Your Drone's Weight Determines Your Regulatory Obligations in Sweden
Under EU Regulation 2019/947 and Luftfartslagen (Aviation Act), the weight of your drone at takeoff — including batteries, payload, and accessories — determines which operator category and subcategory you fall into. In the Open Category, the boundaries are clear: under 250g (subcategory A1 with further conditions), under 900g (A1 with competency requirements), under 4kg (A2), and under 25kg (A3). Cross a threshold, and your requirements change. Many operators know their drone's listed weight but do not account for accessories. A prop guard set, an upgraded battery, a mounted action camera, or a payload adapter can push a 249g drone over the 250g threshold. That single gram changes your registration requirements, competency obligations, and operational limitations.
MmowW's Weight Calculator Maps Weight to Regulation
The MmowW Drone Weight Category Calculator is a free tool that calculates your drone's total takeoff weight and maps it to the applicable Transportstyrelsen regulatory category. Enter each component, and the tool shows your total weight, the category you fall into, and the regulatory implications. No signup required. No data collected.
How It Works — Three Steps
Step 1: Enter your base drone weight. Start with the manufacturer's listed weight or the weight of your airframe if you build custom drones. Step 2: Add components. Enter each additional component: batteries, cameras, sensors, prop guards, payload adapters, and any other accessories that will be on the drone during flight. Step 3: Review your category. The tool calculates your total takeoff weight, identifies the applicable EU/national weight category, and lists the regulatory requirements associated with that category.Key Benefits for Operators in Sweden
Threshold awareness. The tool highlights when your configuration is close to a regulatory boundary, so you know that adding one more accessory could change your compliance obligations. Multi-configuration support. Enter different payload setups and compare their regulatory implications. This is essential for commercial operators who use multiple camera and sensor packages. Purchase decision support. Before buying a drone or accessories, check how the additional weight affects your regulatory category. Documentation. A weight calculation for each configuration supports compliance records and insurance documentation.Real Scenarios Where This Tool Helps
Scenario 1: A forestry operator mapping timber in Norrland. Planning a large-area forest survey in northern Sweden requires knowing whether the fully equipped drone stays within the intended weight category for the operation. Scenario 2: A photographer capturing Stockholm archipelago. When configuring a drone for recreational flight in complex coastal airspace, checking total takeoff weight ensures the operation remains within the correct regulatory category. Scenario 3: A mining surveyor in Kiruna. A industrial survey operations in a remote Arctic region may involve specialised payloads that significantly affect total weight and therefore regulatory obligations.FAQ
Q: Does the EU use metric or imperial weight measurements?A: EU regulations reference grams and kilograms. The tool accepts input in grams, ounces, or pounds and converts automatically.
Q: What counts as part of the takeoff weight?A: Everything on the drone at the moment of takeoff: airframe, battery, camera, sensors, prop guards, payload, and any other attached accessories. Spare batteries carried in your bag do not count.
Q: How often should I recalculate my weight category?A: Recalculate whenever you change your drone's configuration — new battery, different camera, added accessories, or removed components. Any change to the flight configuration potentially changes your regulatory category.
Try It Now — Free, No Signup Required
Know your exact weight category for every configuration. The MmowW Drone Weight Category Calculator combines precision weighing with regulatory awareness for Sweden.
Calculate your weight category nowWhat's Next?
Weight classification is foundational. Build on it with the Registration Requirement Checker to confirm your obligations, or the Insurance Cost Estimator to understand coverage costs for your weight category. MmowW builds tools for operators who take safety seriously — and makes them available for free. Loved for Safety. Ready for complete compliance management? kr67/month, less than a coffee. Explore MmowW Drone SaaS