スケールモデル変換計算機
任意のスケール比率について、実際のサイズとスケールモデルサイズ間で変換します。名前付きスケール（HO、N、1:35、1:48、1:72…）を選択するか、カスタム比率を入力し、2つの異なるスケール間でサイズを直接変換します。
入力
何を計算しようとしていますか？
既にお持ちの寸法 — 実際の世界の長さまたは既存のモデルのサイズ。
スケール比率1:N — 名前付きのホビー/建築スケールを選択するか、カスタムを使用してください。
出力
| Metric | Value |
|---|---|
| No data yet | |
このツールを使う他の方法
REST API
curl -X POST https://api.iotools.cloud/v1/tool/scale-model-conversion-calculator \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"mode": "toModel",
"value": "40",
"valueUnit": "in",
"scale": "24",
"outputUnit": "in"
}'ご自身のアカウントのキーに差し替えてください。ツールのフィールドがそのままリクエストボディになります——ラッパーはありません。
AIエージェントに依頼する
Use the IOTools `scale-model-conversion-calculator` tool (Scale Model Conversion Calculator) on this input:
YOUR_INPUT_HEREIOTools MCPサーバーに接続された任意のエージェントにこれを貼り付け、入力内容を追加してください。
埋め込みウィジェット
<iframe
src="https://iotools.cloud/embed/scale-model-conversion-calculator/"
width="100%" height="520" frameborder="0" scrolling="no" loading="lazy"
title="スケールモデル変換計算機 — iotools.cloud"
sandbox="allow-scripts allow-forms allow-same-origin allow-downloads allow-popups allow-popups-to-escape-sandbox"
allow="clipboard-write"
style="width:100%;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden"></iframe>
<script src="https://iotools.cloud/embed.js" async></script>ご自身のページに貼り付けるだけ——無料、キー不要、リンクを掲載するだけです。
| API/MCP 1回あたりの費用 | 5クレジットから |
|---|---|
| クレジットが足りませんか? | 料金を見る |
次の方法でも利用可能
ガイド
The Scale Model Conversion Calculator converts a dimension between real-world size and scale-model size for any scale ratio (1:N) — or, if you already have a part sized for one scale, works out the equivalent size at a different scale entirely.
How to use it
Real-world size → Model size (default):
- Enter the real-world dimension and its unit (mm, cm, m, in, ft or yd).
- Pick a scale — choose a named preset (HO 1:87, 1:35 military, 1:48 aircraft, 1:24 diecast, and more) or select "Custom ratio…" and type the
Nin1:Nyourself. - Read the model size in whichever unit you want it shown in.
Model size → Real-world size: switch "Direction" to this mode, enter the model's measured size and the scale it was built at, and read the real-world size it represents.
Convert between two scales: enter a size you already have (a kit part, a 3D-print, a scratch-built piece), the scale it was made for, and the scale you want the equivalent size for — the calculator round-trips it through the real-world size for you.
Why a preset library instead of a bare ratio field?
Most modeling scales are referred to by name more often than by their raw ratio — a railway modeler thinks "HO" or "N scale," not "1:87" or "1:160." This tool's scale picker lists the common named scales across model railways (HO, OO, N, Z, G), military/armor (1:35, 1:72), aircraft (1:32, 1:48, 1:72, 1:144), diecast cars (1:18, 1:24, 1:43, 1:64), ships (1:700) and common architectural fractional scales (1/4"=1'-0", 1/8"=1'-0") — so you can pick the scale you actually work in without having to already know its ratio. A "Custom ratio…" option covers anything not on the list.
What does "1:N" mean?
A scale of 1:N means one unit of length on the model equals N of the same unit in reality — a 1:87 (HO) model that measures 10 mm represents 870 mm (0.87 m) in real life. The ratio holds for any unit, which is why scales are stated this way rather than tied to a specific unit pair.
How does scale-to-scale conversion work?
The size you enter is first converted to its real-world equivalent using the "from" scale, then that real-world size is divided by the "to" scale's ratio — the same two steps you'd do by hand, just without re-typing the intermediate real-world number or converting units yourself.
Is my data private?
Yes. Every calculation runs entirely in your browser — nothing is uploaded to a server.
Common uses
Sizing a 3D-printed or scratch-built part to match an existing kit's scale, checking whether a diecast car and a display case are compatible scales, converting a blueprint or architectural drawing dimension into a dollhouse or display-model size, or working out how big a real object was from a measured model.
Working with real-world map distances instead of models? Use the Map Scale Calculator. Scaling ingredient quantities rather than physical dimensions? Try the Recipe Scale Calculator.