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Calcimator

Pixel Art Scale Calculator

Calculate canvas size and scale factors for pixel art projects.

About this calculator

Pixel art is drawn at a tiny native resolution and then displayed much larger, and the golden rule of doing that cleanly is scaling by a whole number — 2x, 3x, 16x — never a fractional amount, because any non-integer scale blurs crisp pixel edges or produces uneven pixel sizes across the image. This calculator takes your canvas's native width and height along with your target display resolution, and returns the largest whole-number scale factor that fits your canvas inside that target without exceeding it in either dimension. It computes a separate scale for width and height, then uses the smaller of the two so the image stays proportional rather than stretching in only one direction.

It also works backward, telling you the largest canvas size that would still fit your target display at a clean 2x or 4x scale — useful when you're planning a new sprite sheet or tileset and want to pick a native resolution that scales evenly. Canvas height is typically what constrains the result for widescreen targets, since most displays are wider than they are tall relative to a square or near-square pixel art canvas. What this doesn't handle is non-square pixel aspect ratios (used in some retro console formats) or partial-pixel subpixel rendering techniques — it assumes standard square pixels scaled by a clean integer factor.

Inputs

px
px
px
px

Results

Max Integer Scale

16×

Output Width1,024 px
Output Height1,024 px
Canvas Pixels4,096
Max Square Canvas for 4× Scale270 px
Max Square Canvas for 2× Scale540 px
How to Use This Calculator
  1. Enter Canvas Width, Canvas Height, and Target Display Width.
  2. Set Target Display Height.
  3. Review the Max Integer Scale (×) result.
  4. Use Output Width (px) and Output Height (px) to inform your decision.

How the result changes with Canvas Height

Canvas HeightMax Integer Scale
3230×
4822×
9611×
1606×

What each input means

Canvas Width
Width of the pixel art canvas (native resolution).
Canvas Height
Height of the pixel art canvas (native resolution).
Target Display Width
Display/export width in pixels.
Target Display Height
Display/export height in pixels.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Canvas Width = 64, Canvas Height = 64, Target Display Width = 1920, Target Display Height = 1080 = 4 input(s) provided
  2. Calculate Max Integer Scale
    Max Integer Scale
    16 = 16
  3. Calculate Output Width
    Output Width
    1024 = 1024
  4. Calculate Output Height
    Output Height
    1024 = 1024

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

Why won't the output dimensions exactly match my target resolution?

Because integer scaling only allows whole-number multiples of your canvas size, the output rarely lands exactly on the target unless the target happens to divide evenly by the canvas. A 64px canvas scaled 16x produces a 1024px image, which is smaller than a 1920px target — the calculator deliberately stops at the largest whole-number scale that still fits rather than stretching the last bit to fill the frame.

Why not just scale to fill the screen exactly, even if it's not a whole number?

A fractional scale factor means some source pixels map to more display pixels than others, which blurs edges and breaks the crisp, uniform-block look that defines pixel art. Integer scaling keeps every source pixel exactly the same size on screen, which is why engines like sprite renderers and pixel-art game exporters insist on whole-number scale factors.

What's the difference between the max canvas for 2x and 4x scale figures?

They work backward from your target resolution to tell you the largest native canvas size that would still reach that target using a clean 2x or 4x multiplier. This is useful when planning a new piece: if you know your target display size in advance, these figures tell you how detailed you can afford to draw at native resolution. Both figures assume a square canvas (equal width and height) — they take the smaller of your target width/N and target height/N, so for a non-square sprite (like a 32×48 character) treat the number as an upper bound on the shorter side, not an independent width and height.

Why is canvas height usually the limiting dimension?

Most target displays and export resolutions are wider than they are tall relative to a square pixel art canvas, so the height axis typically runs out of room for another whole scale step before the width axis does. This calculator takes the smaller of the width-based and height-based scale factors, so whichever dimension is more constrained sets the final scale.

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