9 measurements across 4 units
Everyday objects at each inch mark, each with an exact figure, a tolerance, and a source. The cluster the whole niche competes on.
One inch is 2.54 centimetres, or 25.4 millimetres. The clearest thing that is 1 inch long is the thickness of a hockey p…
Two inches is 5.08 centimetres, or 50.8 millimetres. The easiest thing that is 2 inches long is a standard AA battery, w…
Three inches is 7.62 centimetres, or 76.2 millimetres. The clearest thing that is 3 inches long is a hockey puck, which …
How long a span in feet actually looks, measured against real reference objects instead of rough guesses.
Five feet is 60 inches, or 152 centimetres, which is 1.52 metres. The clearest thing that is 5 feet long is a standard b…
Ten feet is 120 inches, or 305 centimetres, which is 3.05 metres. The clearest thing that is 10 feet high is a basketbal…
Full metric pages, not a footnote. Each centimetre length shown with real objects and imperial parity.
Five centimetres is 50 millimetres, or 1.97 inches, which is just under two inches. The clearest thing that is 5 cm long…
Ten centimetres is 100 millimetres, or 3.94 inches, which is a tenth of a metre. The clearest thing that is 10 cm long i…
“What weighs X”, answered with things you can actually pick up, each with a sourced weight and how much it varies.
One pound is 16 ounces, or 454 grams, which is 0.45 kilograms. The clearest thing that weighs 1 pound is a block of butt…
Five pounds is 80 ounces, or 2.27 kilograms, which is about 2,268 grams. The clearest thing that weighs 5 pounds is a st…
