If the units you request are inconsistent with the original units, the
number will be converted into your units times whatever ``remainder''
-units are left over. For example, converting @samp{55 mph} into acres
+units are left over. (This can be disabled; @pxref{Customizing Calc}.)
+For example, converting @samp{55 mph} into acres
produces @samp{6.08e-3 acre / m s}. (Recall that multiplication binds
more strongly than division in Calc formulas, so the units here are
acres per meter-second.) Remainder units are expressed in terms of
The ``remainder unit'' @samp{cm} is left alone rather than being
changed to the base unit @samp{m}.
-If you want to disallow using inconsistent units, you can set the
-customizable variable @code{calc-ensure-consistent-units} to @code{t}
-(@pxref{Customizing Calc}). In this case, if you request units which
-are inconsistent with the original units, you will be warned about it
-and no conversion will occur.
-
You can use explicit unit conversion instead of the @kbd{u s} command
to gain more control over the units of the result of an expression.
For example, given @samp{5 m + 23 mm}, you can type @kbd{u c m} or
to have, then for the new units. (If the value on the stack can be
simplified so that it doesn't contain any units, like @samp{ft/in} can
be simplified to 12, then @kbd{u c} will still prompt for both old
-units and new units. You can ignore the prompt for old units with
-@key{RET}, or turn off the prompt by setting the customizable variable
-@code{calc-allow-units-as-numbers} to @code{nil};
-@pxref{Customizing Calc}.) Assuming the old and new units you give are
-consistent with each other, the result also will not contain any
-units. For example, @kbd{@w{u c} cm @key{RET} in @key{RET}} converts
-the number 2 on the stack to 5.08.
+units and new units. This can be disabled; @pxref{Customizing Calc}.)
+Assuming the old and new units you give are consistent with each
+other, the result also will not contain any units. For example,
+@kbd{@w{u c} cm @key{RET} in @key{RET}} converts the number 2 on the
+stack to 5.08.
@kindex u b
@pindex calc-base-units