Japanese yen to dirhams, in your head
One rule, the error band that comes with it, and the point at which it stops being the right rule. Updated from the live rate feed.
Yen to dirhams. Accurate to within 0.5% at today's rate, which means it reads about 0.5% cheaper than the real price — round up, not down.
The ladder
The middle column is what the rule gives you standing in a market. The right column is the real number, so you can see exactly where the shortcut costs you.
| Japanese yen | Rule of thumb | Actual |
|---|---|---|
| ¥20 | AED 0.465 | AED 0.467 |
| ¥50 | AED 1.16 | AED 1.17 |
| ¥100 | AED 2.33 | AED 2.34 |
| ¥200 | AED 4.65 | AED 4.67 |
| ¥500 | AED 11.63 | AED 11.68 |
| ¥1,000 | AED 23.26 | AED 23.37 |
| ¥2,000 | AED 46.51 | AED 46.73 |
| ¥5,000 | AED 116.3 | AED 116.8 |
| ¥10,000 | AED 232.6 | AED 233.7 |
Going the other way
Useful at the ATM, where you choose an amount in dirhams and want to know what lands in your hand.
| Dirhams | Japanese yen |
|---|---|
| AED 1 | ¥42.8 |
| AED 5 | ¥214 |
| AED 10 | ¥428 |
| AED 20 | ¥855.9 |
| AED 50 | ¥2,140 |
| AED 100 | ¥4,280 |
What catches people out in Japan
Yen has no subunit in practice, so every price is a whole number and the arithmetic is cleaner than it looks. Cash is still expected in small restaurants and at shrines.
When this rule stops working
Rules of thumb rot quietly. This one holds while the rate stays roughly between 42.5 and 43.5 JPY to the dirham. Outside that band a different divisor becomes the better one to memorise. We regenerate this page from the live rate feed, so the date above tells you how fresh the number is — if you are reading this a long way after August 2026, check it before you rely on it.
Or skip the arithmetic entirely
RoamRate does this conversion with no signal, in one hand, on a number pad built for a thumb. Free for AED; JPY and 150+ other currencies unlock for $4.99, once.
Download on the App Store