Why are pixel results rounded?

Pixels are whole units. Print Prep Lab calculates from the exact physical measurement, then rounds each final dimension to the nearest whole pixel.

Does the result include bleed?

No. This calculator uses final trim size. Use the bleed and safe-area calculator when the artwork extends beyond the cut edge.

Can the result include decimal pixels?

No. A raster image uses whole pixels, so each final dimension is rounded only after the full unit conversion and multiplication.

Interactive browser tool

Convert Print Size to Pixels

Find the pixel dimensions needed for a print measured in inches, centimetres or millimetres at your chosen PPI.

Quick answer

Multiply each physical dimension in inches by the target PPI. Use the rounded whole-pixel result as the minimum export dimensions for the chosen target.

required pixels = print inches × PPI

Interactive calculator

pixels = inches × PPI

Physical print size → pixels

Example values are pre-filled. Results always reflect the values currently shown; replace them with your own measurements before using the result.

Print width

Print height

Target PPI

PPI

Quick targets

Calculated resultsUpdates as you change the inputs

Required pixel dimensionsPrimary result

2400 × 3000 px

Physical size in millimetresResult

203.2 × 254 mm

Required megapixelsResult

7.2 MP

Pixels required at common targets

Target	Pixel dimensions	Megapixels
150 PPI	1200 × 1500 px	1.8 MP
240 PPI	1920 × 2400 px	4.61 MP
300 PPI	2400 × 3000 px	7.2 MP

When to use this tool

Use it for a specific print decision.

Use it before creating or exporting artwork when the printer has supplied a final trim size and required image PPI.
Use it to brief a photographer, scanner operator or designer on the minimum raster dimensions for a planned product.
Use it to compare how much source resolution is needed at 150, 240 and 300 PPI before deciding whether upsampling is necessary.

How to use it

A result you can reproduce.

Enter the final trim width and height.
Choose the physical unit and target PPI.
Use the rounded whole-pixel dimensions for the source or export file.

Every result is calculated in the page from the displayed inputs. Your printer's written production specification remains the final authority.

Worked example · quick scenario

See the basic numbers in context.

An 8 × 10 inch print needs 1200 × 1500 px at 150 PPI, 1920 × 2400 px at 240 PPI or 2400 × 3000 px at 300 PPI.

Read the print-resolution guide →

Worked calculation

Follow the arithmetic from input to decision.

Inputs

Trim size: 210 × 297 mm (A4)
Target: 300 PPI
No bleed included

Calculation

210 ÷ 25.4 = 8.2677 in and 297 ÷ 25.4 = 11.6929 in.
8.2677 × 300 = 2480.31 px and 11.6929 × 300 = 3507.87 px.
Round only the final raster dimensions to whole pixels.

A4 trim needs 2480 × 3508 px at 300 PPI before bleed.

Assumptions

What must be true for this calculation to apply.

The physical dimensions describe the intended final trim unless the user deliberately enters the full bleed canvas.
The target PPI applies to raster content at final physical size.
Rounding occurs only after unit conversion and multiplication.

From calculation to production

Verify the Print size to pixels result with your real file.

Multiply each physical dimension in inches by the target PPI. Use the rounded whole-pixel result as the minimum export dimensions for the chosen target. Then compare the result with the print provider's written specification.

Check an image →