Fraction Calculator
Add, subtract, multiply, and divide fractions for construction. Always rounds to the nearest 1/64 inch.
Round to
1/64
—
1/32
—
1/16
—
0
Tap to add fraction
Tip: Enter whole number first, then tap a fraction.
Example: 5 → 3/8 → + → 2 → 7/8 → =
Quick Reference
1/160.0625
1/80.125
3/160.1875
1/40.25
5/160.3125
3/80.375
7/160.4375
1/20.5
9/160.5625
5/80.625
11/160.6875
3/40.75
13/160.8125
7/80.875
15/160.9375
11.0
How to use
- Tap the whole number on the number pad (e.g., 5).
- Tap a fraction button to add the fractional part (e.g., 3/8).
- Tap an operation: +, −, ×, or ÷.
- Enter the second measurement the same way.
- Tap = to see the result as a fraction and decimal.
Examples
Example Calculations
- Adding boards: 3-1/4" + 2-7/8" = 6-1/8"
- Cutting to length: 10-1/2" − 3-3/16" = 7-5/16"
- Multiple pieces: 2-1/2" × 4 = 10"
- Dividing material: 15-3/4" ÷ 3 = 5-1/4"
Pro Tips
- • Tap a fraction button alone to enter just a fraction (e.g., 3/8")
- • Use the decimal point for precise measurements from digital tools
- • Results always simplify (4/8 becomes 1/2)