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Enter any measurement and convert it instantly between units — kilograms to pounds, Celsius to Fahrenheit, meters to feet, liters to gallons, and hundreds more. Covers 8 categories: length, weight, temperature, area, volume, speed, data, and time.
Whether you are calculating luggage weight for a flight, converting a recipe from metric to imperial, checking a temperature reading, or figuring out how many square meters your apartment is, a unit converter eliminates the mental math. Our converter handles all 8 major measurement categories in your browser — no signup, no app install, no data sent anywhere.
These are the conversions people look up most often. Bookmark this table or use our unit converter for instant results on any value.
| From | To | Multiply By | Example |
|---|---|---|---|
| 1 kilogram | Pounds | 2.205 | 70 kg = 154.3 lbs |
| 1 mile | Kilometers | 1.609 | 5 miles = 8.045 km |
| 0 degrees C | Fahrenheit | (C x 9/5) + 32 | 0 C = 32 F |
| 1 gallon (US) | Liters | 3.785 | 2 gal = 7.571 L |
| 1 acre | Square meters | 4,047 | 5 acres = 20,234 m2 |
| 1 GB | Megabytes | 1,024 | 4 GB = 4,096 MB |
| 1 meter | Feet | 3.281 | 10 m = 32.81 ft |
| 1 inch | Centimeters | 2.54 | 12 in = 30.48 cm |
| 1 ounce | Grams | 28.35 | 8 oz = 226.8 g |
| 1 liter | US fluid ounces | 33.814 | 2 L = 67.63 fl oz |
| 100 km/h | Miles per hour | 0.621 | 100 km/h = 62.1 mph |
| 1 hour | Seconds | 3,600 | 2.5 hr = 9,000 sec |
There are several ways to convert units online. Here is how our converter compares to the most common alternatives.
| Feature | WildandFree Converter | Google "convert" | UnitConverters.net | ConvertUnits.com | RapidTables |
|---|---|---|---|---|---|
| Cost | ✓ Free | ✓ Free | ✓ Free | ✓ Free | ✓ Free |
| Ads | ✓ No ads | ✓ No ads | ✗ Heavy ads | ✗ Heavy ads | ✗ Heavy ads |
| All 8 categories | ✓ Length, weight, temp, area, volume, speed, data, time | ~Most common only | ✓ Extensive | ✓ Extensive | ✓ Extensive |
| Works offline | ✓ Browser-based, works offline | ✗ Requires internet | ✗ Requires internet | ✗ Requires internet | ✗ Requires internet |
| Mobile-friendly | ✓ Fully responsive | ✓ Good on mobile | ~Cluttered on mobile | ~Cluttered on mobile | ~Cluttered on mobile |
| No signup required | ✓ No account needed | ✓ No account needed | ✓ No account needed | ✓ No account needed | ✓ No account needed |
| Instant results | ✓ Results as you type | ✓ Instant | ~Page reload | ~Page reload | ~Page reload |
| Privacy | ✓ No data collected | ~Logged to Google | ~Ad trackers | ~Ad trackers | ~Ad trackers |
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards, and miles. Length is the most common conversion category — people convert meters to feet for room dimensions, kilometers to miles for driving distances, and centimeters to inches for screen sizes and body measurements.
Convert between milligrams, grams, kilograms, ounces, pounds, and tons. Weight conversions come up constantly: checking luggage limits (usually 23 kg / 50 lbs), converting body weight between systems, reading nutrition labels, and weighing packages for shipping.
Convert between Celsius, Fahrenheit, and Kelvin. This is the trickiest conversion because the formula is not a simple multiplication — it involves both multiplication and addition. The formula is F = (C x 9/5) + 32. Our converter handles it instantly so you never have to remember the formula.
Convert between square meters, square feet, square kilometers, square miles, acres, and hectares. Area conversions matter for real estate (square feet vs square meters), land (acres vs hectares), and geography (square miles vs square kilometers).
Convert between milliliters, liters, fluid ounces, cups, pints, quarts, and gallons. Volume is essential for cooking (metric recipes vs imperial), fuel (liters vs gallons), and beverages. Note that US and imperial gallons are different sizes — our converter uses US measurements.
Convert between meters per second, kilometers per hour, miles per hour, and knots. Speed conversions come up for travel (km/h vs mph on road signs), weather (wind speed), and sports (sprint speeds, pitch velocity).
Convert between bits, bytes, kilobytes, megabytes, gigabytes, and terabytes. Data size conversions help when comparing storage plans, calculating download times, or understanding file sizes. Remember: 1 GB = 1,024 MB in binary (computer) terms.
Convert between milliseconds, seconds, minutes, hours, days, weeks, and years. Time conversions are useful for project planning (how many hours in 90 days?), cooking (minutes to seconds for precise timing), and scientific calculations.
Some conversions come up so often that it is worth memorizing the rough numbers:
You do not always need a tool. Here are rough-and-ready shortcuts that get you within 5 to 10 percent of the exact answer:
The United States is one of only three countries in the world that has not officially adopted the metric system — the other two are Myanmar and Liberia. Every other country uses meters, kilograms, liters, and Celsius as their standard.
The metric system is base-10, making it inherently simpler. There are 1,000 meters in a kilometer, 1,000 grams in a kilogram, and 1,000 milliliters in a liter. The imperial system has 12 inches in a foot, 3 feet in a yard, 1,760 yards in a mile, 16 ounces in a pound, and 8 pints in a gallon — none of which follow a consistent pattern.
In practice, most Americans encounter metric in science classes, at the gym (weight plates are often in kg), on nutrition labels (grams), and when traveling internationally. That is why unit converters remain one of the most-used tools on the internet.
Convert any measurement instantly — length, weight, temperature, area, volume, speed, data, and time.
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