Results update when you run the tool.
This tool processes the selected input in your browser. Review the output before relying on it; format and file behavior can vary by browser and source data.
Conversions stay local. Like other BoringToolsKit pages, this page may remember its tool name and path in local recent-tool history plus a non-identifying visited boolean described in Privacy. If you choose Save pair, unit-pair metadata is also stored on this device. Privacy-bounded aggregate interaction events may be sent, but numeric values, result contents, timestamps, and identity are not transmitted.
Use this result
Share the current inputs or ask ChatGPT to explain the calculation in context.
What does this calculator estimate?
1 mile converts to 1.609 km, 1 inch to 2.54 cm, and 100 degrees Fahrenheit to 37.8 degrees Celsius. The tool scales to a base unit and then to the target across length, area, weight, temperature, volume, speed, and pressure.
- The SI base units anchor the conversion chain (Wikipedia).
- 1 mile = 1.609344 km exactly; 1 inch = 2.54 cm exactly.
- Temperature conversions use offsets, not simple factors.
How conversion works
Every unit is defined relative to a base unit (meters, kilograms, etc.). The converter scales your value to the base, then to the target — a single consistent pipeline that handles metric, imperial, and mixed conversions.
Limitations to watch for
Temperature uses offset-based formulas (°C↔°F), not simple multiplication. Area conversions must square the length factor (1 m² ≠ 3.28 ft²). The tool's area-length mode converts between area and linear units when a material width is known.
How to use it in practice
Choose the family, enter the value, and pick from/to units. For material projects (flooring, fabric), use the area-length mode with the material width to convert between square measure and linear rolls.
['Choose the conversion family.', 'Enter the value and pick from/to units.', 'Read the converted result.']
How this calculator works
Formula
Converts between units by scaling to a base unit and then to the target (e.g., inches → meters → kilometers). Supported families: length, area, weight, temperature, volume, speed, pressure.
Worked example
1 mile converts to 1.609 km. 1 inch converts to 2.54 cm. 100°F converts to 37.8°C.
Assumptions to verify
- Standard SI-derived conversion factors are used.
- Temperature uses the standard formulas.
- Area-length conversions assume a constant width.
Frequently asked questions
How do I convert units?
Choose the family (length, weight, etc.), enter the value, pick the from/to units, and read the result.
Which units are supported?
Length, area, weight, temperature, volume, speed, and pressure — metric and imperial.
How do I convert temperature?
Use the temperature family — it applies the correct offset formulas (°C = (°F − 32) × 5/9), not simple scaling.
Why isn't 1 m² = 3.28 ft²?
Area factors square the linear factor: 1 m² = 10.764 ft². The converter handles this correctly.
What is the area-length mode?
It converts between square area and linear length when you know the material width — e.g., square feet of flooring to linear feet of a roll.
Is it accurate?
Yes — conversions go through standard base units (meters, kilograms, seconds) with precise factors.
Can I convert speed and pressure?
Yes — km/h to mph, kPa to psi, and more are included in their families.
Cite this tool
BoringToolsKit. “Unit Converter.” boringtoolskit.com/unit-conv/ (reviewed 2026-08-25). Free to reference in articles, syllabi, and answer posts with a link.
Privacy: Inputs and results stay in this browser. Any future sponsored recommendation or advertisement will be clearly labeled and kept separate from the calculation.