geography Calculators
Last updated: May 2026
Distance Between Coordinates Calculator
Compute the distance between two latitude/longitude points using Haversine (great-circle), Euclidean (flat-Earth approximation), or Manhattan (city-block) formulas.
Map Scale Calculator
Convert a distance measured on a paper or digital map to the corresponding real-world distance using the map's scale ratio.
Timezone Offset Calculator
Convert a time from one timezone to another given the UTC offsets of both.
Elevation Grade Calculator
Compute the steepness of a slope as a grade percentage, an angle in degrees, or a rise/run ratio given the horizontal distance and elevation gain.
Population Density Calculator
Compute population density — people per unit area — from total population and area.
Coordinate Format Converter
Convert a decimal degree coordinate into degrees, minutes, and seconds (DMS) format.
Magnetic Declination Adjuster
Convert a compass (magnetic) bearing to a true bearing by applying the local magnetic declination.
Watershed Drainage Area Calculator
Estimate the drainage area of a watershed from its length, average width, and a shape factor.
Great Circle Distance Calculator
Finds the shortest path between two points on Earth's curved surface using GPS coordinates.
Sun Angle Calculator
Estimate the sun's maximum elevation angle above the horizon for a given latitude and day of year.
River Gradient Calculator
Calculate the steepness of a river or stream in metres per kilometre.
Climate Zone Calculator
Classify a location into a broad climate zone using its average annual temperature and total annual rainfall.
Wind Chill Calculator
Find the apparent 'feels-like' temperature when wind is factored into cold air conditions.
Coastline to Area Ratio Calculator
Compute the coastline-to-area ratio of a landmass by dividing coastline length by the square root of land area.
Urban Sprawl Index Calculator
Measure urban sprawl by comparing the percentage growth of built-up urban area to population growth.
Heat Island Effect Calculator
Estimate the intensity of the urban heat island effect by comparing city and rural temperatures, adjusted for wind speed.
Vegetation Index Calculator
Calculate the Normalized Difference Vegetation Index (NDVI) from near-infrared and red reflectance values.
Earthquake Distance Calculator
Estimate the distance from a seismograph station to an earthquake epicenter using the arrival time difference between P and S seismic waves.
Drainage Density Calculator
Calculate the drainage density of a watershed by dividing total stream length by drainage area.
Horizon Distance Calculator
Calculate the maximum distance at which an observer can see a target object over the horizon, based on both their heights above sea level.
Geographic Area Calculator
Calculate the area of rectangular, circular, or triangular regions in square kilometers, square miles, or hectares.
Time Zone Difference Calculator
Convert a local time from one time zone to another and find the hour difference between any two UTC offsets.
Elevation Gain Calculator
Calculate elevation gain, slope grade percentage, and trail difficulty rating for any hiking route or road segment.
Sunrise Sunset Time Calculator
Estimates local sunrise, sunset times, and total daylight hours for any latitude, longitude, and date.
Geographic Midpoint Calculator
Find the true geographic center between two GPS coordinates, with optional weighting for each location.
Time Zone Converter Calculator
Converts a clock time from one UTC offset to another, with optional daylight saving adjustment.
Map Scale Distance Calculator
Convert a measurement taken on a paper or digital map into the actual real-world distance it represents.
Population Density Calculator
Calculates how many people live per unit area for a given region, using total population and land area.
Elevation Gradient Calculator
Calculate the slope or grade percentage between two geographic points given their elevations and horizontal distance.
Heat Index Climate Calculator
Calculate the apparent 'feels like' temperature by combining air temperature, humidity, and wind speed.