Free Online Converters – Units, Numbers to Words & More
Quick conversions you'd otherwise search for one at a time: kilograms to pounds, centimetres to inches, a cheque amount written out in words, a Roman numeral or a binary number.
Every converter works instantly as you type and runs entirely in your browser, so it keeps working even on a slow connection once the page has loaded.
Number to Words Converter
Spell out any number or money amount in words using lakh and crore or million and billion style. Cheque mode ends the line with “only”, and the words can be written in five languages.
Unit Converter
Switch between units of length, weight, temperature, area, volume, speed, time and digital storage in one unit converter. Each pair shows its formula plus a quick table of common values.
Kg to Lbs Converter
Change kg to lbs or pounds back to kilograms using the exact international factor of 0.45359237. A quick table covers typical body and luggage weights, and stone, ounces and tola sit in the same list.
Cm to Inches Converter
Turn cm to inches, or inches to centimetres, with the exact 2.54 factor and the formula displayed under the answer. Heights can be typed or shown in feet and inches as well.
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit and back with the formula shown for each direction, handy for checking homework. A reference table lists body, fever, weather and cooking temperatures, and Kelvin is included too.
Feet to Meters Converter
Convert feet to meters, including heights typed as feet plus inches, using the exact 0.3048 factor. Room and plot sizes can be switched to square feet, square meters, acres or hectares.
Km to Miles Converter
Go from km to miles, or miles to kilometres, using the international mile of 1.609344 km. The quick table lists race distances like 5K, 10K and the marathon, and speeds convert between km/h and mph.
Roman Numeral Converter
Translate numbers into Roman numerals and read Roman numerals back as numbers, both at the same time. Each result is broken down step by step, and invalid forms like IIII or IC get a clear correction.
Binary, Decimal & Hex Converter
Convert a value between binary, octal, decimal and hexadecimal simultaneously, with no rounding on very large numbers. Bits can be grouped into nibbles or bytes, and two's complement is shown at 8 to 64 bits.
Time Zone Converter
Compare a time across cities and time zones with a converter that accounts for daylight saving on the date you pick. A meeting planner colours working hours and night for every city in your list.
Excel to CSV
Export an Excel workbook to CSV, picking a single sheet or bundling every sheet into one ZIP. Long account numbers keep all their digits, and comma, semicolon or tab separators are available.
CSV to JSON
Turn CSV into JSON as an array of objects keyed by the header row, or plain arrays when there is no header. Numbers and booleans can be typed automatically, and row errors point to the line to fix.
Word to PDF
Convert a Word document in DOCX format to PDF in your browser, keeping headings, lists, tables and pictures. Choose A4 or US Letter with Word-style margins, and the PDF contains real, searchable text.