Private — every conversion runs in your browser
Free online unit converter, with the formula shown
58 converters for weight, volume, length, area, temperature and speed. Each one shows the exact formula behind its answer, so you can check the arithmetic instead of trusting it.
Search all 58 converters by unit name or symbol — press / or Ctrl K from anywhere on the site.
- Runs in your browser
- Exact formula on every page
- US and Imperial spelled out
- Free, no sign-up
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Celsius to Fahrenheit
Type a number above to see the answer.
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Open the full Celsius to Fahrenheit page →
Most used
Popular converters
- Celsius to Fahrenheit °C → °F
- Fahrenheit to Celsius °F → °C
- Pounds to Kilograms lb → kg
- Kilograms to Pounds kg → lb
- Kilometers to Miles km → mi
- Centimeters to Inches cm → in
- Milliliters to Ounces mL → fl oz
- Ounces to Milliliters fl oz → mL
- km/h to mph km/h → mph
- Ounces to Cups fl oz → cup
Categories
Browse by category
- Weight How heavy something is — pounds, kilograms, grams, ounces and stone.
- Volume How much liquid fits in something — teaspoons, tablespoons, milliliters, liters, cups, pints, quarts and gallons.
- Length How long, tall or far something is — millimeters, inches, feet, centimeters, meters, kilometers and miles.
- Area How much floor or ground something covers — square meters, square feet, acres and hectares.
- Temperature How hot or cold something is — Celsius, Fahrenheit and Kelvin.
- Speed How fast something is going — km/h, mph, m/s and knots.
At a glance
Quick answers
The conversions people look up most, with the exact figure. Each row links to the converter if you need a different number.
| Question | Answer |
|---|---|
| 1 kilogram in pounds | 2.2046 |
| 1 pound in kilograms | 0.45359 |
| 1 inch in centimeters | 2.54 |
| 1 meter in feet | 3.2808 |
| 1 liter in US gallons | 0.2642 |
| 1 US cup in milliliters | 236.59 |
| 1 mile in kilometers | 1.609344 |
| 1 mile per hour in km/h | 1.609344 |
| 1 square meter in square feet | 10.7639 |
How it works
How to convert a unit here
- Open the converter for your pair, from the lists above.
- Type your number into the first box. The answer appears in the second as you type.
- Need it the other way round? Press Swap. Need more or fewer decimal places? Change Decimals. Nothing reloads, and nothing is sent anywhere.
Common questions
Common questions about converting units
Are these conversions exact?
The factors are. Most are exact by international definition — 1 lb is exactly 0.45359237 kg, 1 in is exactly 2.54 cm, 1 mph is exactly 1.609344 km/h — and the arithmetic keeps full precision. What gets rounded is the display, to four decimal places by default, and you can change that on any page. Where a factor genuinely does not terminate, the page says so instead of implying the result is exact. The methodology page lists every factor and its source.
Why does temperature need a different formula?
Because the scales disagree about where zero is. Every other unit here shares a zero — nothing weighs zero pounds and something else — so converting is one multiplication. Water freezes at 0 °C and at 32 °F, so a temperature conversion has to shift the number as well as scale it: °F = °C × 1.8 + 32.
Can I convert milliliters to kilograms, or cups to grams?
Not with one fixed number, and it is the most common mix-up on this site. Milliliters and cups measure volume, grams and kilograms measure weight, and how much a cup weighs depends on what is in it. Water is the one people remember: a milliliter of water weighs about a gram, so a liter is about a kilogram. The same split runs through ounces — ounces to cups uses fluid ounces, and ounces to grams uses weight ounces.
Do you use US or Imperial gallons?
US liquid units by default, because they are what American recipes, cartons and fuel pumps mean. The UK Imperial gallon is larger — about 4.55 L against the US gallon’s 3.79 L — and every page that could be ambiguous says which one it uses. See liters to gallons.
Can I type a comma as the decimal point?
Yes. 1,5 is read as one and a half, the way it is written across much of Europe.
Commas that group digits in threes are read as thousands separators instead, so
1,500 is fifteen hundred and 12,000,000 twelve million, as in US and
UK usage. When in doubt, type a point:
1.5 is never ambiguous.
Does anything I type get sent to a server?
No. Every calculation runs in JavaScript on your own device, and the values you enter are never transmitted, logged or stored. There is no account and nothing to sign up for. The privacy policy sets out what the advertising and analytics tags do collect.
Is it free?
Yes, all 58 converters, with no limits and no sign-up. The site is paid for by advertising, which is kept below the answer rather than in front of it.
Guides
Conversions, explained
The reasoning behind the numbers: why temperature needs two steps, what an oven dial is really asking for, and charts you can read a value off without calculating anything.
- Speed limits in km/h, converted to mph Guide
- Height conversion chart: cm to feet and inches Guide
- Stone to kg chart: 8 to 20 stone in kilograms Guide
- How many mL in a cup? US, metric and UK cups Guide
- How many cups in a quart? US, UK and metric cups Guide
- How many mL in an ounce? US, UK and weight ounces Guide
- The Celsius to Fahrenheit formula, explained Guide
- Oven temperature conversion: Celsius, Fahrenheit and gas marks Guide
- Celsius to Fahrenheit chart, −40 to 300 Guide
- Air fryer temperature conversion: oven recipes, adjusted Guide
- All conversion guides
Directory
All 58 converters
Weight converters
- Grams to Pounds g → lb
- Pounds to Ounces lb → oz
- Pounds to Kilograms lb → kg
- Kilograms to Pounds kg → lb
- Kilograms to Stone kg → st
- Ounces to Grams oz → g
- Pounds to Stone lb → st
- Stone to Pounds st → lb
- Stone to Kilograms st → kg
- Grams to Ounces g → oz
- Kilograms to Grams kg → g
- Pounds to Grams lb → g
Volume converters
- Milliliters to Ounces mL → fl oz
- Ounces to Cups fl oz → cup
- Quarts to Gallons qt → gal
- Liters to Gallons L → gal
- Ounces to Milliliters fl oz → mL
- Gallons to Liters gal → L
- Cups to Milliliters cup → mL
- Milliliters to Liters mL → L
- Liters to Milliliters L → mL
- Milliliters to Cups mL → cup
- Tablespoons to Milliliters tbsp → mL
- Milliliters to Tablespoons mL → tbsp
- Teaspoons to Milliliters tsp → mL
- Milliliters to Teaspoons mL → tsp
- Pints to Cups pt → cup
- Cups to Pints cup → pt
- Cups to Ounces cup → fl oz
- Gallons to Quarts gal → qt
Length converters
- Feet to Centimeters ft → cm
- Centimeters to Inches cm → in
- Inches to Centimeters in → cm
- Meters to Feet m → ft
- Feet to Meters ft → m
- Kilometers to Miles km → mi
- Miles to Kilometers mi → km
- Millimeters to Inches mm → in
- Inches to Millimeters in → mm
- Centimeters to Feet cm → ft
- Inches to Feet in → ft
- Feet to Inches ft → in
Area converters
- Square Meters to Square Feet m² → ft²
- Square Feet to Square Meters ft² → m²
- Acres to Square Feet ac → ft²
- Square Feet to Acres ft² → ac
- Hectares to Acres ha → ac
- Acres to Hectares ac → ha
Temperature converters
- Celsius to Fahrenheit °C → °F
- Fahrenheit to Celsius °F → °C
- Celsius to Kelvin °C → K
- Kelvin to Celsius K → °C
Speed converters
- km/h to mph km/h → mph
- mph to km/h mph → km/h
- m/s to km/h m/s → km/h
- km/h to m/s km/h → m/s
- Knots to mph kn → mph
- Knots to km/h kn → km/h
Want the numbers behind the results? Read our conversion methodology.