Home › Tools › Add fractions › 1/4 + 1/2

1/4" + 1/2"

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" + 1/2" =

=0-3/4"

Sum

0-3/4"

Decimal inch

0.75"

Millimetres

19.05 mm

1/4" − 1/2"

-0-1/4"

The work

Over a common denominator

Put both over 4: 1/4 = 1/4 and 1/2 = 2/4. Add the tops: 1/4 + 2/4 = 3/4. Reduced, that's 0-3/4" (0.75 inches). TapeMath tracks it as an exact fraction, so it lands dead on the tape mark.

Keep going

1/4" to decimal 1/2" to decimal All fraction sums Add it on the calculator

The same math, offline

Every calc, on your tape measure — even with no signal.

TapeMath for iPhone runs this exact engine offline, adds rafters, stairs, studs, pitch and a paperless tape, and the key layout your thumbs already know. $9.99 once — no subscription, ever.

See the app

Coming soon — TapeMath is in final App Review. Meanwhile, use the free web calculator →