engineering Calculator

Universal Multi-Unit Engineering Converter

Instantly convert between Imperial, US Customary, and Metric SI units across Length, Mass, Temperature, Pressure, and Speed.

Audited by UniqCalc Methodology Team • Formula Checked • Free & No Registration Required

Verified Mathematical Model & Formulation

Metric = Imperial × Conversion Factor
°C = (°F - 32) × 5/9
1 lb = 0.453592 kg | 1 ft = 0.3048 m | 1 PSI = 0.0689476 bar

Performs scientific unit conversions using exact BIPM (International Bureau of Weights and Measures) and NIST constants.

Configurable Parameters & Standard Units

  • Unit Category (1=Length, 2=Mass/Weight, 3=Temperature °C/°F, 4=Pressure Bar/PSI, 5=Speed kmh/mph): (Default: 1 count)
  • Input Value to Convert: (Default: 100 count)

Standard Worked Example & Practical Verification

Scenario: Converting 100 kg freight mass to imperial pounds, ounces, and metric tonnes.

Calculated Solution
220.46 lbs (3,527.4 oz / 0.10 Tonnes)

Practical Takeaway: Exact conversions eliminate rounding discrepancies in shipping and manufacturing.

Frequently Asked Questions

How do you convert Celsius to Fahrenheit quickly in your head?

Multiply Celsius by 2, subtract 10% of that result, and add 32. For exact formula: (°C × 9/5) + 32 = °F.

How many pounds are in 1 kilogram?

Exactly 2.20462262 pounds per kilogram according to the international avoirdupois pound standard.

What is 1 bar in PSI?

1 bar equals approximately 14.5038 pounds per square inch (PSI).