Home › Tools › Add fractions › 1/4 + 11/16

1/4" + 11/16"

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" + 11/16" =

=0-15/16"

Sum

0-15/16"

Decimal inch

0.9375"

Millimetres

23.8125 mm

1/4" − 11/16"

-0-7/16"

The work

Over a common denominator

Put both over 16: 1/4 = 4/16 and 11/16 = 11/16. Add the tops: 4/16 + 11/16 = 15/16. Reduced, that's 0-15/16" (0.9375 inches). TapeMath tracks it as an exact fraction, so it lands dead on the tape mark.

Keep going

1/4" to decimal 11/16" 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 →