Fahrenheit, Miles, and Pounds: Making Sense of US Units, Dates, and Addresses
By Muntasir Minhaz • Published Aug 24, 2026
The US uses Fahrenheit for temperature, miles for distance, pounds for weight, and the month-day-year date format, all different from most of the world's metric and day-month-year systems.
🌡️ Water freezes at 32°F and boils at 212°F, room temperature feels comfortable around 68-72°F.
1 mile is about 1.6 kilometers, 1 pound is about 0.45 kilograms.
US dates are written month/day/year, so 3/5/2026 means March 5, not May 3.
🏠 US addresses list the street address first, then city, state abbreviation, and ZIP code.
Temperature: Fahrenheit, not Celsius
The US measures temperature in Fahrenheit. Water freezes at 32°F and boils at 212°F, compared with 0°C and 100°C. A fast estimate: subtract 32, then divide by 2, for a rough Celsius value, or use the exact formula, C = (F - 32) / 1.8, when you need precision.
Weather apps and forecasts default to Fahrenheit on US phones, even if your phone's language is set to your home country. Switch your weather app's unit setting if you want a Celsius reading, or use the quick formula until Fahrenheit feels normal.
| Fahrenheit | What it feels like | Approx. Celsius |
|---|---|---|
| 32°F | Freezing, ice on the ground | 0°C |
| 50°F | Cool jacket weather | 10°C |
| 68-72°F | Comfortable indoor room temperature | 20-22°C |
| 86°F | Hot summer day | 30°C |
| 98.6°F | Normal human body temperature | 37°C |
Distance and speed: miles, not kilometers
Road signs, speed limits, and everyday distances in the US use miles. One mile is about 1.6 kilometers, so a 60 mph speed limit is close to 97 km/h. Walking directions in campus and transit apps often show distance in miles too, a ten-minute walk works out to roughly half a mile, useful when you decide whether to walk or take transit to class.
Weight: pounds, not kilograms
Body weight, food packaging, and luggage limits are usually listed in pounds. One pound is about 0.45 kilograms, so a 150 lb person weighs about 68 kg.
This matters for your flight to the US, since airlines list checked bag limits in pounds on domestic routes and sometimes in kilograms on international routes, so check your specific ticket. It also matters at the grocery store, where meat and produce are priced and sold by the pound.
Dates: month, day, year
The US writes dates as month/day/year. 3/5/2026 means March 5, 2026, not May 3. This shows up on forms, receipts, and some university deadlines, so double-check any date you copy from a US document into your own calendar.
When a form has a free-text date field, write the month by name, "March 5, 2026", to avoid confusion. Forms with separate month, day, and year fields remove this risk.
Addresses: street first, ZIP last
A standard US mailing address reads name, then street number and name, then city, state abbreviation, and ZIP code, usually across two or three lines:
Line 1: your name
Line 2: apartment or unit number, then street number and street name
Line 3: city, two-letter state abbreviation, and five-digit ZIP code
States use fixed two-letter abbreviations, CA for California, NY for New York, TX for Texas. Apartment numbers usually go after the street address on the same line, written as "Apt 4B" or "#4B". Get your exact format right on forms and packages, mail sorting depends on the state abbreviation and ZIP code matching.
Clothing and shoe sizes
US clothing and shoe sizes do not match the numbering you may be used to, and sizing varies by brand rather than following one fixed national standard. Check the size chart on every US retailer's site before you order online, rather than assuming your usual size carries over directly.
Other everyday units you will see
Fuel is sold by the gallon, not the liter, one gallon is about 3.8 liters.
Height is given in feet and inches, one foot equals 12 inches, about 30.5 centimeters.
Paper size is Letter (8.5 x 11 inches), not A4, so documents formatted for A4 sometimes print with different margins.
Time: the 12-hour clock and multiple time zones
The US commonly writes time on the 12-hour clock with AM and PM, rather than the 24-hour clock used in much of the world. 2:00 PM means 14:00, and 12:00 AM means midnight, a common point of confusion since 12 PM is noon and 12 AM is midnight rather than the other way around.
The mainland US spans four main time zones, Eastern, Central, Mountain, and Pacific, each an hour apart. Check your specific campus time zone, and double-check the time zone on any virtual meeting or deadline that a professor or office schedules, since a 5 PM deadline means 5 PM in that office's local zone, not yours.
A full address written out
Put together, a US mailing address looks like this on an envelope or online form:
Jane Student
Apt 4B, 123 College Avenue
Springfield, IL 62704
Some online forms split this into separate fields for street address, apartment or unit, city, state, and ZIP code, which removes the guesswork. When a form gives you one open text box instead, follow the line order above.
Dressing for the weather once you know the number
Once you can read a Fahrenheit forecast, dress by the numbers rather than by habit from home. Below 40°F usually calls for a real winter coat, 40-60°F suits a jacket, 60-75°F is light layers, and above 80°F is short sleeves for most people. Check the daily high and low separately, campus mornings can start far colder than the afternoon high suggests.