Unit Converter: Convert Anything Instantly (Length, Weight, Temperature & More)
A recipe asks for 250 grams but your scale shows ounces. A friend in the US mentions their height in feet while you think in centimeters. A weather app shows 86°F and you want to know if it is hot. Unit conversions are a daily fact of life, and getting them wrong has real costs — from a ruined cake to a missed flight. This guide covers the conversions people search for most and hands you a free converter with 40+ units.
The Conversions People Search for Every Day
| Conversion | Exact factor | Example |
|---|---|---|
| Inch → cm | 1 in = 2.54 cm | 6 ft 2 in = 187.96 cm |
| kg → lbs | 1 kg = 2.2046 lb | 75 kg ≈ 165.3 lb |
| °F → °C | (F − 32) × 5/9 | 86°F = 30°C |
| Miles → km | 1 mi = 1.60934 km | 10 mi ≈ 16.09 km |
| Liter → gallon (US) | 1 gal = 3.785 L | 10 L ≈ 2.64 gal |
| m/s → km/h | × 3.6 | 10 m/s = 36 km/h |
Kitchen Conversions: Don't Ruin the Recipe
- 1 cup (US) = 240 ml; 1 tablespoon = 15 ml; 1 teaspoon = 5 ml
- Butter: 1 stick = 113 g; flour: 1 cup ≈ 120 g
- Oven: 350°F = 180°C (moderate); 400°F = 200°C
- When in doubt, weigh dry ingredients — grams beat cups for accuracy
Travel Conversions That Save You Trouble
Speed limits in km/h versus mph, baggage limits in kg versus lb, distances in miles versus kilometers, temperatures for packing. A quick conversion before you leave avoids overpacking, overweight luggage fees and speeding tickets in an unfamiliar system.
Science and Engineering: Precision Matters
Engineering and lab work use exact official factors (like 1 inch = 2.54 cm exactly). Our converter keeps up to 6 decimal places and converts through base units, so results match official references — from nanometers to kilometers, milligrams to tonnes.
Temperature: The Tricky One (Offsets, Not Just Factors)
Unlike length or weight, temperature conversions involve offsets, not just multiplication. Celsius to Fahrenheit: (C × 9/5) + 32. Fahrenheit to Celsius: (F − 32) × 5/9. Kelvin adds 273.15 to Celsius. Remember the handy reference points: 0°C = 32°F (freezing), 100°C = 212°F (boiling), 37°C ≈ 98.6°F (body).
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Frequently Asked Questions
Exactly 2.54 cm. Multiply inches by 2.54 to convert.
Subtract 32, then multiply by 5/9. Example: 86°F → (86−32)×5/9 = 30°C.
Multiply kilograms by 2.2046. Example: 75 kg ≈ 165.3 lb.
3.785 liters in a US gallon; 4.546 liters in a UK gallon.