🖼️Digital Image Resolution
Dot per MillimeterをDot per Inch (DPI)に換算
Dot per Millimeter（dot/mm）からDot per Inch (DPI)（DPI）への無料オンライン単位換算ツール。計算式と換算早見表を掲載。
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Digital Image Resolution8 単位
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How the Calculation Works (Linear Scaling)
Formula:
Dot per Inch (DPI) = Dot per Millimeter × 25.4
Substitution:1 × 25.4
Calculated Result:25.4 DPI
Since 1 Dot per Millimeter = 25.4 Dots per Inch (DPI), multiply the value in Dots per Millimeter by 25.4.
Standard Ratio Factor:1 dot/mm = 25.4 DPI
Dot per Millimeter to Dot per Inch (DPI) Conversion Table
Precomputed values for quick reference and printing.
Dot per Millimeter → Dot per Inch (DPI)(dot/mm → DPI)
| Dot per Millimeter | Dot per Inch (DPI) |
|---|---|
| 1 dot/mm | 25.4 DPI |
| 2 dot/mm | 50.8 DPI |
| 3 dot/mm | 76.2 DPI |
| 4 dot/mm | 101.6 DPI |
| 5 dot/mm | 127 DPI |
| 6 dot/mm | 152.4 DPI |
| 7 dot/mm | 177.8 DPI |
| 8 dot/mm | 203.2 DPI |
| 9 dot/mm | 228.6 DPI |
| 10 dot/mm | 254 DPI |
| 15 dot/mm | 381 DPI |
| 20 dot/mm | 508 DPI |
| 25 dot/mm | 635 DPI |
| 30 dot/mm | 762 DPI |
| 40 dot/mm | 1016 DPI |
| 50 dot/mm | 1270 DPI |
| 75 dot/mm | 1905 DPI |
| 100 dot/mm | 2540 DPI |
Dot per Inch (DPI) → Dot per Millimeter(DPI → dot/mm)
| Dot per Inch (DPI) | Dot per Millimeter |
|---|---|
| 1 DPI | 0.039370079 dot/mm |
| 2 DPI | 0.078740157 dot/mm |
| 3 DPI | 0.1181 dot/mm |
| 4 DPI | 0.1575 dot/mm |
| 5 DPI | 0.1969 dot/mm |
| 6 DPI | 0.2362 dot/mm |
| 7 DPI | 0.2756 dot/mm |
| 8 DPI | 0.315 dot/mm |
| 9 DPI | 0.3543 dot/mm |
| 10 DPI | 0.3937 dot/mm |
| 15 DPI | 0.5906 dot/mm |
| 20 DPI | 0.7874 dot/mm |
| 25 DPI | 0.9843 dot/mm |
| 30 DPI | 1.1811 dot/mm |
| 40 DPI | 1.5748 dot/mm |
| 50 DPI | 1.9685 dot/mm |
| 75 DPI | 2.9528 dot/mm |
| 100 DPI | 3.937 dot/mm |
📌 Standard Benchmark Reference Values
12 dot/mm=≈ 304.8 DPI
Standard industrial thermal barcode printhead resolution (12 dpmm × 25.4 = 304.8 DPI).
Exact RatioDot per Millimeter (dot/mm)
A metric print density unit equal to 1,000 dots per meter (approx. 25.4 DPI).
Dot per Inch (DPI) (DPI)
A traditional measure of physical print resolution, expressing the number of discrete ink dots or laser exposure points a printer can produce per linear inch (1 / 0.0254 dot/m ≈ 39.370 dot/m). Note: DPI describes physical printer ink droplets, which must not be confused with image sample pixel density (PPI).