US unit converter: Fahrenheit, miles, pounds, gallons
Convert US units to metric instantly: temperature, distance, weight, liquids, speed and area, with ready-made everyday tables.
Temperature table: Fahrenheit to Celsius
| °F | °C | What it means |
|---|
| 0°F | -17.8°C | Bitter cold — icy roads |
| 32°F | 0°C | Freezing point |
| 50°F | 10°C | Cool — light jacket |
| 68°F | 20°C | Mild — room temperature |
| 77°F | 25°C | Warm |
| 86°F | 30°C | Hot |
| 98.6°F | 37°C | Normal body temperature |
| 100.4°F | 38°C | Fever |
| 104°F | 40°C | Very hot |
Units you meet every day
| Unit | Equals | Where you see it |
|---|
| 1 mile | 1.609 km | Road signs and odometers |
| 65 mph | ≈ 105 km/h | A common highway speed limit |
| 1 lb | 0.454 kg | Meat and produce |
| 1 gallon | 3.785 L | Gas and milk |
| 1 cup | ≈ 237 ml | Recipes |
| 1 foot | 30.48 cm | Height and room sizes |
| 1,000 sq ft | ≈ 92.9 m² | Apartment listings |
| 5'9" | ≈ 175 cm | Height on your license |
For the full explanation with cooking and sizing examples, read our guide to US measurement units.
Quick mental math
You do not need your phone every time. These approximations are good enough for daily life, and the tool above gives the exact figure when you need it:
- Fahrenheit to Celsius: subtract 30, then halve. 90°F is roughly 30°C (exactly 32.2°C). The exact formula is (F − 32) × 5 ÷ 9.
- Miles to kilometers: multiply by 1.6. A sign saying "Exit 12 miles" means about 19 km.
- Pounds to kilograms: halve, then subtract a tenth of the result. 150 lb ≈ 75 − 7.5 = 67.5 kg (exactly 68).
- Height in feet and inches: a foot is 30.5 cm and an inch 2.54 cm, so "5 feet 9 inches" is about 175 cm.
In the kitchen, the store and at the pump
| What you see | What it means |
|---|
| 1 cup | 236.6 ml (a little smaller than a 250 ml metric cup) |
| 1 tablespoon / 1 teaspoon | 14.8 ml / 4.9 ml |
| Oven 350°F / 400°F | About 177°C / 204°C |
| $3.50 per gallon | About $0.92 per liter |
| Tire 35 psi | About 2.4 bar |
Common questions
Why does the US still use these units?
The metric system has been legal in the US since the 19th century and is standard in science, medicine and the military, but everyday life kept customary units: roads in miles, weather in Fahrenheit, weight in pounds. Medicine doses, for example, are written in milligrams and milliliters, so read labels carefully.
Is a US gallon the same as a UK gallon?
No. A US gallon is 3.785 liters; an imperial gallon is about 4.546 liters. Fluid ounces and cups differ too, which is why American and British recipes do not match exactly.
What does "feels like" mean in the forecast?
It is the apparent temperature after wind chill in winter or humidity in summer. Dress for that number rather than the base reading.
