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Hungarian forint to Swiss francs, 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.

THE RULE
drop two zeros, then divide by 3.9

Forint to Swiss francs. Accurate to within 0.1% at today's rate, which means it reads about 0.1% dearer than the real price.

1 CHF = 390.25 HUF · rate as of 2026-08-04

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.

Hungarian forint Rule of thumbActual
Ft100 CHF 0.256 CHF 0.256
Ft200 CHF 0.513 CHF 0.512
Ft500 CHF 1.28 CHF 1.28
Ft1,000 CHF 2.56 CHF 2.56
Ft2,000 CHF 5.13 CHF 5.12
Ft5,000 CHF 12.82 CHF 12.81
Ft10,000 CHF 25.64 CHF 25.62
Ft20,000 CHF 51.28 CHF 51.25
Ft50,000 CHF 128.2 CHF 128.1

Going the other way

Useful at the ATM, where you choose an amount in Swiss francs and want to know what lands in your hand.

Swiss francs Hungarian forint
CHF 1Ft390.2
CHF 5Ft1,951
CHF 10Ft3,902
CHF 20Ft7,805
CHF 50Ft19,512
CHF 100Ft39,025

What catches people out in Hungary

Forint prices run to five figures for ordinary things, which makes it easy to misread a restaurant bill by a factor of ten.

When this rule stops working

Rules of thumb rot quietly. This one holds while the rate stays roughly between 385 and 395 HUF to the franc. 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 CHF; HUF and 150+ other currencies unlock for $4.99, once.

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