LatLong Converter

DDM → Decimal Converter

DDM
Decimal
DDM
Decimal

DDM → Decimal Conversion Guide

📐 Conversion Formula
// DDM ↔ Decimal Degrees conversion
// DDM format: DD°MM.MMMM'[N/S/E/W]
// Decimal: DD.DDDDD°

// DDM → Decimal:
Decimal = Degrees + Minutes/60
// Apply sign: N/E = positive, S/W = negative

// Decimal → DDM:
Degrees = floor(|Decimal|)
Minutes = (|Decimal| - Degrees) × 60
Direction = Decimal >= 0 ? (lat ? 'N' : 'E') : (lat ? 'S' : 'W')

// Example:
// 40°26.7717'N = 40 + 26.7717/60 = 40.446195°N
// 79°58.9336'W = -(79 + 58.9336/60) = -79.982227°W

DDM (Degrees and Decimal Minutes) and Decimal Degrees are two common coordinate formats. DDM expresses coordinates as degrees followed by decimal minutes. This format is widely used in GPS NMEA sentences, marine navigation, and USGS topographic maps. Converting between them is purely mathematical with no geodetic transformation.

📋 Operation Steps
  1. Enter your DDM coordinates in the input field (latitude, longitude, one pair per line)
  2. Click the Convert button to transform coordinates from DDM to Decimal
  3. Review the converted Decimal coordinates in the output field
  4. Copy the results or save them as an XLSX file for further use
💡 Tips
  • Ensure coordinates are within valid ranges before conversion
  • For batch conversions, enter one coordinate pair per line
  • Verify a sample of converted coordinates on your target platform
  • All conversions are performed client-side for complete data privacy

Frequently Asked Questions