🍌 Real-world scale
Everyday Object Comparator
A number is easier to judge when you can see it. Enter a measurement and compare it with bananas, buses, bathtubs, football pitches, blue whales and other familiar objects.
About the Everyday Object Comparator
Numbers without a physical anchor are hard to judge. A mass of 150,000 kg means little until you picture a blue whale; 2,500,000 litres is abstract until you picture an Olympic swimming pool. This comparator converts a measurement into a count of familiar objects so the scale becomes intuitive.
Comparisons use typical values, not exact ones. A banana is about 18 cm, a London bus about 11 metres, a bathtub about 150 litres and a football pitch about 7,140 square metres. Real examples vary: a banana might be 15 to 25 cm, and a bus might be 9 to 13 metres depending on the model. The counts are therefore good for intuition, not for engineering.
The headline result picks the object whose count is closest to one on a logarithmic scale. If you enter 2 metres, the comparator prefers a door (about one door) over a banana (about eleven bananas), because one door is the more natural description. The full table still shows every object in that category, so you can choose the comparison that makes sense to you.
The same idea works for speed and time. A motorway car at 30.6 m/s is about one high-speed train at 97 m/s? No: it is about a third of one, which is why the comparator would instead say it is about 2.2 city cars. Time comparisons are useful for planning: a 7,200-second task is about one feature film, or 2.5 workdays.
How the calculation works
- Base value = input value × the factor for the chosen unit.
- Equivalent count = base value ÷ the object's typical size in the same base unit.
- Closest object = the object with the smallest absolute base-10 logarithm of its count.
- Length uses metres, mass kilograms, volume litres, area square metres, speed metres per second and time seconds.
- The table reports counts to six significant figures; the headline rounds for readability.
Reference values
| Category | Base unit | Objects compared |
|---|---|---|
| Length | metre | Rice grain, credit card, banana, door, bus, pitch, Eiffel Tower, marathon, Earth |
| Mass | kilogram | Paperclip, battery, apple, sugar, cat, human, car, elephant, blue whale |
| Volume | litre | Droplet, teaspoon, shot, can, wine bottle, fuel tank, bathtub, hot tub, pool |
| Area | square metre | Credit card, A4 sheet, parking space, tennis court, pitch, acre, park |
| Speed | metre/second | Snail, walker, runner, cyclist, car, train, airliner, sound, light |
| Time | second | Blink, heartbeat, song, film, workday, week, year, decade, lifespan |