USD gold price vs TWD gold price:one formula that settles it — stop mixing up three quotes

Look at gold from Taiwan and you meet three numbers at once: the international quote of 4,124 USD an ounce, Bank of Taiwan's gold passbook at 4,3xx per gram, and the jeweller on the corner at 16,xxx per qian. All three are correct, and all three are the same gold — the difference is only the unit and which costs are included.

Most people lose not by getting the direction wrong but by getting the unit wrong once during conversion, or by paying a layer of premium they did not know existed. This article does one thing: it works through the conversion and the gaps between the dollar price, the TWD price and the dealer board, using today's real numbers. When you finish you should be able to judge in ten seconds whether a quote is expensive or reasonable.

Source: XAUAD live quote API (Swissquote) and public FX data, sampled 2026-10-21 (Taipei time). Gold and FX move every second; for order entry use the live quote page.

1. First, what each of the three prices actually is

Put the three numbers on one table and it becomes obvious that this is not a question of who is right — they are three different things.

In other words: the international spot price is the raw material price, the TWD price is raw material plus FX, and the dealer board is raw material plus FX plus distribution cost. The three will never be equal, and the gap moves with market conditions — that is exactly where the "premium" comes from.

2. The formula: only three constants to remember

Where the three constants come from: 1 ounce = 31.1035 grams (the international troy ounce, a fixed value); the Taiwanese 1 qian = 3.75 grams; 1 tael = 10 qian = 37.5 grams. None of these three numbers moves with the market — memorise them once and they last a lifetime.

Run through it with today's numbers

1. Dollar gold price 4,124.10 USD / oz
2. To the gram: 4,124.10 ÷ 31.1035 = 132.59 USD / g
3. Times the rate: 132.59 × 32.6264 = 4,326.02 TWD / g
4. To the qian: 4,326.02 × 3.75 = 16,222.56 TWD / qian
5. To the kilogram: 4,326.02 × 1,000 = 4,326,016 TWD (about 4.326 million)

So when a jeweller posts "16,800 per qian" you can judge immediately: 16,800 ÷ 16,222.56 = 1.036, a premium of about 3.6%. Whether that is reasonable or rich depends on whether you are buying a bar or jewellery — the next section covers it.

Reverse: from TWD back to dollars

The reverse direction is used just as often. You see Bank of Taiwan's passbook at "4,4xx per gram" and want the international price at that moment: dollar price = TWD / g ÷ rate × 31.1035. For example 4,326 ÷ 32.6264 × 31.1035 ≈ 4,124 USD, which matches the live quote — meaning that board carries no abnormal mark-up. For finer unit swaps use the gram / ounce / tael converter directly, or the full conversion table in how many grams is one tael of gold.

3. Where the premium comes from: why the jeweller is expensive

"Premium" = the price you pay ÷ the international converted price − 1. It is not a single fee but several costs stacked up:

• Import, freight and insurance: Taiwan produces no gold, so the metal is imported; air freight with security, insurance and customs clearance are all costs, usually 0.5%–2%.
• Casting and wastage: casting bars and fabricating jewellery involve gold loss, and the buyer absorbs it.
• Fabrication (jewellery only): design, the craftsman's labour, the brand — typically 300–1,500 TWD per qian, about 2%–10% in percentage terms.
• Rent and staff: the fixed cost of a physical shop, which ends up in the gap between the selling price and the buy-back price.
• Inventory risk: if gold falls after the shop has bought stock, the loss has to be recovered from the spread.

Note: premiums and weight deductions are common market ranges; actual terms depend on the dealer and the product; jewellery carries fabrication and design fees on top.

The column worth remembering is the last one, round-trip cost. The round-trip cost of jewellery is enough to eat an entire year of gold's gain — if gold rises 8% in a year and you buy jewellery and sell it back the following year, you will most likely still be down. Treat jewellery as consumption and a keepsake, not as an investment.

4. The exchange rate: the real variable in a TWD return

Gold is quoted in dollars but you live in TWD. That means your return is really two variables multiplied: the change in the dollar gold price × the change in USD/TWD. Most people watch only the first, and then wonder in a year of TWD strength why gold "is not going up".

Look at the first and second rows: gold did not move at all and your TWD assets fell 2.5%. Go one layer further: if the dollar gold price rises 5% while TWD appreciates 3%, your TWD return is only (1.05 × 0.97 − 1) = +1.85% — half the gain eaten by the currency. Conversely, dollar gold up 8% with TWD down 4.4% magnifies the TWD return to about +13%.

5. Four channels, and how far apart the costs are

Take 300,000 TWD held for one year and lay the costs out (excluding the move in the gold price):

Two things are easy to misjudge. First, the gold ETF's 1% management fee is deducted inside the fund — you never see a bill, but it comes out of NAV every single day. Second, whether the passbook's 1% spread is charged once each way or is already inside the board price differs from bank to bank, so read both the bid and the ask columns before buying instead of a single number. To model P&L at different sizes, the gold P&L calculator is the fastest route.

6. Which price to watch when: hours and update frequency

The three prices update on completely different rhythms, and getting that wrong makes you decide today on yesterday's price.

• International spot (XAU/USD): quoted 24 hours, from the Monday morning open to Saturday morning. 20:00–23:30 Taipei time is the London-New York overlap, with the best liquidity and the tightest spread.
• Bank of Taiwan gold passbook: board prices are published in bank business hours, roughly 09:00–15:30 at the counter and extendable into the evening online (per Bank of Taiwan's announcements). No update at the weekend, so Monday's board often jumps a long way in one go.
• Dealer board price: most shops update once when they open, and suspend quoting or add "subject to the shop" when gold moves sharply.

7. The five most common conversion errors

1. Treating an ounce as a tael. 1 ounce is 31.1 grams and 1 Taiwanese tael is 37.5 grams, a 20% gap. People compare the international price straight against a per-tael board and get every conclusion wrong.
2. Forgetting to multiply by the rate. Dividing dollars by 31.1035 alone gives USD per gram, not TWD. This is the most common error because the two numbers look so similar.
3. Comparing a jewellery board with the international price to get the premium. Jewellery includes fabrication, so of course it should cost more than a bar. Compare premiums like for like: same product, same weight.
4. Looking only at the buying price, never the buy-back. What decides profit or loss is the money you receive when you sell, not the money you pay when you buy. Before buying, ask one question: how is your buy-back priced, and what percentage is deducted for weight?
5. Comforting yourself with the dollar return. Dollar gold up 10% with TWD up 8% leaves you 1.2% in TWD. Get the currency wrong and the effort is wasted.

8. Allocation logic for Taiwanese investors

Treat gold as insurance rather than an engine and the percentage suggests itself. A common approach is 5%–10% of investable assets in gold, built in tranches through a passbook or an ETF, without trying to predict the top; if you genuinely want the physical comfort, buy bars with another 2%–3% and keep them in a safe deposit box. Even a 20% gold drawdown then stays within a tolerable impact on total assets.

If you intend to trade short-term with leverage, that is a completely different game: the cost changes from "premium" to "spread plus overnight financing", volatility is magnified, and one wrong call can wipe out ten winners. Read gold day trading: hours, spread and leverage first and get the cost straight before you go in.

9. FAQ

Q1. How do I convert the dollar gold price into a TWD gold price?
A. TWD gold price (TWD / g) = dollar gold price (USD / oz) ÷ 31.1035 × USD/TWD. With today's 4,124.10 and a rate of 32.6264 that is about 4,326 per gram and about 16,223 per qian (3.75 g). Ounces to grams is always ÷ 31.1035.

Q2. Why is the dealer board more expensive than the converted international price?
A. Because the board includes import freight and insurance, shop rent and staff, casting wastage, and for jewellery fabrication and design fees on top. Bars usually carry a 3%–8% premium; jewellery with fabrication can reach 10%–20%. That is distribution cost — but it also means part of your return is already spent the moment you buy.

Q3. How many grams is one qian of gold?
A. The Taiwanese qian is 3.75 grams, and one tael is 10 qian = 37.5 grams. One ounce is about 31.1035 grams, or about 8.294 qian. Before you trade, confirm whether the other side is quoting qian, grams or ounces; one wrong unit costs thousands.

Q4. Will my gold lose money when the TWD strengthens?
A. In TWD terms, yes. With the dollar price unchanged and USD/TWD moving from 32.63 to 31.80 (a 2.5% appreciation), the TWD gold price falls from 4,326 to 4,216 a gram. If you will eventually convert back into TWD to spend, you have to compute the return in TWD terms.

Q5. Which is cheapest: the passbook, a jeweller's bar or a gold ETF?
A. For small amounts with no storage, the ETF (such as 00635U) is cheapest; the passbook wins on convenience and buying in tranches, with a spread of about 1%; a jeweller's bar carries 3%–8% and suits large, long-term holdings where you want the metal itself. None of the three suits short-term trading.

Related tools

• Gram / ounce / tael converter — swaps Taiwanese and international units and prices per qian directly
• Gold P&L calculator — enter lots and entry/exit prices for net profit after spread
• Historical gold price lookup — backtest the daily range and the band
• Live gold session table — Taipei time against each session's open and close

Further reading: how many grams is one tael of gold? The full conversion table | gold day trading: hours, spread and leverage | Academy home

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