How to Split a Bill With Tip Fairly: 3 Easy Methods
Two ways to split a restaurant bill: evenly, or by what each person ordered. How to share tax and tip fairly, with a worked example and rounding tips.
Travel
Travel
Compare the assumptions behind journey costs, fuel use, driving distances, and travel times. Try the fuel cost calculator, trip cost calculator, or distance calculator. Actual routes, traffic, prices, and fees can change your final cost.
Travel
How to Calculate Travel Time (Distance, Speed, Time)
How to calculate travel time: divide distance by average speed. 300 km at 75 km/h takes 4 hours. Learn to convert decimal hours and add a real-world buffer.
Travel
How to Calculate Average Speed
How to calculate average speed: divide total distance by total time. 150 km in 2 hours is 75 km/h. Learn why you cannot just average two speeds.
Travel
How to Calculate Fuel Cost for Any Trip
Fuel cost in every unit system – km/l, l/100km, mpg – with the mpg conversion constants and a realistic-consumption margin.
Travel
Straight-Line vs Driving Distance: What Is the Difference?
The Pythagorean and haversine formulas, why driving distance is always longer, and which distance you actually need.
Travel
How to Budget a Road Trip (With a Worked Example)
Five cost categories, a worked example, per-person splits, and why fuel is the smallest – not biggest – line.