Tools for Woodworkers

Bench reference

Fraction, decimal, and metric converter

Move between a drawing, tape measure, and metric machine setup without doing the conversion by hand. Fractional output is rounded to a denominator you choose.

Bench calculator

Enter your measurements

No account. No upload. Your entries stay in this tab.

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Verify critical dimensions and machine setups independently before cutting project material.

01 / METHOD

How to use this calculator

  1. Enter a decimal, fraction, or mixed number.
  2. Select the unit of the entered value.
  3. Choose the maximum denominator for the rounded inch fraction.

02 / APPLICATION

Useful in the workshop

  • Read decimal plans with a fractional tape
  • Convert metric hardware dimensions
  • Round a measurement to shop precision

03 / MODEL

Assumptions

  • One inch is exactly 25.4 millimetres.
  • Fraction rounding selects the nearest increment of the chosen denominator.
  • A leading minus sign applies to the whole measurement.

04 / CHECKS

Limitations and safety

  • Rounded fractions lose precision; use the decimal result for machine settings.
  • This is dimensional conversion, not tolerance or fit advice.

Before cutting: independently verify important dimensions, angles, clearances, material behavior, and machine settings. Use safe procedures appropriate to your tools and material.

05 / QUESTIONS

Frequently asked questions

Can I enter 1 3/8?

Yes. Whole numbers, decimals, simple fractions, and mixed numbers are accepted.

What does the denominator control?

It controls the smallest displayed inch increment, such as 1/16 or 1/64.