Unit Converter

Convert between length, weight, temperature, and volume instantly. Bidirectional — edit either side and the other updates. Plus a quick-reference table for the most common conversions.

Where this fits

✨ Everyday & Learning Households

This tool sits in the everyday & learning domain and connects best with the next tools in that decision lane.

Standard Tip15 – 20%(restaurant)

IRS Mileage Rate67¢/mi(2024 standard)

Sales Tax Avg~8.9%(US combined avg)

From

Common Length Conversions

1 mi=1.609 km

1 km=0.621 mi

1 ft=30.48 cm

1 m=3.281 ft

1 in=2.54 cm

1 yd=0.914 m

Convert 1 mm → m

value × mm_factor

1 × 0.001

= 0.001000 m

Convert m → m

base_value ÷ m_factor

0.001000 ÷ 1

= 0.001000 m

All length conversions go through m as the base unit.

Key insight

1 mm = 0.001000 m. The conversion factor is 0.001000× (mm → m). All linear unit conversions use a single multiplication factor derived from the SI base unit.

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