I’m working on converting my Figma designs into Flutter screens but I’m running into issues with pixel measurements not matching up between the two platforms. When I design something in Figma, the dimensions don’t translate directly to Flutter, which makes the development process really slow and frustrating.
For example, if I set a container width to 200px in Figma, it doesn’t look the same when I use that same value in Flutter. This means I have to constantly adjust values and do a lot of trial and error to get things looking right.
Is there a workflow or method that can help me avoid these pixel conversion issues? Maybe some tool or technique that makes the transition from Figma mockups to Flutter code more seamless? I want to speed up my development process and not spend so much time tweaking measurements.
Here’s what worked for me: set up a proper design system between Figma and Flutter from day one. I design everything at the same base resolution, then use a simple formula in my Flutter code - multiply Figma measurements by a scale factor (MediaQuery screen dimensions ÷ Figma canvas width). Don’t copy pixel values directly. The game changer? Stop trying to match pixels exactly. Use Figma as a visual guide for proportions instead. I keep a constants file with standardized spacing that matches my Figma tokens. No more guesswork - just reference predefined values instead of random pixels. Once you nail down these math relationships between design and code, everything flows way smoother.
flutter_screenutil is a lifesaver for this. I wasted weeks doing manual conversions before finding it. Just wrap your MaterialApp with ScreenUtilInit, set the design size to match your Figma artboard, then add .w and .h to your numbers. So Container(width: 200) becomes Container(width: 200.w) and it scales perfectly. The plugin figures out the scaling factor by comparing your design size to the actual device screen. I’ve shipped multiple apps this way - no more guesswork. Your 200px Figma measurement looks identical across all devices.
I encountered this issue when I began translating Figma designs into Flutter a couple of years ago. The main problem lies in the difference between how Figma represents pixels and Flutter’s logical pixel density. To resolve this, I recommend establishing a baseline design width in Figma (I typically use 375px for mobile). Then, in Flutter, utilize MediaQuery.of(context).size.width to compute dimensions proportionally. This method avoids hardcoding pixel values like 200px, allowing you to multiply your design width by the screen width ratio instead. It drastically reduces the time spent on adjustments. Additionally, consider utilizing Flexible and Expanded widgets for creating responsive layouts instead of relying on fixed dimensions. This approach fundamentally changes the game. The insight here is to view Figma measurements as ratios rather than fixed values; once you adapt to this perspective, the conversion process becomes significantly easier, ensuring your layouts function effectively across various devices without the need for frequent adjustments.
skip the exact pixels - use responsive breakpoints instead. learned this the hard way when i discovered figma uses web pixels but flutter uses device pixels. completely different systems. focus on proportions and constraints like minWidth/maxWidth rather than trying to match exact measurements. way more reliable than pixel-perfect conversions that’ll break on different screens anyway.