51.9 ac/h is a field-pass number. Your daily acres come from the whole system.
DJI's 21-hectare-per-hour field reference is an in-field test result, not an eight-hour daily guarantee. Daily acres depend on the refill, battery, mixing, ferry, field geometry, travel and weather system around the aircraft.
A T50 does not have one honest acres-per-day number. In the three transparent planning scenarios below, one aircraft completes about 244 acres in a highly efficient large-field day, about 133 acres in a typical mixed-farm day, or about 53 acres across fragmented fields. These are calculated examples, not measured SpeedyDrone performance or DJI guarantees.
Why 21 hectares per hour is not 415 acres per day.
Converting DJI's headline is easy: 21 ha/h equals about 51.9 ac/h, and multiplying that by eight gives about 415 acres. The arithmetic is correct. The daily-production conclusion is not.
DJI states that its 21 ha/h result was measured at 15 L/ha, an 11 m spraying width, 7 m/s flight speed and 3 m height. That describes the field pass. It does not add startup, product mixing, loading, landing, battery handling, equipment moves, mapping, obstacles, weather holds or end-of-day cleaning.
2.471 acres per hectare
8 clock hours
refills, turns, batteries, mixing, ferry, moves, weather and setup
output of the complete field system
Start with application volume. Then count complete tank cycles.
The 40 L spray tank only becomes an acreage number after application volume is known. Flight and ground-support time then determine how many full cycles fit inside the usable part of the day.
Usable litres ÷ legal L/ha
Tank hectares ÷ effective in-field rate
Spray minutes + refill / battery / service minutes
Whole cycles × tank hectares × 2.471
One large field, short refill path, ready batteries, premixed supply and little lost time.
Multiple fields, moderate application volume and ordinary servicing or setup losses.
Small parcels, obstacles, equipment moves, higher volume and a shorter usable spray window.
All three scenarios assume 40 usable litres per tank and ignore partial final cycles. They are planning models created for this article, not field-test results or application recommendations. Use the legal product-label spray volume and the aircraft's actual permitted payload.
Review the current Agras T50 package
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Can one T50 finish 1,000 acres inside the application window?
Using the example outputs and rounding up to whole working days, the answer ranges from about five days to nineteen days. The aircraft is the same. The operational assumptions are not.
An acreage purchase decision should start with the actual crop, legal application volume, field map, travel pattern, crew, water supply, batteries and number of usable weather days.
Why a second drone may not double your acres.
Two aircraft can only approach twice the output when the ground system can feed both aircraft without creating a queue.
If one mixing station, loader, battery process, generator or transport vehicle is already at capacity, the second T50 spends more time waiting. Crew and compliance can also determine whether simultaneous operation is practical.
Read Can One Pilot Operate Multiple DJI Agras Drones in Canada?
Can the legal mix be prepared, agitated, measured and transferred fast enough for two refill cycles?
Can the loading workflow serve both aircraft without cross-contamination, spill risk or idle time?
Are enough serviceable batteries, cooling positions and charging power available for concurrent demand?
Are pilot, observer, mixer/loader and support roles staffed for the actual Canadian operation and product label?
Can both aircraft work useful routes without crowding the same staging point or increasing ferry distance?
Build a farm-specific capacity sheet before you buy.
A useful estimate should be traceable. If a number cannot be connected to the label, field map, equipment list or crew plan, it is not ready for a purchase decision.
The T50 has a 40 L spray tank. DJI specifies up to 16 L/min with two sprinklers or 24 L/min with the optional four-sprinkler configuration. Flow capacity does not establish legal application volume, effective swath or daily acres.
Start with the label: record permitted aerial spray volume, rate, droplet class, buffer zones and weather limitations.
Map usable field geometry: separate long rectangular acres from headlands, obstacles, excluded areas and small parcels.
Measure ferry distance: locate water, mixing, battery and landing points relative to the working route.
Time a complete cycle: include landing, servicing, refill, battery readiness, checks and return to productive spray.
Budget non-cycle losses: subtract setup, moves, breaks, weather holds, troubleshooting and cleaning.
Test the bottleneck: compare aircraft demand with mixing, loading, water, battery, charging, cooling, transport and crew capacity.
Plan contingency: calculate the application window with conservative and high-output cases rather than one optimistic day.
DJI Agras T50 acres-per-day questions
How many acres can a DJI Agras T50 spray in one day?
There is no universal number. The illustrative models in this guide produce about 244 acres for a highly efficient large-field day, 133 acres for a typical mixed-farm day and 53 acres for fragmented fields. These are calculations based on stated assumptions, not guaranteed performance.
Does DJI rate the T50 for 21 hectares per hour?
Yes. DJI lists a 21 ha/h field-operation reference, equivalent to about 51.9 ac/h. DJI states that the test used 15 L/ha, an 11 m spraying width, 7 m/s flight speed and 3 m height. Operating environment and parameters can change the result.
Why can’t I multiply 21 hectares per hour by eight hours?
That multiplication assumes continuous field operation with no refilling, landing, battery handling, mixing, ferry, turns, obstacles, equipment moves, weather holds, setup or cleaning. A daily forecast must subtract those losses and model complete tank cycles.
How many acres does one 40 L T50 tank cover?
Divide 40 L by the legal application volume in L/ha, then convert hectares to acres. At 15 L/ha, for example, 40 L covers 2.67 ha or about 6.59 acres. This is arithmetic only, not an application-rate recommendation.
What most affects T50 daily field capacity?
Application volume, usable payload, effective swath and speed, refill location, ferry distance, battery and charging logistics, mixing and loading capacity, field geometry, obstacles, equipment moves, weather, crew and compliance all affect completed acres.
Can one T50 finish 1,000 acres?
It can, but the number of working days depends on the operation. The three models in this guide require approximately 5, 8 or 19 working days for 1,000 acres. Weather and other downtime can extend the calendar window.
Will two T50 drones double daily acreage?
Not automatically. Output may fail to scale when mixing, loading, water supply, batteries, charging, cooling, transport, crew or the staging location becomes the bottleneck. Multi-drone operation must also fit current Canadian aviation and pesticide requirements.
What information should I give SpeedyDrone for a capacity estimate?
Provide the province, total acres, crop, legal spray volume, field maps, field count and size, timing window, water and staging locations, expected weather constraints, battery and power plan, crew plan and whether one or multiple aircraft are being considered.
Sources and calculation boundary
- DJI Agriculture: Agras T50 product page and 21 ha/h test conditions
- DJI Agriculture: Agras T50 technical specifications
- DJI Agriculture: T50 corn-operation case study and field image source
- Health Canada: SPN2026-02 on pesticide application by RPAS
- SpeedyDrone Canada: DJI Agras T50 package
Information checked August 16, 2026. Scenario A, B and C are original planning calculations for this article. They are not DJI test results, SpeedyDrone field guarantees, pesticide recommendations or legal advice. Recalculate with the exact product label, aircraft load recommendation, field map, crew, weather and Canadian operating requirements.
Turn acres and application window into an operating plan.
Send SpeedyDrone the field map, legal spray volume, timing window, staging plan and crew assumptions. We can help model the aircraft, battery, charging and field-support workflow before you buy.
