# Screen Size Calculator

> Screen size calculator: convert between diagonal, width, and height by aspect ratio and compare the viewing area of TV or monitor sizes. Free, no signup.

- **Canonical URL:** https://boringtoolskit.com/screen-size-calculator/
- **Category:** Converters
- **Evidence level:** authored-methodology
- **Reviewed:** 2026-09-20
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

## How it works

Diagonal in inches, with aspect ratio deciding the actual dimensions: 16:9 at 55 in is 48.1 x 27.0 in. Pixels-per-inch = sqrt(w^2 + h^2) / diagonal for the resolution.

## Assumptions

- Manufacturer charts vary; conversion outputs are the standard-mapping midpoint.
- Measurements are body measurements unless the tool labels them as garment measurements.
- Between-size results round per the rule stated in the FAQ.

## Common questions

### Is a bigger screen always better for work?

Only if resolution and viewing distance keep up. Text sharpness depends on pixels per inch; a 32-inch 1080p screen shows larger, softer pixels than a 27-inch 1440p at the same distance.

## Sources

- [Aggregated manufacturer sizing conventions](https://boringtoolskit.com/methodology/)

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