Are these unit converters accurate?

Yes. Each unit is defined by one verified factor relative to a base unit (square metres for area, seconds for time, metres for length, and so on), and every result is computed from those factors rather than stored as a rounded number. A build-time accuracy check re-verifies the factors and their round-trips on every release.

Do I have to be online, or install an app?

Neither. The conversion runs in JavaScript inside your browser, so it works with no account and no upload. The site is also a Progressive Web App, so once a page has loaded it keeps working offline.

Why do some Indian land units show different values for different states?

Units such as bigha, biswa, katha and dhur were never standardised nationally — a bigha in Punjab is not the same size as a bigha in West Bengal. Rather than publish a misleading national average, those pages list the accepted value for each state.

Is my data or the numbers I convert sent anywhere?

No. Nothing you type is transmitted to a server or logged. All calculation happens locally on your device.

Unit Converters

Accurate, privacy-friendly converters — everything runs in your browser.

Converter

Area Converter

Indian land units (marla, gaj, kanal, killa, bigha, biswa, katha, dhur) plus square feet, square metre, hectare, are and decare — with per-state values for the units that vary by region.

Converter

Time Converter

Nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days and weeks — including the much-searched milliseconds-to-minutes conversion. Exact factors.

Converter

Length Converter

Metres, kilometres, centimetres, feet, inches, miles and nautical miles, plus traditional units — hand, span, finger, cubit, rod/pole, link and chain.

Converter

Volume Converter

Millilitres, litres, cubic metres, cubic inches and feet, plus US & imperial gallons, quarts, pints, cups, fluid ounces, tablespoons, bushels and barrels.

Converter

Energy Converter

Energy & work units — joules, kilojoules, megajoules, watt-hours, kilowatt-hours, calories, kilocalories, BTU, foot-pounds, newton-metres and MeV. Convert kJ to kWh, J to Nm, ft-lb to Nm and more.

Converter

Speed Converter

Convert between speed units.

Converter

Angle Converter

Convert between angle units.

Converter

Data size Converter

Convert between data size units.

Converter

Temperature Converter

Convert between temperature units.

Developer

Number, Text & Data

Hex/decimal/binary/octal number bases, text ↔ binary/hex/ASCII, and CSV ↔ JSON / JSON → HTML.

How these unit converters work

Every converter here works the same way: type a value, choose a from and a to unit, and the answer updates as you type. There is no button to press and nothing is uploaded — the maths runs in JavaScript inside your browser, so conversions are instant, work offline once the page has loaded, and keep your numbers on your own device.

Accuracy comes from defining each unit once, relative to a single base unit — square metres for area, seconds for time, metres for length, and so on — and computing every result from those exact factors instead of storing a rounded number for each pair. That is why marla → gaj always returns exactly 30.25 and milliseconds → minutes always divides by exactly 60,000.

Choose a converter

Area & land is the most-used family on the site. It covers Indian land units — marla, gaj, kanal, killa, bigha, biswa, katha and dhur — alongside square feet, square metres, hectares and acres. Because several of those units vary by state, their pages show per-state values rather than one national figure; the Indian land units by state guide explains the history behind that.

The remaining families cover everyday and technical needs: length & distance, volume & capacity, time, temperature, speed, energy & work, angle & rotation and data size. If you need number bases, text encodings or data formats instead, see number, text & data conversions.

Frequently asked questions

Are these unit converters accurate?: Yes. Each unit is defined by one verified factor relative to a base unit (square metres for area, seconds for time, metres for length, and so on), and every result is computed from those factors rather than stored as a rounded number. A build-time accuracy check re-verifies the factors and their round-trips on every release.
Do I have to be online, or install an app?: Neither. The conversion runs in JavaScript inside your browser, so it works with no account and no upload. The site is also a Progressive Web App, so once a page has loaded it keeps working offline.
Why do some Indian land units show different values for different states?: Units such as bigha, biswa, katha and dhur were never standardised nationally — a bigha in Punjab is not the same size as a bigha in West Bengal. Rather than publish a misleading national average, those pages list the accepted value for each state.
Is my data or the numbers I convert sent anywhere?: No. Nothing you type is transmitted to a server or logged. All calculation happens locally on your device.