Travel & geography
328 travel and geography tools: distances between places, coordinates, fuel and trip costs, weather indices and local time. Plan a route or check a figure before you leave, free in your browser.
Rectifying latitude calculator
Turn a geodetic latitude into its rectifying latitude on WGS-84: 45° becomes 44.855682294117°, the angle that makes the true distance from the equator behave…
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Behrmann Equal-Area Projection Calculator
New York (40.7128, −74.006) lands at an x and y in metres on the Behrmann map, a cylinder whose standard parallels sit at 30° north and south so every area…
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32-point compass to bearing
On the full 32-point rose, NNE sits at 22.5°, Southeast by East at 123.75° and North by West at 348.75°: every point is an exact multiple of 11.25°.
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Equidistant conic projection
With standard parallels at 33° and 45°, scale stays true along both parallels and along every meridian.
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Great-circle maximum latitude calculator using Clairaut's relation
With just a starting latitude and a bearing, see how far north and south a great circle reaches: a due-north course touches both poles at 90°, and an eastward…
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Polygon bounding box calculator
For vertices at 40.7128, -74.006, 34.0522, -118.2437 and 41.8781, -87.6298, the box runs from 34.0522, -118.2437 in the south-west to 41.8781, -74.006 in the…
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Meridian radius of curvature
Get the radius of curvature of the meridian at any latitude on WGS84: at 45° it is about 6,367,382 m, so one degree of latitude covers about 111.13 km there.
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Rhumb line midpoint calculator
Find the point halfway along a constant-bearing route: between 51.5074, -0.1278 and 40.7128, -74.006 it lies at 46.1101, -38.882455.
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Distance off by two bearings
Take a bearing of 45° on a landmark, run 2 nautical miles, take 90°, and you were 2.828427124746 miles off at the first sight, 2 at the second and 2 when abeam.
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Effective average speed with stops
Driving 120 km at 90 km/h with half an hour of stops takes 1.833 hours door to door, so your effective average is roughly sixty-five km/h, not 90.
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Departure time calculator for a target arrival
To arrive at 17:30 after a 180 km drive at an average of 90 km/h, leave at 15:30: the calculator works backward from your deadline and tells you when departure…
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Safe following distance calculator
At 100 km/h, a two-second gap means 55.56 metres to the vehicle ahead, and three seconds about 83.33 metres.
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Compare two driving routes
Route A, 120 miles at 60 mph, takes 2 hours and 14 in fuel; route B, 100 miles at 45 mph, burns less but takes longer.
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Road trip toll cost estimator with transponder discount
Estimate the toll line of a road trip budget: 8 segments at one charge each, minus a 15% transponder discount, give the subtotal, the savings and the total, in…
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Car lease monthly payment calculator
With a money factor of 0.0021 over 36 months, see your lease payment split into its two parts: the depreciation charge and the finance charge.
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Fuel consumption from fill-up calculator
Drive 450 km between two full tanks, put 36 litres back in, and your real consumption is 8 L/100 km, or 12.5 km per litre.
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MPG upgrade fuel savings calculator
Going from 25 to 35 mpg over 12,000 miles a year cuts fuel use from 480 to 342.857 gallons, a 28.57 % drop.
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Multi-stop route total distance
New York–Philadelphia 120 km, Washington 140 km and Richmond 110 km add up to 370 km, with running totals of 120, 260 and 370 km.
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Quarter-mile time estimate
A 3,500-pound car with 300 horsepower should run the quarter mile in just over 13 seconds with a trap speed of about 103 mph.
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Tire revolutions per mile calculator
A 225/65R17 tire turns 707.26 times per mile and 439.47 times per kilometer, with an overall diameter of 724.3 mm.
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Torque to horsepower calculator
300 lb-ft at 5252 RPM is exactly 300 horsepower, because the formula multiplies torque by RPM and divides by 5252.
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Trip fuel cost per mile calculator
Enter what a finished trip really cost in fuel and the 500 miles (804.672 km) you drove, and get the cost per mile and per kilometer for your expense records or…
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Vehicle speed from RPM calculator
At 6,000 rpm in a 1.0 top gear with a 3.73 final drive and 650 mm tires, the car does 197.08651 km/h in theory.
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Wheel offset and backspacing calculator for rim fitment
An 8.5-inch wheel with a +35 mm offset has 6.128 inches of backspacing and 3.372 inches of frontspacing.
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Cold-start warm-up fuel calculator
Five minutes of cold-start idling at 1.2 litres per hour burns 0.1 litre of fuel: the warm-up burn rate multiplied by the idling time in hours, in litres…
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EV Battery Degradation Calculator
Enter a 75 kWh battery, a 2.3% loss a year and 8 years of use to see how many kilowatt-hours and how much of a 480 km range remain, with each year's loss taken…
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EV vs gas break-even calculator
Compare a 30 MPG gas car with an EV using 30 kWh per 100 miles: enter both prices and energy rates, and see how many miles, and at 12,000 miles a year how many…
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EV home vs public charging cost calculator
Multiply a 75 kWh battery by your home rate and by the public charger's rate to see what a full charge costs at each, the gap between them, the cheaper source…
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EV range from battery and efficiency calculator
With 72 kWh of usable battery and 180 Wh per mile, an electric car travels 400 miles. Enter the energy you can really use, say whether consumption is per mile…
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Speed at redline per gear calculator
With a 6,500 rpm redline, a 3.73 final drive and 650 mm tyres, a sixth gear of 0.7 tops out at a theoretical 305.014836 km/h.
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Tire tread life calculator
With 6 mm of tread, a 1.6 mm wear-out limit and a measured wear of 0.0004 mm per mile, you have 4.4 mm and 11,000 miles left.
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Towing and payload capacity calculator
A vehicle rated to tow 6,500 lb pulls a 5,100 lb trailer with 1,400 lb to spare, yet only 500 lb of its 1,800 lb carrying capacity is left once tongue weight…
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Aircraft endurance calculator
With 180 US gallons of usable fuel burning 48 gallons an hour and a 45-minute reserve, you have 3 hours of flight endurance, 3.75 hours in total.
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Aircraft fuel burn calculator
A 2.5-hour flight burning 48 US gallons an hour needs 120 gallons of trip fuel, plus 36 for a 45-minute reserve: 156 in total, with 3.25 hours of endurance.
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EV fast charge time with taper
Charging a 75 kWh pack from 10% to 80% at 150 kW takes 21 minutes, because that band stays below the taper; go past 80% and the calculator adds the minutes lost…
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EV time to full charge calculator
A 75 kWh pack at 20 % on a 50 kW charger needs about 100 minutes to reach full: one hour at peak power, then a slower final stretch above 80 %.
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Required Rate of Climb Calculator
At 120 knots over the ground, a 3.3% climb gradient demands just over 2 metres per second of vertical speed.
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Runway wind components calculator
A 20-knot wind from 240 degrees on runway heading 270 arrives 30 degrees off the nose from the left, giving 10 knots of crosswind plus a headwind.
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Top of descent calculator
From 35,000 ft down to 3,000 ft on a 3° path at 280 knots, start descending about 100 nautical miles out and you level off in 21 min 32 s.
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True airspeed from indicated airspeed calculator
At 120 knots indicated, 8,000 ft pressure altitude and 5 °C, true airspeed comes out at an estimated 140.93 knots, since air 6 °C warmer than standard lifts…
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Aircraft weight and balance calculator
Empty weight, front seats, fuel and baggage add up to 2,130 lb and a moment of 186,200, which puts the CG inside an 82 to 95.5 envelope and under a 2,550 lb…
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Boat fuel consumption calculator
A 90-nautical-mile run at 18 knots takes five hours, so engines burning 12.5 litres an hour use 62.5 litres, also shown as 16.511 US gallons and 13.748 imperial…
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Total flight time with layovers calculator
A 150-minute flight, a 75-minute connection and a 210-minute flight add up to 7 h 15 min of travel, of which 6 h are in the air.
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True ground track from heading calculator
Heading 90° at 120 knots with wind from 270° at 30 knots gives a ground track of 90° and a ground speed of 150 knots.
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Lighthouse geographic range calculator
A light 40 m above the sea, seen from an eye height of 2 m, first rises over the horizon at about 14.9 nautical miles.
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Speed Over Ground with Current Calculator
A boat making 6 knots due east through a 2-knot current setting south moves over the ground at 6.324555 knots, on a course a little south of east.
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TAS from Mach and temperature calculator
Mach 0.82 at minus 56.5 °C is about 470 knots true, because the speed of sound in that cold air is only around 295 m/s.
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Tide Height Rule of Twelfths Calculator
With high water of 5.8 at 06:00 and low water of 1 at 12:00, the falling tide stands at 4 by 08:30, four and a half twelfths of the range later.
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Altitude sickness risk calculator
Sleeping at 3,500 m after starting at 1,200 m, with a 2-day ascent and a previous bout of AMS, rates as very high risk: 1,150 m gained per day, with at least 5…
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Excess baggage fee calculator
A 27.5 kg suitcase on a 23 kg allowance is 4.5 kg over, and the calculator prices that excess per kilogram or as one fixed overweight fee, so you can decide…
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Beaufort wind scale calculator
Enter 18 knots and you get Beaufort force 5, a fresh breeze with moderate waves, many whitecaps and some spray, worded the way marine forecasts and logbooks say…
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Boat ETA from Speed Calculator
Leave at 14:30 UTC with 42.5 nautical miles to go at 8.5 knots and you arrive at 19:30 UTC, exactly five hours later.
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Frequent-flyer miles earned
Fly 2,500 miles at a 100 % accrual rate with a 25 % status bonus and you earn 3,125 miles. Enter the fare or distance, your program's earning rate and your…
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Travel per diem calculator
A five-day trip at a daily allowance of 120, with 75% paid on the departure and return days, counts 4.5 reimbursable days and pays 540.
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Sail Area to Displacement Ratio Calculator
A boat with 500 square feet of working sail and 12,000 pounds of loaded displacement has an SA/D of 15.263, in the low band of conservative sail power.
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Trip budget by days calculator
Multiply four daily rates, for lodging, food, local transport and activities, by 7 days and get one trip total plus a subtotal per category, so you see which…
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Award ticket fuel surcharge calculator
120,000 points plus 172.8 in taxes and an 850 fuel surcharge for 2 travelers means 1,022.8 in cash at checkout, or 60,000 points and 511.4 each.
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Currency exchange amount calculator
Enter the rate you were quoted, such as 0.92 euros per dollar, then add a markup on the rate and a fee on the result: you see the effective rate, the fee and…
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Drive vs fly cost comparison calculator
A 720-mile trip at 30 mpg burns 24 gallons shared by the whole car, while airfare is multiplied by every traveler: see both totals, the cheaper option and the…
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Flight price per mile calculator
Spread a fare over the distance actually flown: a 2,450-mile route also counts as 3,942.8928 km, and you get the price per mile and per kilometer side by side.
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