Suggestions for Google Calculator

General suggestions

  • Stay within unit systems. If I search for rod= or acre, give the answer in feet or square feet, not meters or square meters. If I search for 1 acre / 1 mile, say 8.25 feet instead of 2.5146 meters.
  • Output in km/h rather than m/s if the inputs are in terms of kilometers and hours or days. 800 km / 8 hours should be 100 km/h (rather than 27.77777778 m/s), but 3/5 c and 10 m / 3 s should be in m/s.
  • Parse 8 h as "8 hours", not "8 times Planck's constant". Not everyone knows what Planck's constant is or that it is represented by "h". I noticed this problem while searching for 800 km / 8 h. Strangely, 800 km / 100 km/h works as I would expect.
  • Never round aggressively. Round without explanation once (one baker's dozen in dozens), and you lose my trust whenever you output an integer (1 acre in square feet) unless I figure out your rule for when to round.


  • Floating-point arithmetic errors (1 / 0, 2 ^ 2000) should be displayed by default. Currently, they cause the calculator line to not appear, as if the calculator hadn't feature been triggered at all.
  • Unit errors should be displayed by default. Examples: 1 acre in feet, 1 meter + 2 seconds, cube root of a square mile.
  • There should be a way to see syntax errors so I'm not left in the dark when I make an error in my input and only get search results. It would make sense to use = at the end of a search for this, since = already causes questionable calculations like 1 feet= or 8 mile= and useless calculations like 6 cm= to be displayed.

New features

This is my second post about Google Calculator. My first was Units in Google Calculator.

3 Responses to “Suggestions for Google Calculator”

  1. Jirka Says:

    “Output in km/h rather than m/s if the inputs are in terms of kilometers and hours or days.”

    Or output BOTH.

  2. Joe Grossberg Says:

    I think that it should interpret “8h” as 8 hours and “8*h” as 8 times Plank’s constant.

    P.S. I see you’re using my phat MT:Powered Icon. Wanna exchange links? I already gave you one.

  3. Ned Batchelder Says:

    The rounding is partly due to how you expressed the problem:

    “one baker’s dozen in dozens” gives “one dozen”

    “1 baker’s dozen in dozens” gives “1.08333333 dozens”

    Similarly: “2+2” gives “4”, while “two plus two” gives “four”.