To convert Hong Kong dollars (HKD) to Australian dollars (AUD), divide the HKD amount by the quoted number of Hong Kong dollars per Australian dollar. Using the Reserve Bank of Australia’s (RBA) observation of 5.4744 HKD per AUD on 30 September 2026, HKD 100 works out to about AUD 18.27. That is a dated reference calculation, not a guaranteed customer exchange rate.
How to convert HKD to AUD
First check the direction of the quote. The RBA reports its exchange-rate series in units of foreign currency per Australian dollar, so its Hong Kong dollar figure means how many HKD equal one AUD. To convert HKD into AUD, divide by that figure:
HKD amount ÷ HKD per AUD = AUD amount
For example, the RBA displayed 5.4744 HKD per AUD for 30 September 2026. The calculation for HKD 100 is 100 ÷ 5.4744 = approximately AUD 18.27. The RBA publishes its rates daily except on public and bank holidays observed in New South Wales, so the latest displayed observation can change. Check the RBA exchange-rate series for the date attached to the figure.
Why published HKD-to-AUD figures differ
There is no single figure that answers every exchange-rate question. Official sources publish rates for different purposes, periods and quote types. Compare the date, direction, and whether a number is a reference rate, period average, buying rate or selling rate.
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| Source and figure | What it represents | How to use it |
|---|---|---|
| RBA: 5.4744 HKD per AUD, observed 30 September 2026 | Daily exchange-rate observation; the RBA quotes foreign-currency units per AUD. | Indicative conversion and historical context. Its inverse is about 0.1827 AUD per HKD; HKD 100 is about AUD 18.27 using this observation. |
| Hong Kong Inland Revenue Department (IRD): 5.4195 HKD per AUD, September 2026 | Monthly average in the 2026/27 profits-tax exchange-rate table. | Tax-purpose calculation, not a live retail offer. See the IRD profits-tax average exchange rates. |
| Hong Kong IRD: 5.5067 HKD per AUD buying rate and 5.6146 HKD per AUD selling rate, September 2026 | Figures in the 2026/27 salaries-tax table. The IRD says the buying rate converts foreign-currency chargeable income into HKD; the selling rate applies to deductible expenses paid in foreign currency. | Tax-accounting purposes, not a consumer exchange quote. See the IRD salaries-tax average exchange rates. |
The HKMA identifies its AUD field as HKD per unit of foreign currency and documents its effective-rate methodology. DATA.GOV.HK identifies the Hong Kong Monetary Authority (HKMA) as provider of the daily dataset. These are useful details when interpreting the series, but they do not make a published reference rate a guaranteed transaction rate. Read the HKMA period-average field definitions and methodology; view the daily dataset catalog entry.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What rate will you actually receive?
A central-bank or government rate is useful for estimating a conversion or understanding historical movement. It does not tell you what a bank, card network, cash exchange or remittance provider will deliver for a particular transaction. The RBA explicitly warns: “These data should not be relied upon for any regulatory or commercial purposes.”
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A provider’s final amount can reflect its offered exchange rate, spread, fees and transaction details. Before exchanging or sending money, check the final AUD amount you will receive for the same HKD amount, after charges—not just the headline rate. Also verify the delivery method, expected time and any cash-pickup or recipient eligibility conditions that apply.
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Quick checks before using an HKD-to-AUD rate
- Confirm quote direction: HKD per AUD means divide HKD by the quoted figure.
- Keep the date and source attached: “latest” changes as new observations appear.
- Use the right kind of rate: a tax average is not a travel, card or remittance offer.
- For a transaction, compare net proceeds: assess the AUD delivered after fees for the same amount of HKD.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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