When to use it
Use it when drawings, datasheets, field measurements, and formulas use different systems—for example millimeters and inches, bar and psi, newton-meters and pound-feet, or Celsius and Fahrenheit.
Engineering Unit Calculator
Convert length, pressure, torque, temperature, and more for CAD and engineering.
Everything runs in your browserNo account requiredPrivacy-firstv1.0.0Updated Aug 5, 2026
Everything is calculated in your browser. Nothing you enter is sent anywhere.
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Dimension
Everything is calculated in your browser.
Convert
10 units available
10 units available
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About the engineering unit calculator
Convert between common engineering and CAD units across length, area, volume, mass, force, pressure, torque, speed, temperature, angle, and power. Search units by name, symbol, or alias.
How it works
Each dimension uses a base unit (or Kelvin for temperature). Values convert through that base, then into your target unit. Changing the from-unit within a dimension preserves the physical quantity by recalculating the displayed value.
Precision
Results are formatted with up to 12 significant digits, trimming trailing zeros. Very large or very small values may be shown in scientific notation when needed.
Limits
Conversions are deterministic and based on standard conversion factors. Temperature uses absolute-scale formulas. Cross-dimension conversions (for example length to mass) are not supported.
Privacy first
All calculations run locally in your browser. Nothing you type is sent to a Dockzio server.
Practical guidance
Convert units without losing the physical quantity
The calculator converts within one engineering dimension at a time. A correct conversion preserves the quantity while changing only its numerical representation and unit.
Worked example
A pressure of 6 bar converts to 600 kPa and approximately 87.02 psi. If that value feeds a force calculation, convert the area into a compatible unit system before multiplying; a correct pressure conversion cannot repair mismatched downstream units.
Method and precision
Linear dimensions convert through a defined base unit. Temperature uses offset-aware formulas through an absolute scale rather than a simple multiplier. Results retain calculation precision and format up to 12 significant digits, but displayed digits do not imply measurement accuracy.
Edge cases and verification
Area and volume factors are squared or cubed, gauge and absolute pressure are different quantities, and mass is not force. Confirm the source-unit meaning, preserve significant figures from the least-precise input, and independently verify safety-critical conversions.
FAQ
Quick answers to common questions.
Length, area, volume, mass, force, pressure, torque, speed, temperature, angle, and power.
No. The calculator only converts within the same dimension — for example length to length, not length to mass.
Conversions use standard factors and significant-digit formatting. Temperature uses absolute-scale math via Kelvin.
No. Conversions run entirely in your browser.
Learning Center
Guides related to Engineering Unit Calculator
Short explainers that pair well with this tool — concepts first, then practice.
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