5Sprinklers
1Water Pumps
5Solar Panels (peak)
49 rWTotal Power Draw

Power draw is exact from the game code: ceiling light 2 rW, sprinkler 2 rW, water pump 5 rW. Solar panels output 10 rW at peak daylight only — add batteries or roughly double the panels to cover night.

Yield (~60 cloth/planter/hr) assumes perfect GGGYYY clones (1.75× growth speed and 1.75× yield — code-confirmed) at good conditions, with a ~1.75 h grow time to ripe. The default is an estimate: Facepunch stores each plant's base yield and timing in game assets, so throughput is anchored to community farm data, not the decompiled code — edit the Yield field to match your own measured farm. Sprinkler count assumes a 3 m radius covering ~4 planters and depends on your layout.

Planning a Rust farm

Every automated farm is a chain: planters grow the crop, ceiling lights let them grow indoors and at night, sprinklers keep the soil watered, a water pump feeds the sprinklers, and solar panels (or a generator) power it all. Size the planters to your target output first; everything else scales from there.

The calculator above uses the real power draws from the game code — light 2 rW, sprinkler 2 rW, pump 5 rW, solar 10 rW at peak — so the electrical total is exact. Per-crop yield is a community-anchored estimate you can override with your own measured rate. To breed the perfect GGGYYY clones this assumes, use the crossbreeding planter.

Frequently Asked Questions

How much power does a Rust farm use?

Power draws are fixed by the game: a Ceiling Light is 2 rW, a Sprinkler is 2 rW, and a Water Pump is 5 rW. Total it up as one light per planter plus your sprinklers and pumps. Solar panels output up to 10 rW each, but only at peak daylight.

How many large planters do I need?

It depends on your target output. Enter your desired items per hour and crop above, and the calculator divides by that crop’s per-planter throughput (anchored to community farm data) to give the planter count, then sizes lights, sprinklers, pumps, and solar to match.

How many sprinklers per planter?

A sprinkler has a 3 metre radius, so one well-placed sprinkler can water several tightly-packed large planters — commonly around four, depending on layout and line of sight.

What is the best crop to farm in Rust?

Hemp is the top pick for cloth (sleeping bags, armour, and low-grade fuel). Berries feed the tea economy, while potatoes, pumpkins, and corn are efficient food. All use the same GGGYYY genetics for maximum speed and yield.