Feet, Inches, Pounds, and Miles: Surviving American Units
A learner at a US driver's license office was asked for his height. He said, "One hundred seventy-five centimeters." The clerk smiled and asked, "Could you give that to me in feet?" He froze. Most of the world uses metric, but in the United States, units like feet, pounds, miles, and gallons run everyday life. Knowing how to talk about them in natural English is part of surviving daily conversation.
Why This Matters
Whether you live in the US, watch American shows, or read product listings online, US customary units appear constantly. Apartments are measured in square feet, gym weights in pounds, road signs in miles, milk in gallons, and the weather report in degrees Fahrenheit. The vocabulary is fixed, but the way numbers attach to these units has small twists — plurals disappear in certain positions, and casual short forms (like "five ten" for 5'10") are everywhere. Once you know the patterns, you can speak about distance, size, and weight without translating in your head.
The Pattern
Height is given in feet and inches together. The figure 5'10" is read "five ten" (very casual) or "five foot ten" (more standard). Notice foot, not feet, when followed by inches.
Weight uses pounds (often abbreviated lbs). For body weight, "one fifty" or "a hundred and fifty pounds" both work. For packages, "a five-pound bag" — when units come before a noun and act like an adjective, drop the -s.
Distance uses miles. "Ten miles north," "a half-mile walk," "about a mile away." A mile is roughly 1.6 kilometers.
Volume for liquids uses gallons, quarts, pints, cups, and fluid ounces. A coffee comes in 16-ounce cups; milk comes in gallons or half-gallons.
Temperature in the US is in Fahrenheit, written °F. Normal weather sits between 30°F (cold) and 90°F (hot). Body temperature is 98.6°F.
A few quick examples:
- He's six foot two, around 190 pounds.
- The apartment is 900 square feet.
- It's a two-hour drive, about 120 miles.
- It hit 95 degrees today.
Wrong / Natural / Why
| Wrong | Natural | Why |
|---|---|---|
| I am one seventy-five tall. | I'm five foot nine. | American conversational height uses feet and inches, not centimeters. |
| He is five feet ten. | He is five foot ten. | When inches follow, foot (singular form) is used. |
| A five-pounds bag of rice | A five-pound bag of rice | Compound modifiers drop the plural -s before a noun. |
| The store is ten mile away. | The store is ten miles away. | When miles is the main noun, keep the plural -s. |
| It is 30 degree today. | It's 30 degrees today. | Degrees takes the plural -s with any number except one. |
| One gallon of milks | A gallon of milk | Milk is uncountable and stays singular. |
| A 16-ounces coffee | A 16-ounce coffee | Adjective form before a noun drops the -s. |
| He weighs one fifty pounds. | He weighs a hundred and fifty pounds. | In one fifty (casual short form), pounds is usually omitted. |
Common Situations
At the doctor's office. "What's your height and weight?" "I'm five seven, around one forty." (5'7" and roughly 140 lbs.) The doctor will recognize these short forms instantly.
Driving directions. "Go about three miles north on the main road. The exit is in about a mile and a half." Notice how mile combines with a half: "a mile and a half" or "one and a half miles."
Apartment hunting. "It's a 700-square-foot one-bedroom on the third floor." When square feet becomes an adjective before apartment, drop the -s: a 700-square-foot apartment.
Grocery store. "I need a gallon of milk, a pound of ground beef, and a 12-ounce bag of coffee." Liquids in gallons, meat by the pound, packaged goods in ounces.
Gym. "I can bench press one thirty-five." Lifters often drop pounds because the weight plates are standard. "One thirty-five" means 135 lbs.
Weather check. "It's gonna be in the high 80s today, with humidity around 70 percent." Temperatures are often grouped as "the 70s," "the 80s," "the 90s" rather than exact numbers.
Road trip. "We've got about 200 miles to go — that's a three-hour drive if traffic stays light." Drive time and distance go together in American travel talk.
Common Mistakes
- Saying feet when foot is needed: "five foot ten," not "five feet ten."
- Forgetting to drop the -s in compound modifiers: a five-pound bag, a ten-mile race, a 900-square-foot apartment.
- Mixing up pounds (weight) and pound (currency in the UK). They are the same word but different units.
- Using metric units in casual US conversation without converting — most Americans cannot picture 175 cm or 65 kg quickly.
- Saying centigrade in the US. American weather is always Fahrenheit unless explicitly noted.
- Forgetting that a gallon is much larger in the US (about 3.8 liters) than in the UK (about 4.5 liters).
- Reading 5'10" letter by letter ("five apostrophe ten quote") instead of "five ten" or "five foot ten."
Quick Metric Cheat-Sheet
If you need a fast mental conversion:
- 1 mile ≈ 1.6 km
- 1 foot ≈ 30 cm
- 1 inch ≈ 2.5 cm
- 1 pound ≈ 0.45 kg (so 100 lbs ≈ 45 kg)
- 1 gallon ≈ 3.8 liters (US) or 4.5 liters (UK)
- °F to °C: subtract 32, then halve (a rough estimate). So 90°F is around 32°C.
Mini Practice
Rewrite each sentence in natural everyday English.
- He is one hundred eighty centimeters tall and weighs eighty kilograms.
- The package weighs 5 kilograms.
- The temperature outside is 35 degrees Celsius.
- The store is 5 kilometers away.
- I bought one liter of milk and 500 grams of cheese.
Summary
In American English, height pairs feet and inches ("five foot ten"), weight uses pounds, distance uses miles, liquids come in gallons and ounces, and weather is in Fahrenheit. Watch for the small grammar twist where plural -s disappears in compound modifiers, and learn a few rough metric conversions so the numbers land instantly. Then ordering coffee, renting an apartment, or chatting about the weather all stop sounding intimidating.
Want to practice numbers, quantifiers, and units in real test sentences? Start practicing on ExamRift.