Instantly convert length, weight, temperature, currency, and 500+ units. No signup. No ads that break your flow. Just results.
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Most-used conversions today
Meter to Foot
Kilometer to Mile
Centimeter to Inch
Mile to Kilometer
Yard to Meter
Foot to Meter
Inch to Centimeter
Nautical Mile to Kilometer
Kilogram to Gram
Kilogram to Pound
Gram to Ounce
Metric Ton to Kilogram
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10 categories · 500+ conversions
ConvertNow is a free, fast, and accurate online unit converter supporting 500+ unit conversions across 13 categories. Whether you need to convert kilometers to miles, kilograms to pounds, or Celsius to Fahrenheit, we provide instant results with the formula shown.
Our currency converter uses live exchange rates, while all other converters use precise scientific constants for maximum accuracy. Every converter includes bidirectional conversion, a swap button, and a reference table.
Simply select a category (length, weight, temperature, etc.), choose your units, enter a value, and get the result instantly. No signup required.
Yes. All conversions use standard, internationally-recognized formulas and constants for maximum accuracy.
Yes! ConvertNow is a Progressive Web App (PWA). Once loaded, most converters work offline. Install it from your browser for the best experience.
ConvertNow supports 500+ unit conversions across 13 categories including length, weight, temperature, currency, area, volume, speed, time, digital storage, and more.
Yes, currency conversions use real-time exchange rates updated regularly via a live API. A fallback to cached rates is used if the API is unavailable.