Coordinate Format Converter

DD, DMS and DDM latitude/longitude

Quick Answer

Coordinate Format Converter: DD, DMS and DDM latitude/longitude. Coordinate Format Converter uses standard unit conversion formulas to compute accurate results instantly.

Latitude (DD, ±90)

Longitude (DD, ±180)

Decimal degrees (DD)39.904200, 116.407400

DMS (deg° min′ sec″)39° 54′ 15.12″ N, 116° 24′ 26.64″ E

DDM (deg° decimal-min′)39° 54.25200′ N, 116° 24.44400′ E

Calculation steps

1Latitude: integer part 39°; fraction 0.904200 × 60 = 54.2520′ → 54′ + fraction × 60 = 15.12″
2Same for longitude → 116° 24′ 26.64″ E
3DDM: fold seconds into minutes: 39° 54.25200′ N

1° = 60′, 1′ = 60″. At the equator, 1″ of latitude ≈ 30.9 m; 6 decimal places of DD gives ~0.1 m precision — plenty for mapping apps (Google/Gaode use DD; aviation & marine charts use DDM).

Was this tool helpful?

How to Use

Pick units: switch source and target units in the Coordinate Format Converter.
Enter a value: results sync both ways instantly — no convert button needed.
Use the reference table: common conversions are listed for instant lookup.
Copy the result: copy the converted value with its unit.

Key Points

Coordinate Format Converter is a free online unit conversion tool — open and use, no sign-up.
All calculations run locally in your browser; your data never leaves the device.
Key capability: DD, DMS and DDM latitude/longitude.
Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Coordinate Format Converter formula

Coordinate Format Converter uses standard unit conversion formulas to compute accurate results instantly.

FAQ

How do I use the Coordinate Format Converter?

Open the page and fill in the input fields — results update automatically. DD, DMS and DDM latitude/longitude.

Are the results accurate?

Yes. Standard formulas and conversion factors are used and verified.

Is it free? Do I need to sign up?

Completely free. No registration, login or download required.

Does it work on mobile?

Yes. The responsive design works on phones, tablets and desktops.

Is my data saved?

No. Everything runs locally in your browser.

Related Guides

Source & Updates

Based on SI conversion factors and international standards. Last updated: 2025-07

Authoritative sources:

NIST SP 811 unit conversion

Last updated: 2026-08-07

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. Coordinate Format Converter[EB/OL]. https://www.yijiansuan.com/en/c/convert/coordinate

Results provided by this tool are for reference only and do not constitute professional advice.