Travel & Geography

Great circle distance, bearing, coordinates and map scale.

• Area Density Calculator Mass per unit area in kg/m², g/m², lb/ft² and oz/yd², from a mass and an area.
• Bearing Between Coordinates Calculator The initial and final bearing between two latitude and longitude points, with the compass point and the constant-compass bearing.
• Coordinate Converter: DMS and Decimal Degrees Converts latitude and longitude between decimal degrees, degrees minutes seconds, and degrees decimal minutes.
• Elevation Gain and Grade Calculator Total climb and descent along a route from spot heights, with the average grade, angle and slope length.
• Great Circle Distance Calculator The shortest distance over the Earth between two latitude and longitude points, by the haversine formula.
• Map Scale Calculator Converts between distance on a map and distance on the ground, and works out a map’s scale from the two.
• Midpoint Between Coordinates Calculator The halfway point along the great circle between two latitude and longitude points.
• Nautical Miles and Knots Calculator Passage time from distance in nautical miles and speed in knots, with both converted to everyday units.
• Population Density Calculator People per square kilometre and square mile, from a population and area you enter.

Travel time, hiking time, trip costs, luggage and flight time.

• Driving Carbon Footprint Calculator A rough estimate of the CO₂ from a car journey, from the distance, fuel economy and an emission factor you can change.
• Flight Carbon Footprint Calculator A rough estimate of a flight’s emissions, from the distance and an emission factor you can change.
• Flight Time Calculator An estimate of flight time from the distance, an assumed cruising speed and a taxi and climb allowance.
• Hiking Time Calculator (Naismith’s Rule) How long a hill walk takes by Naismith’s rule, with a comparison by Tobler’s hiking function.
• Jet Lag Recovery Days Calculator How many days jet lag may take to clear, from the time zones crossed and the direction of travel.
• Luggage Volume Calculator The capacity of a suitcase or bag in litres from its dimensions, and its linear size in cm and inches.
• Packing List Quantity Calculator How many clothes to pack for a trip, from its length and how often you can do laundry.
• Travel Budget and Daily Spending Allowance Calculator How much you can spend per day on a trip, once flights, accommodation and a reserve are taken out of the budget.
• Travel Time and Driving Time Calculator How long a journey takes from its distance and average speed, with driving breaks added if you want them.
• Trip Cost Split Calculator Splits trip costs equally when different people paid for different things, and shows who pays whom to settle up.
• Walking Time Calculator How long a walk takes from its distance and your walking speed, with your pace per kilometre and per mile.

Sunrise, sunset, daylight, golden hour and moon phase.

• Daylight Hours Calculator The length of the day for any date, latitude and longitude, with how it changes through the year.
• Golden Hour Calculator Morning and evening golden hour and blue hour for any date, latitude and longitude, in UTC and at your UTC offset.
• Moon Phase Calculator The approximate moon phase, age and illumination for any date, and the next new and full moons.
• Solar Noon Calculator When the Sun is highest for any date, latitude and longitude, how high it gets, and how far that is from 12:00 on the clock.
• Sunrise and Sunset Calculator Sunrise, sunset and civil twilight for any date and any latitude and longitude, in UTC and at your UTC offset.