Home › Tools › Add fractions › 11/16 + 3/4

11/16" + 3/4"

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

11/16" + 3/4" =

=1-7/16"

Sum

1-7/16"

Decimal inch

1.4375"

Millimetres

36.5125 mm

11/16" − 3/4"

-0-1/16"

The work

Over a common denominator

Put both over 16: 11/16 = 11/16 and 3/4 = 12/16. Add the tops: 11/16 + 12/16 = 23/16, which carries past one inch. Reduced, that's 1-7/16" (1.4375 inches). TapeMath tracks it as an exact fraction, so it lands dead on the tape mark.

Keep going

11/16" to decimal 3/4" 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 →