Unit Converter
Convert length, weight, temperature, and more. Instantly, in your browser.
All conversions happen locally in your browser. Nothing is uploaded or stored.
About this converter
Switching between metric and imperial units comes up constantly — checking a recipe written in cups when your kitchen scale reads grams, converting a US shoe size chart listed in inches, or figuring out how many kilometers a 10-mile run actually covers. This tool covers eight everyday categories (length, weight, temperature, area, volume, speed, data storage, and time) with the common units people actually search for, so you rarely need to open a second tab to double-check a formula.
Every conversion is calculated using a fixed, verified base-unit factor rather than a rough approximation — meters for length, kilograms for weight, liters for volume, and so on — so switching between any two units in the same category (say, miles to centimeters) stays accurate no matter how unusual the pairing is.
How to use the converter
- Pick a category — choose length, weight, temperature, area, volume, speed, data storage, or time from the buttons above.
- Set your starting unit — select the unit your value is currently in from the "From" dropdown.
- Enter a value — type the number you want to convert.
- Choose the target unit — pick what you want to convert to in the "To" dropdown; the result updates instantly as you type.
Where this comes in handy
Cooking & recipes
Convert cups, ounces, and grams between US and metric recipe formats without guessing at rough equivalents.
Travel & navigation
Switch between miles and kilometers, or Fahrenheit and Celsius, when checking distances and weather abroad.
Fitness tracking
Convert pace and distance between km/h, mph, and m/s, or body weight between kg and lb for logs and goals.
Tech & storage planning
Check how many MB fit in a GB or TB when comparing storage plans, file sizes, or download limits.
Common conversions people look up
1 mile
1.609 km
1 kg
2.205 lb
100°F
37.8°C
1 GB
1024 MB
Questions people ask
Why do my results have so many decimal places?
Some conversions (like miles to kilometers) don't land on round numbers, so the tool shows up to six decimal places for accuracy. You can round the displayed value to whatever precision your use case needs.
Is this accurate enough for professional or scientific use?
The conversion factors used here match standard international definitions (e.g. 1 inch = 2.54 cm exactly), so results are accurate for everyday, academic, and most professional purposes. For regulated or legal measurements, always confirm against an official reference.
Does it work without an internet connection?
Once the page has loaded, all math runs locally in your browser using JavaScript — no server call is made for the conversion itself, so it keeps working even on a flaky connection.
Why does temperature conversion behave differently from the others?
Unlike length or weight, temperature scales don't share a common zero point, so converting between Celsius, Fahrenheit, and Kelvin uses a formula (like multiplying and adding an offset) rather than a simple multiplication factor — the tool handles this automatically either way.
Can I convert between two non-metric units, like miles to feet?
Yes — every unit is converted through a common base unit internally, so any two units within the same category convert correctly, whether both, one, or neither is metric.
Is my data stored or sent anywhere when I use this tool?
No — the values you type never leave your device. Everything is calculated in your browser's memory and is cleared the moment you close or refresh the page.