South African rand 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.
Rand to Swiss francs. Accurate to within 2.0% at today's rate, which means it reads about 2.0% dearer than the real price.
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.
| South African rand | Rule of thumb | Actual |
|---|---|---|
| R10 | CHF 0.5 | CHF 0.49 |
| R20 | CHF 1 | CHF 0.98 |
| R50 | CHF 2.5 | CHF 2.45 |
| R100 | CHF 5 | CHF 4.9 |
| R200 | CHF 10 | CHF 9.8 |
| R500 | CHF 25 | CHF 24.51 |
| R1,000 | CHF 50 | CHF 49.02 |
| R2,000 | CHF 100 | CHF 98.05 |
| R5,000 | CHF 250 | CHF 245.1 |
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 | South African rand |
|---|---|
| CHF 1 | R20.4 |
| CHF 5 | R102 |
| CHF 10 | R204 |
| CHF 20 | R408 |
| CHF 50 | R1,020 |
| CHF 100 | R2,040 |
What catches people out in South Africa
The rand is one of the more volatile currencies on this list, so the rule is worth re-checking rather than remembering from a previous trip.
When this rule stops working
Rules of thumb rot quietly. This one holds while the rate stays roughly between 19.5 and 20.5 ZAR 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; ZAR and 150+ other currencies unlock for $4.99, once.
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