Free Unit Converters — Length, Weight, Temperature & More

Convert length, weight, temperature, speed, data size, area, volume, pressure, and energy. Fast, free, browser-based unit converters. No signup required.

Popular tools

Unix Timestamp Converter Online — Free Epoch Converter

Convert Unix timestamps to human-readable dates and vice versa. Free online timestamp converter. Supports seconds and milliseconds. No signup required.

Unit Converter Online — Length, Weight, Temp

Convert length, weight, temperature, speed, and data units online for free. Fast, accurate, instant conversion. No signup needed.

Date Difference Calculator Online — Days Between Dates

Calculate days, weeks, months, and years between two dates online for free. Instant date difference, no signup. Handles leap years automatically.

Speed Converter — mph, km/h, knots Online

Convert speed between mph, km/h, m/s, knots, and ft/s online for free. Instant conversion, no signup required.

Common tasks

Centimeters to Inches (cm → in)Kilograms to Pounds (kg → lb)Celsius to Fahrenheit (°C → °F)Meters to Feet (m → ft)Kilometers to Miles (km → mi)MB to GB (data size)All-in-one unit converter Convert timestamps to dates Calculate days between dates

FAQ

Which units are supported?

We cover length, weight, temperature, volume, area, data size, speed, time, pressure, energy, and angle. Each category has dedicated conversion pages for popular unit pairs.

Are the conversions accurate?

Yes. All conversions use standard, internationally recognized conversion factors. Results are accurate to at least 5 decimal places.

Can I use this for exact engineering calculations?

Use it for everyday conversions and quick checks. Verify critical engineering calculations with domain-specific tools.