Sri Lankan rupee to US dollars, 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.
Rupees to US dollars. Accurate to within 1.3% at today's rate, which means it reads about 1.3% 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.
| Sri Lankan rupee | Rule of thumb | Actual |
|---|---|---|
| Rs100 | $0.294 | $0.298 |
| Rs200 | $0.588 | $0.596 |
| Rs500 | $1.47 | $1.49 |
| Rs1,000 | $2.94 | $2.98 |
| Rs2,000 | $5.88 | $5.96 |
| Rs5,000 | $14.71 | $14.9 |
| Rs10,000 | $29.41 | $29.8 |
| Rs20,000 | $58.82 | $59.6 |
| Rs50,000 | $147.1 | $149 |
Going the other way
Useful at the ATM, where you choose an amount in US dollars and want to know what lands in your hand.
| US dollars | Sri Lankan rupee |
|---|---|
| $1 | Rs335.6 |
| $5 | Rs1,678 |
| $10 | Rs3,356 |
| $20 | Rs6,712 |
| $50 | Rs16,779 |
| $100 | Rs33,559 |
What catches people out in Sri Lanka
The Sri Lankan rupee has moved a long way in recent years, so any rule you memorised on a previous trip is probably wrong. Re-check it on arrival.
When this rule stops working
Rules of thumb rot quietly. This one holds while the rate stays roughly between 335 and 345 LKR to the dollar. 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 USD; LKR and 150+ other currencies unlock for $4.99, once.
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