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1/4" + 1/4"

Adding two fractions of an inch, exactly — the everyday jobsite arithmetic that a decimal calculator gets wrong. Reduced, carried, and shown in millimetres.

1/4" + 1/4" =

=0-1/2"

Sum

0-1/2"

Decimal inch

0.5"

Millimetres

12.7 mm

1/4" − 1/4"

The work

Over a common denominator

Put both over 4: 1/4 = 1/4 and 1/4 = 1/4. Add the tops: 1/4 + 1/4 = 2/4. Reduced, that's 0-1/2" (0.5 inches). TapeMath tracks it as an exact fraction, so it lands dead on the tape mark.

Keep going

1/4" to decimal 1/4" to decimal All fraction sums Add it on the calculator

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