Everyday tools
Convert any unit in a second
Length, weight, temperature, area, volume, speed, and time — instant and accurate, with common conversions spelled out in plain numbers.
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All converters
Length Converter
Convert between meters, feet, inches, miles, kilometers, yards, and more.
Weight Converter
Convert between kilograms, pounds, ounces, grams, stones, and tons.
Temperature Converter
Convert between Celsius, Fahrenheit, Kelvin, and Rankine.
Area Converter
Convert between square meters, square feet, acres, hectares, and more.
Volume Converter
Convert between liters, gallons, cubic meters, milliliters, cups, pints, and more.
Speed Converter
Convert between km/h, mph, m/s, knots, and feet per second.
Time Converter
Convert between seconds, minutes, hours, days, weeks, months, and years.
Use exact units first
Pick the unit you actually have before rounding. A small rounding shortcut can matter when scaling a recipe, checking a shipment, or converting measurements for a quote.
Check the context
A conversion answers the unit question, not the decision around it. Materials, tolerances, and local conventions can each call for a margin of safety.
Then make the decision
When cost, time, or quantity rides on the converted value, use the related calculator or guide — the converter is the first step, not the answer.
Converter topics
Grouped by unit family and use case.