CARTON · Robux · USD/JPY

Simulated signal

Latest calculated index

Real currency Japanese yen

Fictional currency Robux

1 JPY

Robux

1 Robux JPY 1.5580

Unofficial entertainment index. It is not a tradable exchange rate.

Cardboard Index · JPY / Robux

How much is one Japanese yen worth in Robux?

Based on data updated on September 4, 2026, one Japanese yen is worth approximately 0.6419 Robux.

The calculation uses 500 Robux, its reference price in US dollars, and the exchange rate published by Federal Reserve · FRED.

View official price

Historical series

The index in motion.

Choose a range: 1M, 3M and 1Y show daily values; 3Y summarizes each month.

The history contains 247 observations. The index moved from 0.6785 Robux to 0.6419 Robux per JPY, with a low of 0.6121 and a high of 0.7012.

At a glance

Previous value 0.6264 Robux per JPY

7-day change +2.47 % Federal Reserve · FRED series

30-day change +1.95 % Federal Reserve · FRED series

Period low 0.6121 Robux per JPY

Period high 0.7012 Robux per JPY

How it works

One dollar price.
The Federal Reserve · FRED exchange rate.

We convert US$4.99 to JPY using Federal Reserve · FRED, then divide 500 Robux by the result.

Robux per JPY

500 Robux US$ 4.99 × JPY 156.1100

current index · 0.6419

500 Robux ÷ (US$ 4.99 × 156.1100 JPY/US$) = 0.6419 Robux per JPY.

SOURCE

Fictional supply: 500 Robux
Reference product: Standard web package · 500 Robux
US web price: US$ 4.99
Federal Reserve · FRED · JPY per US$1: 156.1100
Price in JPY: JPY 779

Limitations

The package price is a reference and may change by region, platform, and tax.

The Federal Reserve · FRED reference exchange rate may not match the price available to retail customers.

The package excludes subscriptions, promotions, and gift cards. The result is an entertainment index, not a resale price or financial valuation.

Traceability

Two inputs, in plain sight.

In this historical snapshot, the package price remains fixed. Only the official Federal Reserve · FRED exchange-rate series changes over time.

Sources for the latest calculation
Source / input	Value	Date	Use
Roblox · Robux Standard US web package · 500 Robux	US$ 4.99	Jul 24, 2026	IncludedFixed price
Board of Governors of the Federal Reserve System Japanese Yen to U.S. Dollar · DEXJPUS	JPY 156.1100 / US$ 1	Sep 04, 2026	IncludedHistory · 3 years

About the project

Real data.
Fake money.

cartonindex turns an absurd question into a serious exercise in methodology, traceability and visualization.

Both language versions use the same underlying data series, so changing language does not change the calculation.