Unit Converter
Miles to meters, pounds to kilos, °F to °C — convert just about anything in a snap.
📖 How it works & FAQWhat this converter is for
This tool turns a number in one unit into the same amount in another — length, weight, temperature, and volume. It's the thing you reach for when a recipe is in grams but your scale reads ounces, when a European product listing gives dimensions in centimeters, or when a running app logged your route in kilometers and you think in miles. Everything recalculates the moment you type, so you can compare a few options quickly without hunting for a formula.
When you'd actually use it
Common jobs: converting a room measurement from feet to meters before buying a rug, changing a body weight from stone or pounds to kilograms for a form, working out how many milliliters are in a cup for an overseas recipe, or reading a thermostat that's stuck in Celsius. Temperature is the tricky one — it isn't a simple multiply. Water freezes at 0 °C / 32 °F and boils at 100 °C / 212 °F, so the tool applies the offset for you instead of just scaling the number.
A quick worked example
Say a shipping box is listed as 45 cm long and you need inches. There are 2.54 cm in an inch, so 45 ÷ 2.54 ≈ 17.7 inches. For volume, 1 US cup ≈ 237 ml, so a 500 ml bottle is a little over two cups. A good tip: the US fluid ounce and the UK (imperial) fluid ounce are slightly different sizes, so double-check which system a recipe means before you trust a volume result.
How to use it
- Pick a category — length, weight, temperature, or volume.
- Type the amount you have into the input field.
- Choose the "from" unit and the "to" unit from the dropdowns.
- Read the converted result instantly, and adjust either unit to compare more.
FAQ
- Why doesn't temperature convert like the other units?
- Because Celsius and Fahrenheit don't share a zero point. The tool uses the real formula (°F = °C × 9/5 + 32) rather than a single multiplier, so cold and hot temperatures both come out right.
- Are the results rounded?
- Values are shown to a sensible number of decimals for everyday use. For engineering or lab work where exact precision matters, treat the display as a close estimate and verify critical figures.
- Does anything get uploaded?
- No. The math runs entirely in your browser, so the numbers you enter stay on your device.
- Is it free?
- Yes, it's free and supported by ads on the page.