One base-unit method
Every supported length unit is converted through metres. For example, one inch is exactly 0.0254 metres and one international foot is exactly 0.3048 metres.
Why one converter is enough
A single source selector and target selector cover many conversion directions without creating a separate page for every pair.
Large and tiny distances
Scientific notation is used automatically for very large or very small finite results so long values stay readable.
Frequently asked questions
Does conversion happen in my browser?
Yes. These value conversions run in the browser and do not require an account.
Should I verify a critical conversion?
Yes. For engineering, laboratory, medical, financial, legal, or safety-critical work, verify the unit definition and result against an authoritative standard for your context.