Unit Converter
Convert length, weight and temperature without leaving the page.
Convert units
Supported conversions
Length includes metres, kilometres, centimetres, millimetres, inches, feet, yards and miles. Weight includes kilograms, grams, pounds and ounces. Temperature supports Celsius, Fahrenheit and Kelvin.
Worked examples to check your result
Use these small calculations as sanity checks after choosing the same category and units in the converter.
- Length: 1 mile = 1.609344 kilometres. The mile is 1,609.344 metres, so converting it to kilometres divides by 1,000.
- Weight: 500 grams = 0.5 kilograms. A kilogram contains 1,000 grams, so half a kilogram is 500 grams.
- Temperature: 0°C = 32°F = 273.15 K. Temperature conversions use both a scale factor and an offset, unlike length and weight conversions.
Temperature formulas
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32. To convert Celsius to Kelvin, add 273.15. For a conversion in the opposite direction, the tool first resolves the input to Celsius and then calculates the target unit.
Choose the correct quantity
This page converts length, weight and temperature only. It does not convert area, volume, speed, pressure or data storage. For example, 1 square metre is not 1 metre, and a cubic metre requires a volume conversion rather than a length factor. Use a dedicated converter whenever the quantity includes squared or cubed units.
The result is calculated locally in your browser. Keep the original value and unit beside the converted value when copying it into a form, design, recipe or technical note; that makes it easier to spot a unit-selection mistake later.
Related unit conversion tools
Useful pages connected to the same task.
How the conversion categories differ
Length conversions use fixed scale relationships between units such as metres, kilometres, feet and miles. Weight conversions similarly use defined relationships between kilograms, grams, pounds and ounces. Temperature is different because Celsius, Fahrenheit and Kelvin use both a scale relationship and an offset.
For temperature, first convert the source value to Celsius and then convert from Celsius into the requested unit. This matters because adding or multiplying a temperature by the wrong factor can produce a plausible-looking but incorrect result. The calculator keeps the operation local in the browser so the result does not depend on a remote conversion service.
Check the unit before you check the number
A numerically correct result can still be the wrong answer when the original quantity is misclassified. Confirm whether you are converting a length, area, volume, mass or temperature. Square and cubic units do not use the same factors as ordinary length units, so this page should not be used as a substitute for a dedicated area or volume conversion formula.
For technical or engineering work, keep the source unit, target unit and original value with the converted result. That small record makes the calculation easier to audit later and reduces mistakes when the same number is reused in another document.
Choose units that match the quantity
A unit conversion changes how a measurement is expressed, not the thing being measured. Ten centimetres and 100 millimetres describe the same length; kilograms and pounds describe mass; Celsius and Fahrenheit describe temperature using different scales. Before converting, check both the quantity and the unit labels. A number without its unit can be misleading when copied into a form, spreadsheet or technical note.
A practical conversion workflow
- Identify the measurement and its current unit.
- Select the destination unit that the form, plan or recipient expects.
- Enter the numeric value and review the displayed result and unit labels together.
- Keep sensible precision: a longer decimal does not mean the original measurement was more accurate.
A recipe, shipping label or engineering drawing may require different units. Celsius and Fahrenheit use different zero points and scale steps, so temperature conversion is not a simple multiplication.
Benefits and limits
Having common conversions in one place helps reduce mental arithmetic and makes values easier to compare when collaborating across countries or industries. It is still important to verify the category and the requested precision before using the result. Specialist fields may also use their own rounding rules.
Unit conversion questions
Why can a result have many decimal places?
The calculation may retain mathematical precision, but the source value may have been rounded. Use precision appropriate to the measuring instrument and the task.
Can I convert unlike quantities?
No meaningful conversion exists between different physical quantities, such as length and mass. Choose units from the same quantity category.
How to use Unit Converter for everyday work and study
Unit Converter is designed for freelancers preparing files or measurements for a client, remote teams working across different conventions, and students translating values between units or formats. For Unit Converter, the real benefit comes from applying the output correctly, not merely seeing a number or transformed value. For Unit Converter, enter source information carefully, then read the output in light of the assumptions that produced it. Use Unit Converter as a focused browser step when a quick check would otherwise mean setting up a separate spreadsheet.
Worked example: Unit Converter
Confirm the physical quantity and source unit before selecting a target unit. Similar labels can describe different dimensions, such as mass versus force or energy versus power, and converting between them requires more than changing the unit label. Keep the original number, unit symbol, and rounding precision in technical notes.
Start with the inputs, not the answer
Before running Unit Converter, review the fields it actually uses, such as dates, units, text, quantities, or settings. A freelancer using Unit Converter can document a quote, invoice, proposal, delivery estimate, or other client-facing result with the inputs that produced it. For a remote team, Unit Converter can help inspect the input before it is translated into the team's agreed format or workflow. After completing the underlying work, students can use Unit Converter to check one specific part of the answer without replacing their own reasoning. For Unit Converter, an incorrect source value can still produce a misleading output, so review the original fields before relying on the result.
A practical US workflow
When a US freelancer uses Unit Converter, retaining the source value beside the output makes the check easier to explain later. For Unit Converter, note its relevant input, such as an amount, duration, text sample, unit, or setting, next to the output that the page returns. A remote teammate can document how Unit Converter was used in a project ticket, letting colleagues repeat the same steps. For coursework, Unit Converter works best alongside the original exercise: compare both to catch arithmetic, formatting, or conversion mistakes without skipping the learning step. Keeping the inputs with Unit Converter's output gives a client or teammate a trail to review instead of a number with no explanation.
When the result needs a second check
If Unit Converter is used for a contract, tax return, payroll choice, school requirement, or another consequential task, verify the result independently before relying on it. Unit Converter can speed up a routine calculation or transformation, but it cannot infer special project assumptions or know every change made by an outside authority. Before acting on Unit Converter's result, check its inputs, reproduce important figures independently, and ask the responsible organization about official requirements. Unit Converter is a practical utility, not a substitute for professional advice or an official record.
Tips for repeat use
- For Unit Converter, choose a unit and rounding convention and apply it consistently across the task.
- Save the inputs used by Unit Converter alongside its output whenever a client or teammate may ask how the result was reached.
- Only provide Unit Converter with information required for its task; leave out client secrets and unrelated confidential details.
- When sending a Unit Converter result to a client, label estimates clearly and state the assumptions that matter.
- For an assignment involving Unit Converter, follow the instructor's rules about permitted calculators, outside assistance, and submitted work.
Limitations and privacy
What Unit Converter returns depends on the information supplied and the method implemented on this page. Unit Converter may not cover every unusual input, local requirement, product-specific convention, or future change. If Unit Converter displays live or external data, check the stated source and timestamp instead of assuming the value stays current. For sensitive work, use the minimum information necessary. The best way to use Unit Converter is to understand the assumptions and verify consequential outputs rather than treating convenience as official authority.
Page-specific reference: Unit Converter. This guide explains practical cases for Unit Converter, including the points where its result needs independent confirmation.
Frequently asked questions about Unit Converter
What is Unit Converter used for?
Unit Converter helps complete the specific task represented by its fields and output. Use Unit Converter as a routine check, then confirm that its output matches the real-world task and assumptions you intended to evaluate.
Can freelancers use Unit Converter for client work?
A freelancer can use Unit Converter while preparing routine client work, but any quoted amount, converted asset, or consequential output should be checked against the client's assumptions before delivery.
Can students use Unit Converter?
A student can use Unit Converter to check a worked attempt when course rules permit outside tools. When using Unit Converter for coursework, students should show their own reasoning and comply with the instructor's submission requirements.
Is the result an official or professional determination?
No. The output from Unit Converter is informational, not an official determination. For consequential use of Unit Converter, confirm regulated decisions, formal requirements, and professional advice with the appropriate authority or qualified professional.
What should I do if the result looks wrong?
If Unit Converter produces an unexpected result, check its inputs, units, dates, and rounding settings. For an important Unit Converter result, reproduce the output independently and compare methods before relying on it.