Which unit categories are supported?

Length (mm, cm, m, km, in, ft, yd, mi), Weight (mg, g, kg, metric ton, oz, lb, stone), and Temperature (°C, °F, K).

How precise are the conversions?

Results are accurate to 10 decimal places with trailing zeros trimmed automatically.

Can I convert temperature with this tool?

Yes. Click the Temperature tab and convert between Celsius, Fahrenheit, and Kelvin.

Why use a unit converter for everyday cooking and travel?

Recipes from other countries use grams instead of cups, oven temps in °C vs °F, and ingredient sizes in ml vs oz. International travel means kilometers vs miles. Quick conversion prevents recipe failures and missed exits.

When does precision matter (and when does it not)?

Engineering, medicine, and chemistry need full precision. Cooking, fitness, and travel are fine with rounded values (1 inch ≈ 2.5 cm is close enough for a tape measure). Round at the end, not at each step.

Unit Converter

Converters· 6 tools

Free online unit converter. Convert between common units of length (meters, feet, miles, km), weight (kg, lbs, oz, grams), and temperature (Celsius, Fahrenheit, Kelvin). Fast, accurate, and no signup required.

From

1 Meter (m) = 0.001 Kilometer (km)

Frequently Asked Questions

References

International System of Units (SI) — BIPM

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Frequently Asked Questions

References and sources

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