Diamond Painting Size Calculator: Drills to Centimeters
Turn a drill count into a finished size, or a canvas size into the number of drills you will place. Works for 2.5 mm, 2.8 mm and mini drills.
This tool runs in your browser, so you need JavaScript on to use the calculator. Everything below is the guide that goes with it.
How to use the diamond painting size calculator
Understanding the finished size of your diamond painting is easy with our calculator, which works in two helpful ways. If you know the number of drills wide and high, you can enter these along with your drill size (2.5 mm square, 2.8 mm round, or 2.0 mm mini). The calculator will then tell you the finished size in both centimeters and inches, plus the total drill count. Alternatively, if you know the canvas size in centimeters, you can input that, and the calculator will tell you how many drills wide and high your design will be, and the total drill count. For standard 2.5mm drills, there are typically 4 drills per centimeter. Remember to always check your specific kit, as canvases often have a printed margin around the design, meaning the actual usable drill area is slightly smaller than the overall canvas size. Common canvas sizes include 20x30 cm, 30x40 cm, 40x50 cm, 50x70 cm, and 60x80 cm.
When you're diving into a new diamond painting project, selecting the right canvas size and drill shape is key to a beautiful finished piece. Our Diamond Painting Size Calculator can help you figure out the perfect fit. Standard canvases often come in sizes like 20x30 cm, 30x40 cm, 40x50 cm, 50x70 cm, and 60x80 cm. You can use our calculator to see exactly how many drills you'll need for these common sizes, or for any custom dimension you have in mind.
For custom photo diamond paintings, knowing your desired finished size in centimeters will let the calculator tell you precisely how many drills wide and high your canvas should be. You can also work backward: if you know you want a certain number of drills, the calculator can show you the finished dimensions in both centimeters and inches. Remember that different drill sizes exist, such as 2.5 mm square, 2.8 mm round, or 2.0 mm mini drills, and the calculator accounts for these variations to give you an accurate estimate. Typically, a standard 2.5mm drill means you'll have about 4 drills per centimeter. Always double-check your kit, as canvases often include a printed margin, making the actual drillable area slightly smaller than the overall canvas size. If you're turning a photo into a diamond painting, our photo-to-diamond-painting pattern generator can help you get started.
Frequently asked questions
How many drills are in a 40x50 cm diamond painting?
For a standard 40x50 cm diamond painting using 2.5 mm square drills, you would typically have 160 drills wide (40 cm * 4 drills/cm) and 200 drills high (50 cm * 4 drills/cm). This results in a total of 32,000 drills (160 * 200). Our Diamond Painting Size Calculator can quickly confirm these numbers for you, and adjust if you're using different drill sizes.
How do I calculate the size of a diamond painting?
You can calculate the size of a diamond painting in two ways using our Diamond Painting Size Calculator. If you know the number of drills wide and high, you can input those along with the drill size (e.g., 2.5 mm square) to get the finished dimensions in centimeters and inches. Alternatively, if you know your desired canvas size in centimeters, the calculator can tell you how many drills wide and high you will need, and the total drill count.
What is the difference between round and square drills for size?
The main difference between round and square drills for sizing is their individual dimensions. Standard square drills are typically 2.5 mm, while standard round drills are often 2.8 mm. This means a canvas with 2.8 mm round drills will have slightly fewer drills per centimeter compared to one with 2.5 mm square drills for the same finished size. Our calculator accounts for these different drill sizes when providing dimensions and drill counts.
Why is the finished size smaller than the canvas size?
The finished size of your diamond painting design is often smaller than the overall canvas size because real canvases typically include a printed margin around the design area. This margin isn't meant for drills; it provides space for handling, framing, or simply for the manufacturer's information. So, the usable drillable area will be a little smaller than the full canvas dimensions you might see advertised.
What size should I choose for a custom photo diamond painting?
When choosing a size for a custom photo diamond painting, consider the detail in your photo and your desired display size. Our Diamond Painting Size Calculator can help you. You can enter your preferred canvas size in centimeters to see how many drills wide and high that would be. For example, common sizes are 30x40 cm or 40x50 cm. A larger canvas with more drills will generally capture more detail from your original photo. You can also visit our photo-to-diamond-painting pattern generator for more guidance.
Related tools and guides
Want a chart from a photo? Try the crochet pattern maker or the cross-stitch pattern maker.