Compare Sizes — Two Objects, One Exact Ratio
The fastest way to compare sizes: name two objects, enter one dimension each, and read the exact ratio — A is 1.38× B — alongside a true-scale drawing where the multiple is something you can see.
- Exact size ratio
- Any objects
- Instant readout
Outlines are illustrative silhouettes; every plotted value is a real measured figure on one shared true-to-scale axis.
To compare sizes is to compute the ratio
“How much bigger?” has a precise answer: the ratio. When you compare sizes of a 65 inch TV against a 55 inch one, the honest reply is 1.18× on diagonal but 1.40× on area; when you compare a 195 cm character with a 160 cm one, the ratio 1.22× says “a fifth taller” instantly. This page exists to make that ratio effortless: two named objects, one dimension each, one exact multiple — the whole compare sizes answer.
The compare sizes tool opens with two example boxes, 180 versus 130, drawn to scale with the ratio 1.38× printed beneath. Rename them to anything — two suitcases, two shelves, two action figures — and enter each size in centimeters, meters, inches or feet/inches. Each time you compare sizes, the panel reports both directions: A as a multiple of B, and B as a fraction of A — the complete answer in one line, because comparing sizes should always end in a number this clean.
Ratios also protect you from marketing: “50% more” claims usually mean one specific dimension, not volume, not area, not the one you care about. Run the real numbers here and you compare sizes on the dimension that actually matters to your decision, and a one-off compare size check against a preset works the same way.
How to compare sizes in three moves
Name, enter, read — a complete size comparison in fifteen seconds.
1Name your two objects
Replace the sample labels with whatever you are comparing — boxes, screens, shelves, pets — so the exported image explains itself.
2Enter one size each
Any unit parses in either field. Keep it one dimension (both lengths, or both widths) so the ratio you read is the ratio you meant when you set out to compare sizes.
3Read the ratio panel
The exact multiple appears with both silhouettes on a shared scale — compare sizes numerically and visually in the same glance, then export or share.
Small tool, strict math
Ratio both ways
The compare sizes panel states the larger as a multiple of the smaller (1.38×) and the smaller as a share (72%) — two framings, both exact.
One scale, always
The two objects share the same axis like every tool on this site, so when you compare sizes visually the picture cannot exaggerate.
Share-ready output
PNG export and the scene-encoding share link mean your size comparison lands in the chat already proven, with names and numbers attached.
Ratios worth knowing before you compare sizes
Pre-computed multiples for classic pairings — instant ammunition for size debates.
| Pair | Values | Ratio |
|---|---|---|
| 65″ vs 55″ TV (area) | 11,643 vs 8,342 cm² | 1.40× |
| 65″ vs 55″ TV (diagonal) | 165.1 vs 139.7 cm | 1.18× |
| A380 vs semi-truck (length) | 72.6 vs 16 m | 4.54× |
| Giraffe vs man (height) | 500 vs 175 cm | 2.86× |
| Door vs child (height) | 200 vs 122 cm | 1.64× |
| Basketball hoop vs man | 305 vs 175 cm | 1.74× |
| School bus vs man (length) | 1140 vs 175 cm | 6.51× |
Note how the TV row changes with dimension: 1.18× on diagonal becomes 1.40× on area — the reason a proper effort to compare sizes always names its dimension.
Same dimension, or the ratio lies
The single rule of a valid compare sizes check: both numbers must measure the same dimension in the same basis. Length against length, area against area, shoulder height against shoulder height. The moment you mix — length versus height, diagonal versus area — the ratio is still arithmetic but no longer means anything, which is how “50% bigger” claims confuse buyers every day — run the compare sizes check here and the trick loses its power.
When your objects differ in kind, pick the dimension they share meaningfully: a person and a snake share length (the snake wins spectacularly), a person and a horse share shoulder height, two screens share area. Once the shared dimension is chosen, the ratio this page prints is defensible in any argument.
compare sizes — FAQ
What exactly does the ratio mean?
It is the larger size divided by the smaller — 180 versus 130 gives 1.38×, meaning the larger object is 38% bigger on the dimension you entered; the compare sizes math stays that simple.
Can I use it for area or volume?
For area or volume, yes in principle — enter the two areas as your values. Just remember the ratio then describes area, not length; the drawing will treat the numbers as one dimension.
Which units can I enter?
Centimeters, meters, inches and feet/inches, mixed freely between the two objects; the comparison normalizes both before dividing.
Does it work for tiny objects?
Yes — the scale engine adapts from millimeters to tens of meters, so you can compare sizes of rings, models or parts as easily as furniture.
Is the exported image free to use?
Yes — no watermark, no branding overlay. Use whatever you create when you compare sizes in chats, documentation, listings or presentations.