How Many Acres Can a Spray Drone Cover in an Hour (and a Day)?

By Ag Drone Sprayers Editorial Team · Updated July 3, 2026

The brochure number and the field number are different animals. A modern 10–15 gallon spray drone is rated to cover 40–50 acres an hour in ideal conditions; a well-run crew sustains more like 25–40once refills, battery swaps, and ferry time are counted. Here’s the math behind the number, so you can size up any operator’s claim.

The cycle math

A spray drone works in cycles: fill, fly, spray, return, swap battery, repeat. At 2 GPA (gallons per acre) a 12-gallon tank treats about 6 acres per cycle. A full cycle — spraying plus the round trip and the swap — takes roughly 8–12 minutes with a practiced ground crew. Five to six cycles an hour puts sustained coverage at 30–36 acres per hour. Raise the rate to 5 GPA and the same tank covers 2.4 acres per cycle — coverage drops by more than half.

What moves the number

• Application rate (GPA).The big one, as above. Many fungicide labels set minimums, so “fast” quotes at sub-label rates are a red flag, not a bargain.
• Ferry distance. A mixing trailer parked at the field edge keeps cycles tight; a staging area half a mile away bleeds minutes from every cycle.
• Field shape and obstacles. Long straight passes fly efficiently. Point rows, terraces, and tree lines add turns and slow-downs.
• Crew practice. The difference between a 7-minute and a 12-minute cycle is almost entirely ground-crew choreography — batteries charged, mix ready, swap rehearsed.
• Weather windows.Labels bound wind and temperature; inversions shut down evenings. A “day” is often 6–8 sprayable hours, not 12.

Per day, realistically

Put it together and a single-drone crew commonly covers 150–350 acres in a working day; disciplined multi-drone crews scale roughly per aircraft. For scheduling, the practical question isn’t the operator’s best day — it’s whether your acres fit their calendar inside your agronomic window. Book tassel-stage fungicide before the rush, not during it.

What this means for your quote

Coverage drives cost, which is why per-acre rates fall on big easy fields and rise on small awkward ones. Typical row-crop application runs $12–$18 per acre — see the cost per acre guide for the full breakdown, or price your own fields with the cost calculator. When comparing operators, ask each for acres per day at your label’s GPA— it’s the fastest way to spot who actually runs a tight crew.