Explore calculators in this category.
Compare cash fares against award tickets to reveal the dollar value of your airline miles.
Compare an annual lounge membership with pay-as-you-go access. Enter the yearly pass price, what you would pay per visit (including guest fees), how many guests you usually bring, and the value you assign to food and drinks to learn the break-even visit count.
Check what percentage of your body weight your backpack represents for safer travel.
Calculate how much you'll pay for overweight luggage based on airline fee per kilogram.
Split a bill evenly with an optional tip.
See how long your next marathon session will take.
Discover how likely it is that people in a group share a birthday using the classic probability puzzle.
Estimate book pages from total word count.
Estimate how long a candle will burn by dividing its wax weight by the average burn rate.
Convert your cat's age to the equivalent human age using a veterinary guideline.
Compute the number of citations per page to evaluate referencing density in legal briefs, academic papers, or policy reports.
Calculate water needed for a coffee brew ratio.
Determine how much water to use for a given amount of coffee grounds and desired brew ratio.
Adjust conventional recipe times for convection ovens.
Compare daily drink spending with the package price to see whether a cruise drink bundle pays off.
Divide total trip budget by days to plan daily spending.
Find the probability of rolling a specific value at least once with multiple dice. Enter sides and number of dice, then press Calculate.
Check whether your income and savings meet a destination's digital nomad visa rules and how long it will take to build any missing buffer.
Compute the sale price after applying a percentage discount.
Enter the observer's height to approximate the distance to the horizon using Earth's curvature.
Convert a dog's age to an equivalent human age.
Convert earthquake magnitude to energy in joules.
Calculate staff turnover percentage over a period.
Check the flat-rate payment you could claim when an EU or UK carrier arrives late. Provide the great-circle distance of the disrupted itinerary and the total hours delayed on arrival; the calculator applies the official EU261/UK261 brackets to reveal the headline compensation amount.
Enter energy consumption per 100 km and electricity cost to estimate driving cost per kilometer.
Estimate the carbon dioxide emissions generated by a flight based on distance traveled.
Calculate cost per mile from fuel price and mileage.
Calculate the probability of at least one successful grant when submitting multiple applications.
Plan hiking itineraries with Naismith's rule using distance and elevation gain.
Approximate a horse's age in human years using a common rule of thumb. Enter the horse's age and press Calculate.
Project the extra cash needed to unlock hotel elite status via nights and spend requirements.
See how many hotel nights your budget can cover.
Evaluate how much each hotel loyalty point is worth by dividing the cash price of a stay by the number of points required.
Estimate how many free nights you can redeem by dividing your total points by points required per night.
Estimate the total yarn length needed for a knitting project.
Calculate the combined water and electricity cost of washing one load of laundry in your home.
Approximate how far lightning struck by multiplying the seconds until thunder by the speed of sound in air (0.343 km/s).
Calculate the expected monetary value of a lottery ticket.
Calculate the probability of winning by matching all numbers in a lottery draw.
Calculate airline volumetric weight from bag dimensions.
Convert a measured length on a map to real-world distance using the map scale.
Enter the number of pills you have and how many you take per day to find out how long your supply will last. Useful for planning refills and managing prescriptions.
Estimate maximum occupants based on room area.
Estimate the length of paper on a roll.
Estimate number of parking spaces based on floor area.
Degrees per slice of pizza.
Approximate CO₂ emissions using 0.0044 kg per printed page.
Estimate total wait time in a single-file queue by multiplying people ahead by service time per person.
Approximate a rabbit's age in human years using a factor of eight.
Chance of winning a single-draw raffle.
Estimate reading time from word count.
Estimate how long a standard 500-sheet ream of paper will last given your daily printing volume.
Multiplier to scale ingredient quantities.
Measure the monthly savings or extra cost of working remotely by comparing commute spending with home office expenses.
Score needed on the final to reach a target grade.
Determine readable font size for academic posters using viewing distance.
Estimate the carbon dioxide emissions of a road trip by combining distance, vehicle efficiency, and fuel emission factor.
Estimate how many refueling stops are needed on a road trip when starting with a full tank.
Calculate how many rest stops are needed on a road trip based on your maximum comfortable driving distance per leg.
Quickly approximate toll costs by multiplying trip distance by an average rate per kilometer.
Calculate OSHA incident rate per 100 workers.
Calculate how long a shadow will be based on object height and sun elevation angle.
Estimate water used during a shower.
Determine how many paid ski days it takes for a season pass to break even compared to buying day tickets. Enter the price of the pass and the average walk-up ticket cost.
Determine how much additional weight you can pack before hitting your luggage limit.
Calculate floor area allocated to each employee.
Track progress toward your daily step goal.
Estimate stickers per sheet before printing.
Estimate how long sunscreen protects you by multiplying your unprotected burn time by the SPF value.
Estimate an eco-conscious trip budget by combining transport, lodging, meals, experiences, and carbon offsets.
Convert beats per minute into milliseconds per beat for music production.
Evaluate the carbon emissions of a trip by multiplying distance with an emission factor for the chosen mode.
Spread a trip budget over travel days.
Enter travel distance and an emission factor per kilometer to estimate total carbon emissions.
Get a rough estimate of travel insurance cost using trip price, traveler age, and trip length. This is a simplified model for planning purposes.
Estimate trees needed to offset CO₂ emissions.
Share expenses fairly by dividing the total trip cost by the number of travelers.
Estimate daily words based on typing speed.
Divide your total travel budget by trip length to set a daily spending limit for meals, activities, and extras.
Estimate perceived temperature from wind.
