Unit Converter
Convert length, weight, or temperature instantly — see the value in every common unit at once.
| Unit | Value |
|---|
| Conversion | Result |
|---|---|
| 1 meter | 3.28084 feet |
| 1 kilometer | 0.621371 miles |
| 1 kilogram | 2.20462 pounds |
| 1 inch | 2.54 centimeters |
| 0°C | 32°F (freezing point of water) |
| 100°C | 212°F (boiling point of water) |
FAQ
What units does this converter support?
Length (millimeters through miles), weight (milligrams through US tons), and temperature (Celsius, Fahrenheit, and Kelvin).
How accurate are the conversions?
All conversions use standard, internationally recognized conversion factors — the same ones used in scientific and engineering contexts, accurate to at least 6 decimal places.
Why does the table show every unit at once instead of just one result?
It's often more useful to see a value across several units at a glance — for example, seeing a length in both feet and meters at the same time — rather than converting one pair repeatedly.
Can I convert temperature the same way as length and weight?
Not quite — temperature scales don't share a simple multiplier the way length and weight units do, since they have different zero points. This tool uses the correct dedicated formulas for Celsius, Fahrenheit, and Kelvin conversions.
What are some common conversions people look up?
Meters to feet, kilometers to miles, kilograms to pounds, and Celsius to Fahrenheit are among the most frequently searched — see the quick reference table above.
Why is 0°C equal to 32°F instead of 0°F?
Celsius and Fahrenheit place their zero points differently — Celsius was defined so that 0° is water's freezing point, while Fahrenheit's zero point was set using a different historical reference, which is why the two scales don't line up at zero.
What's the difference between a US ton and a metric ton?
A US ton (also called a short ton) equals 907.18 kilograms, while a metric ton equals exactly 1,000 kilograms — so a metric ton is about 10% heavier than a US ton.
How many feet are in a mile?
There are 5,280 feet in a mile. This converter gives 5280 feet for one mile, and 1.609 km.
How do I convert pounds to kilograms?
Multiply the pounds by 0.45359237, or divide by 2.20462. For example, 150 lb is 68.0 kg.
How do I convert Celsius to Fahrenheit in my head?
Double the Celsius figure and add 30 for a rough answer, or multiply by 1.8 and add 32 for the exact one. For 20°C the rough method gives 70°F and the exact result is 68°F.
About this tool
Choose a category, enter a value, and pick the unit you're converting from — the table updates instantly to show that value across every common unit in the category. Nothing you enter is saved or sent anywhere.
Worked examples
- Height: 5 feet 10 inches is 70 inches, which is 177.8 cm.
- A marathon: 42.195 km is 26.22 miles.
- Body weight: 70 kg is 154.3 lb, or about 11 stone 0.3 lb (a stone is 14 pounds).
- Oven temperature: 180°C is 356°F.
- Driving distance: 100 miles is 160.9 km.
Length and weight at a glance
| From | To metres | To feet | To inches |
|---|---|---|---|
| 1 inch | 0.0254 | 0.0833 | 1 |
| 1 foot | 0.3048 | 1 | 12 |
| 1 yard | 0.9144 | 3 | 36 |
| 1 mile | 1,609.34 | 5,280.00 | 63,360.00 |
| 1 kilometer | 1,000.00 | 3,280.84 | 39,370.08 |
| From | To kilograms | To pounds | To ounces |
|---|---|---|---|
| 1 ounce | 0.0283 | 0.0625 | 1 |
| 1 pound | 0.4536 | 1 | 16 |
| 1 stone | 6.3503 | 14 | 224 |
| 1 kilogram | 1 | 2.2046 | 35.274 |
| 1 usTon | 907.1847 | 2,000.00 | 32,000.00 |
The converter works by changing your value to a base unit (metres for length, kilograms for weight) and then dividing by each unit's size. That is why every row updates at once, and it means conversions between any two units are consistent.
Temperature is different
Length and weight scale from zero, so a single multiplier is enough. Temperature scales start at different points, so the formulas include an offset: °F = °C × 9/5 + 32, and K = °C + 273.15. The two scales cross at −40.
| Celsius | Fahrenheit | Kelvin | What it is |
|---|---|---|---|
| -40°C | -40°F | 233.15 K | Same in both scales |
| 0°C | 32°F | 273.15 K | Water freezes |
| 20°C | 68°F | 293.15 K | Room temperature |
| 37°C | 98.6°F | 310.15 K | Normal body temperature (approx.) |
| 100°C | 212°F | 373.15 K | Water boils at sea level |
The conversion for a temperature reading does not work for a temperature change. A rise of 10°C is a rise of 18°F, because a change involves only the scale factor and not the offset.
Common mix-ups to avoid
- Ton. A metric ton is 1,000 kg, a US (short) ton is 907.2 kg, and the UK (long) ton is a third variant that is not included here.
- Ounces. This converter uses weight ounces (about 28.35 g). Fluid ounces measure volume and cannot be converted this way.
- Stone. Used for body weight in the UK and Ireland. One stone is 14 pounds, or about 6.35 kg.
- Rounding. For cooking and construction, round only at the end, not at each step, so errors do not build up.