Frequently asked questions

Units Verse is a free online unit converter covering length, weight, temperature and 30+ measurement categories, with instant results, formulas, charts and conversion tables.

Enter a value and choose your units — Units Verse converts it instantly in your browser using exact, SI-anchored conversion factors, updating as you type and in either direction.

Yes. Every converter and conversion page is completely free, with no ads and no usage limits.

No. Units Verse requires no account or login — just open a converter and start converting.

Yes. There is no sign-up at all; every feature works immediately and anonymously.

Very accurate. Conversions use exact, definition-based factors anchored to the International System of Units (SI) and high-precision arithmetic, and you can display up to ten decimal places.

Metric (SI), imperial and US customary units are all supported, including distinctions such as US versus UK gallons.

More than 30 categories, including length, weight, temperature, area, volume, speed, time, pressure, energy, power, data, and many engineering, electrical and scientific units.

Yes. You can convert metric to imperial instantly, such as centimetres to inches or kilograms to pounds.

Yes. Convert imperial to metric just as easily, such as miles to kilometres or pounds to kilograms.

Yes. Scientific categories include angle, frequency, angular velocity, illuminance and luminous flux, with more added over time.

Yes. Engineering categories include pressure, force, torque, energy, power, density, flow rate and electrical units.

Yes. Convert voltage, electric current, resistance, capacitance, inductance, conductance and electric charge.

Yes. The volume converter handles cooking measures such as cups, tablespoons, teaspoons, millilitres and fluid ounces.

Yes. Convert Celsius, Fahrenheit, Kelvin and Rankine, including Celsius to Fahrenheit and back.

Yes. Convert pascals, bar, psi, atmospheres, torr, inches of mercury and more.

Yes. Convert newtons, pound-force, dynes, kilogram-force and more.

Yes. Convert joules, calories, kilowatt-hours, BTU, electronvolts and more.

Yes. Convert watts, kilowatts, megawatts, horsepower and BTU per hour.

Yes. Convert metres per second, kilometres per hour, miles per hour, knots and Mach.

Yes. Convert bits, bytes, kilobytes, megabytes, gigabytes and binary units such as kibibytes and gibibytes.

Yes. Convert bits and bytes per second, including Mbps and MB/s.

Yes. Convert miles per gallon (US and UK), litres per 100 km and kilometres per litre.

Yes. Convert volume flow rate (for example litres per second) and mass flow rate (for example kilograms per hour).

Yes. Convert hertz, kilohertz, megahertz, gigahertz and RPM.

Yes. Convert degrees, radians, gradians, arcminutes, arcseconds and revolutions.

Yes. Convert lux, kilolux and foot-candles.

Yes. Convert lumens, kilolumens and millilumens.

Yes. Convert newton-metres, foot-pounds, inch-pounds and more.

Yes. Convert kilograms per cubic metre, grams per cubic centimetre, pounds per cubic foot and more.

Viscosity is not a dedicated category yet, but it is on our roadmap; we add new categories regularly.

Radiation units are planned but not yet available; we are expanding categories continually.

Magnetism units are planned for a future update and are not yet available.

Typography units such as points and picas are planned but not yet available.

Yes. Every converter includes a batch mode where you paste a list of values and convert them all at once.

Yes. Batch conversion turns a pasted column of values into a full results table you can export.

Yes. Batch results and conversion tables can be exported to CSV.

Yes. Conversion tables can be downloaded as a CSV file with one click.

Yes. Every conversion table has a print option that opens a clean, printable view — which you can also save as a PDF.

Yes. A copy button places the result on your clipboard instantly.

Yes. Every conversion has a shareable URL that restores the exact units and value.

Yes. Save any conversion to your favourites and find them again on the Favourites page.

Yes. Your recent conversions appear on the homepage and are stored privately on your device.

Yes. Open the search palette (press “/” or Ctrl/Cmd + K) and type natural queries like “10 cm to inches”.

Yes. Toggle light or dark mode from the header; your choice is remembered.

Yes. After your first visit, Units Verse works offline as a Progressive Web App.

Yes. The interface is mobile-first and adapts to any screen size.

Yes. It is fully responsive and works on tablets, phones and desktops.

All modern browsers, including Chrome, Edge, Firefox and Safari.

Yes. You can install it to your home screen and use it offline.

Regularly. We add units, categories and improvements on an ongoing basis.

Formulas are derived from official, definition-based conversion factors anchored to SI; see our methodology page for details.

We follow the SI (BIPM), NIST guidance and ISO/IEC 80000; binary data units follow IEC 80000-13. See our sources page.

Yes. Every category is defined against SI base or derived units.

Metric is a decimal system where units scale by powers of ten, while imperial uses traditional ratios such as 12 inches per foot. See our metric vs imperial guide.

Some units share a name but differ in size — notably the US gallon (3.785 L) versus the UK/imperial gallon (4.546 L). See our US vs UK gallon guide.

Temperature uses an offset as well as a scale factor, for example °F = °C × 1.8 + 32. See our temperature scales guide.

Because most unit relationships are not whole numbers; results are shown with sensible precision and rounded for readability.

Yes. A precision control lets you display from 0 up to 10 decimal places without changing the underlying calculation.

Usually because of rounding or a different unit definition (for example US versus UK gallon); Units Verse uses exact, SI-anchored factors.

Units Verse is highly accurate, but for safety-critical engineering work you should independently verify results, as noted in our disclaimer.

Yes for general use; for research-grade work, confirm against the definitional source and mind significant figures.

Yes. It is ideal for students and teachers, with formulas, worked examples and step-by-step explanations.

Yes. It is suitable for professional and everyday use; verify safety-critical results independently.

Yes. It is free to use for personal, business and commercial purposes.

Yes; for published research, cite the underlying standards and check significant figures.

Yes. Every conversion page shows the exact formula used.

Yes. Each page includes a plain-English explanation and step-by-step working.

Yes. Pages include multiple worked examples for common values.

Yes. Each conversion includes a visual chart of the relationship between the two units.

Yes. Every conversion includes a reference table you can print or export.

Yes. Email accuracy@unitsverse.com with the page and the expected value; we review every report.

Yes. Send suggestions through our contact page.

Yes. Tell us the category and units via the contact page and we will evaluate adding it.

Use the contact page or email hello@unitsverse.com.

Report bugs through the contact page; screenshots and steps help us fix them quickly.

No. Conversions run in your browser and we do not require an account or collect personal data.

Only local storage for your preferences, favourites and history; optional, privacy-conscious analytics cookies may be used if enabled. See our cookie policy.

Yes. Your conversions and preferences stay on your device and are never sent to our servers.

No. Units Verse is completely ad-free.

Units Verse is currently a free, ad-free tool built as a public utility.

A public API is planned but not yet available.

Not yet — the developer API is on our roadmap.

An embeddable widget is planned; it is not available yet.

It is fast, free, ad-free and accurate, works offline, and pairs every result with a formula, examples and a table.

No ads, no reloads, instant bidirectional conversion, natural-language search, and genuinely useful, well-explained pages.

Errors in conversions can cause costly or dangerous mistakes in cooking, engineering, medicine and travel, so precision matters.

A unit converter is a tool that changes a measurement from one unit to another, such as centimetres to inches.

Unit conversion is expressing the same quantity in a different unit using a conversion factor.

Multiply by the conversion factor between the units, or use a converter that does it instantly; see our how-to-convert guide.

SI units are the International System of Units — the modern metric standard, with base units such as the metre, kilogram and second.

Imperial units are a traditional British system that includes inches, feet, miles, pounds and gallons.

US customary units are the system used in the United States — similar to imperial but with some different sizes, such as the gallon.

A conversion factor is the fixed ratio between two units, for example 1 inch = 2.54 cm.

Open Units Verse, type your value, pick the units, and get an instant result — no sign-up needed.

Units Verse aims to be the best: free, ad-free, accurate, fast and offline-capable across 30+ categories.

Results update live as you type, in both directions, so conversion is instant.

Yes. It is free to use anywhere, with no restrictions.

Yes. It works on phones, tablets and computers, and can be installed as an app.

Bookmark Units Verse and check back; we add categories and features regularly.

Yes. We are actively expanding, including planned categories such as viscosity, radiation and magnetism.