Fraction math the way a tape measure reads.

1 3/8 + 3/4 is 2 1/8, not 2.1249999. Dividers is a set of pocket calculators for the bench: fractions, golden ratio and box proportions.

Coming soon to the App Store

Three tools you reach for at the bench.

Native on iPhone, iPad and Mac. No accounts, no ads, no internet required.

Separate keypads for the whole number, numerator and denominator, so you enter 5 3/8 the way you read it. The math is exact.

Round to the nearest 1/2 through 1/128, up or down. When a result is rounded, Dividers shows which way and by how much.

Enter the long side, short side or total and get the other two, with a dimensioned drawing.

Height, width and depth from golden, root-rectangle, Palladian, Fibonacci and maker-inspired sets, with a 3D preview you can spin.

On Mac and iPad, type 5 space 3 / 8 for 5 3/8. Copy results with ⌘C.

Dividers works offline and has no accounts, analytics or tracking. History is forgotten when you quit.

Found a bug, have a question or want a feature? Open an issue on GitHub and I'll take a look. You can also browse existing Dividers issues.