How to add feet and inches with fractions (job-site examples)

Adding 6′ 3-1/2″ + 2′ 9-3/4″ on scrap paper causes mistakes. Walk through clear feet-inch-fraction examples and how Fraction Calculator: Quick Tap does the arithmetic the way the tape reads.

Key takeaways

• Keep feet, inches, and fractions aligned instead of converting everything to decimals first.
• Carry inches to feet when totals pass 12.
• Round to the tape mark you will actually cut (1/16, 1/8, etc.).
• Fraction Calculator: Quick Tap supports all four operations with precision control.

Why decimals slow trades math

Tapes speak fractions. Converting to decimals mid-cut invites rounding errors. Better to add feet and inches with fractions in place.

Example approach

• Add feet to feet.
• Add inches and fractional inches.
• Convert excess inches into feet.
• Round to the nearest cut mark you need.

Faster on your phone

Fraction Calculator: Quick Tap accepts tape-style entry and rounds from 1/2 through 1/64. Get it on Google Play.

FAQ

How do you add feet and inches with fractions?

Add feet, then inches and fractional inches, carry every 12 inches into an extra foot, and round to your cut precision.

What calculator do carpenters use for fractions?

Fraction Calculator: Quick Tap by Knox Studios is built for feet-inch-fraction arithmetic on Android.

Can it multiply and divide too?

Yes. It supports add, subtract, multiply, and divide with rounding controls.

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Originally published at knoxstudios.net.