Units & Currency

Recognizes a copy whose whole text is a number with a unit, or an amount of money, tags it, and converts it.

Units. Length (mm cm m km in ft yd mi), mass (mg g kg t oz lb st), temperature (°C °F K), volume (ml cl l, tsp tbsp fl oz cup pt qt gal), speed (km/h mph m/s kn), area (cm² m² ha km² in² ft² yd² acre mi²), data (B KB MB GB TB and KiB MiB GiB TiB) and time (ms s min h d wk, also 1h 30m). The preview lists the sensible conversions: the other system first (metric to imperial and back), then the close neighbors. Convert unit pastes the main one; Convert to all units pastes the list, one per line.

Currency. 120 USD, $120, €50, ₺1.250,50, 50 EUR, 100 TL, USD 120, 1.250,50 ₺. Convert to TRY / EUR / USD / GBP pastes the converted amount; Convert to all currencies pastes one line per currency. A text setting, More currencies, adds other ISO codes (for example JPY, CHF) to the list and to the preview.

Example

Copy 72°F: the tag Unit appears, the preview shows 22.22 °C and 295.37 K, and Convert unit pastes 22.22 °C. Copy 110 USD, choose Convert to EUR: it pastes €100.00 (at a rate of 1.10), and a notice says which day's rate was used.

Permissions

• network, only to www.ecb.europa.eu. The rates come from the European Central Bank's daily reference rates (https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml). The request carries nothing about the copied text, and only happens when you run a currency action, never while you copy or preview.

No tools, no other permissions.

How rates work

• The ECB publishes the rates once on working days (about 16:00 Central European Time), for about thirty currencies against the euro. Other pairs are worked out through the euro. These are reference rates, not what a bank or card charges.
• The rates are kept on this Mac (yab.storage) with their date, and reused for six hours. After that the next currency action fetches them again.
• If the ECB can't be reached, the last saved rates are used and the notice says Offline. Using the rate of <date>. With no saved rates there is nothing to convert and you are told so.
• The preview never uses the network: it shows conversions from the saved rates and their date, or says that rates load the first time you convert.
• Source and terms: ECB euro foreign exchange reference rates, free to reuse with the source named (https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html). Unit factors are the exact definitions of the international yard and pound (1959), the US customary volumes, the knot (1852 m/h) and SI/IEC prefixes; nothing is copied from a third-party table.

Notes and limits

• Only a whole text is recognized: 5 km yes, it is 5 km away no.
• Numbers: 1,234.5, 1.234,5, 1 234,5, 1'234.5 and 3,5 are all read. A lone separator followed by exactly three digits (1,234) is a thousands separator unless it is your language's decimal separator (so 1.234 is 1234 in Turkish and 1.234 in English).
• KB, MB… count 1000 bytes (as macOS does); KiB, MiB… count 1024. Mb and Gb (bits) are not recognized.
• oz is a mass; volume is fl oz. t is the metric tonne. pt, qt, gal, cup, tbsp and tsp are US measures. A bare C or F (capital) is a temperature; lowercase is not.
• $ means US dollars and ¥ Japanese yen; use the code (CAD, CNY) for others. Only currencies the ECB publishes are supported.
• Temperatures below absolute zero, and numbers beyond 10^15, are not recognized.
• Months and years are not units (their length varies).