How an entered or peg-derived rate turns one currency into another
An exchange-rate direction matters: 280 PKR per USD is not 280 USD per PKR. This tool asks for destination units per one source unit, then multiplies your amount. For the Saudi riyal, UAE dirham and Qatari riyal, which their central banks peg to the US dollar, it can also derive the rupee rate from a US-dollar quote. An optional button can fill in a daily mid-market reference rate, labeled with its update time, which you can replace with your provider's quote. It does not quote a transfer provider or include its fees.
The unit written after a rate tells you which way to multiply. If 1 USD corresponds to 280 PKR in a rate you obtained, 100 USD corresponds to 100 × 280 = 28,000 PKR before any service charges. Three Gulf currencies are pegged to the US dollar: 3.75 Saudi riyals, 3.6725 UAE dirhams and 3.64 Qatari riyals per dollar. So a riyal's rupee rate is the dollar's rupee rate divided by 3.75. The Kuwaiti dinar is pegged to an undisclosed basket, the Chinese yuan is a managed float, and the rupee, pound, euro, Canadian and Australian dollars float, so those need a direct quote.
The direction of the entered exchange rate is visible beside both currencies, and the reciprocal check makes it easier to catch an inverted rate without suggesting a live market quote.
How amount, rate direction, rate source and pegs set the converted sum
The page never supplies a rate; it multiplies your amount by a rate you type or by one built from a US-dollar quote and a published peg. Which boxes matter depends on the rate source.
- Source and destination currencies
- Twelve currencies are listed, and the two choices must differ. The pair fixes the meaning of every rate box: with USD as source and PKR as destination, the rate is rupees per dollar. Swapping the currencies without changing the rate inverts its meaning, which the implied reverse rate in the facts helps reveal.
- Rate source
- My quote for this exact pair uses only the rate you type. The US-dollar option works only when SAR, AED or QAR is on one side; it applies the central-bank peg of 3.75, 3.6725 or 3.64 per dollar and needs at most one dollar quote from you. For a pair such as GBP to PKR it returns an error asking for a direct quote.
- Amount
- The sum in the source currency, zero or more. The result is amount × rate, so it scales directly: 100 USD at 280 is 28,000 PKR. No fee, spread or transfer limit is applied, so the figure is the value of the money before any charges a provider adds.
- Rate for the pair
- Destination units for one source unit, as quoted by your bank or exchange company. An inverted rate is the most common error: typing 0.00357 for USD to PKR turns 100 USD into 0.357 PKR, and the implied reverse rate of 280.11204482 exposes the mix-up. If your quote runs the other way, divide 1 by it first.
- US-dollar quote for the peg method
- Units of the non-pegged currency per one US dollar, such as rupees per dollar for SAR to PKR. With 280 PKR per USD, one riyal is 280 ÷ 3.75 = 74.66666667 PKR, so 1,000 SAR is 74,666.6667 PKR. When both sides are pegged, or one side is USD, this box is not used.
- Display precision
- Converted amounts show up to four decimals and rates up to eight, more than most banks pay out. Round the final figure to the currency's own smallest unit, and expect a provider's rate, spread and fees to move the amount by more than this rounding.
Steps
- Select different source and destination currencies, for example SAR and PKR.
- Choose your own quote for the pair, or a US-dollar quote with the official peg, then enter the amount and the rate in the direction shown.
- Calculate to see the converted amount, your rate and the reciprocal as a direction check. Verify fees and the actual provider quote before a transfer.
Reading tip: Read your quote aloud as 'destination currency per one source currency' before entering it. If the quote is phrased in the reverse direction, divide one by it first or switch the source and destination choices.
Money questions a rate you supply can answer
Check a remittance estimate
Apply a provider's stated directional rate to an intended transfer amount.
Plan a trip budget
Translate a source amount with a rate you have chosen for planning.
Catch an inverted rate
Use the currency labels and reciprocal to inspect rate direction.
Compare quoted rates
Rerun the same amount with two entered rates, then account for each provider's fees separately.
How the calculation works
- S
- Entered source-currency amount.
- r
- Visitor-entered or on-demand filled destination units for one source unit.
- D
- Mathematical destination amount before provider charges.
- 1/r
- Mathematical reciprocal of the same entered rate, not a transaction offer.
An on-demand daily reference rate is not a bank quote. The visitor can replace it with a provider rate before calculating.
What every part means
- S
- Entered source-currency amount.
- r
- Visitor-entered or on-demand filled destination units for one source unit.
- D
- Mathematical destination amount before provider charges.
- 1/r
- Mathematical reciprocal of the same entered rate, not a transaction offer.
Calculate it step by step
A rate's unit direction decides whether multiplication answers the desired conversion.
The entered source amount and rate are multiplied using decimal arithmetic.
The reciprocal is a mathematical check only, not a provider's reverse transaction rate.
The conversion is plain multiplication using a rate supplied by the visitor or explicitly filled from a daily mid-market reference feed. The on-demand feed shows its update time; it is not a bank quote or continuous live price. There is no bank integration or currency-minor-unit rounding policy. The calculator normally displays up to four decimals for amounts and eight for rates, retaining significant digits for tiny nonzero values; for a real transaction, use the provider's own currency rounding and fees.
See how Calculation Guide tests examples and handles calculation limits.
See it in practice
- Source currency
- USD · US dollar
- Destination currency
- PKR · Pakistani rupee
- Where does the rate come from?
- My quote for this exact pair
- Amount in source currency
- 100
- Destination currency units for 1 source unit
- 280
With USD → PKR, S = 100 USD and r = 280 PKR per USD: D = 100 × 280 = 28,000 PKR. The reciprocal is 1/280 ≈ 0.00357143 USD per PKR as a math check.
- FromUS dollar (USD)
- ToPakistani rupee (PKR)
Interpretation & limitations
How to read your result
The headline amount is in the destination currency selected. The rate is the entered directional rate, and the reciprocal helps spot accidentally inverted inputs. A converted number can change whenever the chosen rate changes, even if the entered source amount does not.
Where this estimate stops
Market rates move, and banks, remittance services and cards can apply spreads, fees, limits or different timing. A mathematically reversed rate does not account for those differences. This page does not imply a current, guaranteed or executable quote.
Frequently asked questions
01Are rates live on this page?
The optional button fetches a dated daily mid-market reference rate on demand. The calculator otherwise uses the rate you enter, which may differ from a bank or exchange provider's current quote.
02Can I enter a buy rate and get a sell quote?
The calculation uses exactly the rate you enter. Banks and providers may use different buy/sell rates and fees.
03Why is my bank amount different?
A bank may use another rate, charge a fee or round to the destination currency's transaction precision. This tool applies only your entered rate.
04What does 280 PKR per USD mean?
For each one USD, the stated rate gives 280 PKR before fees. USD is the source and PKR is the destination.
05Can the reciprocal be used for an actual return exchange?
Only as a mathematical illustration. A provider may offer a different rate in the opposite direction.
06Where can I check a rupee rate?
The State Bank of Pakistan publishes a daily weighted-average customer exchange rate for USD, SAR, AED, GBP, EUR, CAD, AUD, CNY and other currencies. It is for information only; your bank or exchange company quotes its own buying and selling rates.
07Why does SAR to AED not ask for any rate?
Both currencies are pegged to the US dollar, so the peg method derives the cross rate from the two pegs alone: 3.6725 ÷ 3.75 = 0.97933333 AED per SAR, which makes 100 SAR equal to 97.9333 AED. The same holds for SAR, AED or QAR against USD. Exchange counters still quote their own buying and selling rates around that figure.
Sources & references
- State Bank of Pakistan: weighted average customer exchange rates (daily PDF, 30 September 2026) ↗
- Saudi Central Bank: commitment to the 3.75 riyal per dollar rate ↗
- Central Bank of the UAE: Annual Report 2014 (3.6725 dirham peg) ↗
- Qatar Central Bank: instructions to banks (3.64 riyal per dollar) ↗
- Central Bank of Kuwait: exchange rate policy ↗