🧮 Calculators & Daily Life

Unit Converter

Real-time conversion across length, weight, area, volume, temperature, speed, and data size. Handy when a recipe, blueprint, or weather forecast uses a unit you don't think in. Nothing leaves your browser.

Examples (click to try)
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Common conversions

How to use Unit Converter

Select a category, choose the "From unit" and "To unit", then enter a number. The result updates in real time. Press the ⇄ button to instantly swap the From and To units. Not sure where to start? Click one of the "Examples (click to try)" chips above the value field — it sets the category, units, and number for you and shows the result right away.

Worked example: Pick the "Length" category, set the From unit to "Mile" and the To unit to "Kilometer", then type 1 in the value field. The result shows 1.609344 (1 mile = 1.609 km). Change the value to 3 and it updates in place to 4.828032 — no Enter key needed.

Speed tip: Conversion runs live on every keystroke, so there's no button to press. Just edit the value and the result follows along, and changing a unit recalculates instantly.

  • Length: Supports 9 units — m, km, cm, mm, mile, yard, feet, inch, and nautical mile.
  • Weight: Supports 7 units — g, kg, mg, ton (t), pound (lb), ounce (oz), and monme.
  • Area: Supports m², km², cm², mm², hectare (ha), are (a), tsubo, jo (tatami), and acre.
  • Volume: Supports L, mL, m³, cm³, US gallon, US quart, US pint, cup (240 mL), tablespoon, and teaspoon.
  • Temperature: Supports Celsius (℃), Fahrenheit (℉), and Kelvin (K).
  • Speed: Supports km/h, m/s, mph, and knot.
  • Data Size: Supports B, KB, MB, GB, and TB (using 1 KB = 1024 B).

Useful scenarios

  • Convert cups and ounces in foreign recipes to metric units (mL, g)
  • Convert inch and feet measurements for DIY materials to cm and m
  • Convert Fahrenheit temperatures to Celsius before traveling abroad
  • Check unit conversions for science or math homework and exam prep

Frequently Asked Questions

Is my input data sent to a server?
No. All conversion processing happens entirely in your browser. Your input values and results are never transmitted to or stored on any server, so you can use this tool with confidence.
How does the temperature conversion work?
The tool supports three temperature scales: Celsius (℃), Fahrenheit (℉), and Kelvin (K). Celsius to Fahrenheit uses the formula ℉ = ℃ × 9/5 + 32, and Celsius to Kelvin uses K = ℃ + 273.15.
Does the data size converter use 1 KB = 1000 B or 1024 B?
This tool uses 1 KB = 1024 bytes (binary standard), which matches how computers actually store data internally. This differs from the 1 KB = 1000 B convention used by some storage manufacturers.