Free Online Converter Tools

What Each Tool Does

Every tool below opens instantly, needs no account, and processes your data locally in your browser. Here is what each one is for:

Weight

Convert kilograms, pounds, ounces, grams and stones in any direction — for shipping, cooking, fitness and travel. Open the Weight →

Length

Meters to feet, centimeters to inches, kilometers to miles — every everyday length unit in one converter. Open the Length →

Temperature

Instantly convert Celsius, Fahrenheit and Kelvin — the eternal oven-setting and weather-forecast question, solved. Open the Temperature →

Speed

Convert km/h, mph, m/s and knots — useful for travel, sports, weather and unit-confused car reviews. Open the Speed →

Area

Square meters, square feet, acres and hectares for real estate, gardening and land measurements. Open the Area →

Volume

Liters, gallons, milliliters, cups and cubic meters — liquid and dry volumes for the kitchen, lab or garage. Open the Volume →

Data Storage

Bytes to gigabytes to terabytes, in both decimal (GB) and binary (GiB) conventions, so storage math finally adds up. Open the Data Storage →

Pressure

Pascals, bars, PSI and atmospheres for tires, weather, diving and engineering checks. Open the Pressure →

Angle

Degrees, radians and gradians for geometry homework, CAD work and programming. Open the Angle →

Fuel Efficiency

MPG (US and UK), L/100km and km/L — compare cars across regional conventions without a headache. Open the Fuel Efficiency →

Roman Numerals

Convert numbers to Roman numerals and back — for dates, outlines, clock faces and movie credits. Open the Roman Numerals →

Minute to Decimal

Turn hours-and-minutes into decimal hours and back — the timesheet and payroll essential. Open the Minute to Decimal →

Time Zone

See what any time is in another city or time zone, with DST handled automatically — meeting planning without the mental math. Open the Time Zone →

Currency

Convert between world currencies using up-to-date exchange rates — quick sanity checks for shopping and travel budgets. Open the Currency →

Cooking

Cups, tablespoons, grams, ounces and milliliters, tuned for recipes — including tricky ingredient-specific volume-to-weight cases. Open the Cooking →

Shoe Size

Map shoe sizes across US, UK and EU systems for men, women and kids — order the right pair the first time. Open the Shoe Size →

Power

Watts, kilowatts and horsepower for appliances, engines, solar panels and gym equipment. Open the Power →

Typography

Convert px, pt, em, rem and percent for font sizing — the web designer's daily unit puzzle, solved instantly. Open the Typography →

Hex Calculator

Run AND, OR, XOR, addition, subtraction and multiplication on two hex numbers, with the result shown in hex, decimal and binary at once. Open the Hex Calculator →

Hex to Decimal

Convert hexadecimal values — memory addresses, color codes, byte values — into plain base-10 decimal numbers, one or many at a time. Open the Hex to Decimal →

Decimal to Hex

Convert everyday decimal numbers into hexadecimal notation for code, color pickers and low-level programming tasks. Open the Decimal to Hex →

Hex to ASCII

Decode hex byte pairs, spaced or unbroken, back into readable text — handy for reading packet captures and API payloads. Open the Hex to ASCII →

ASCII to Hex

Encode plain text into space-separated hexadecimal byte pairs, ready for a hex editor or protocol spec. Open the ASCII to Hex →

IP to Hex

Convert an IPv4 address into both packed and dotted hexadecimal form for routers, firewalls and network logs. Open the IP to Hex →

Hex to IP

Convert packed or dotted hexadecimal back into a standard, readable IPv4 address. Open the Hex to IP →

Binary to Decimal

Convert binary (base-2) strings of any length into their exact decimal equivalents. Open the Binary to Decimal →

Decimal to Binary

Convert decimal numbers into binary notation, including negative values, with no bit-shifting required. Open the Decimal to Binary →

Binary to Hex

Convert binary strings directly into hexadecimal, skipping the mental detour through decimal. Open the Binary to Hex →

Hex to Binary

Expand hexadecimal values into binary, padded to a full 4-bit group per hex digit. Open the Hex to Binary →

Binary to ASCII

Decode space-separated 8-bit binary octets back into readable text. Open the Binary to ASCII →

ASCII to Binary

Encode plain text into space-separated 8-bit binary octets, one per byte. Open the ASCII to Binary →

ASCII to Decimal

Turn plain text into a list of decimal character codes, matching the classic ASCII table for standard text. Open the ASCII to Decimal →

Bytes to ASCII

Decode a list of decimal byte values (0-255) back into readable ASCII text. Open the Bytes to ASCII →

Hours to Days

Break a number of hours into whole days plus leftover hours, with a decimal-days figure alongside. Open the Hours to Days →

Days to Hours

Combine a day count and leftover hours into one total-hours figure for payroll, SLAs and scheduling. Open the Days to Hours →

How to Choose the Right Tool

For physical units — weight, length, area, volume, speed, pressure, power, angles or temperature — pick the converter named after the quantity. Data Storage handles bytes through terabytes, Fuel Efficiency covers MPG and L/100km, and Typography converts px, pt, em and rem for designers. The Cooking Converter is tuned for kitchen measures like cups and tablespoons, Shoe Size maps US, UK and EU sizings, Roman Numerals and Minute-to-Decimal handle notation changes, and Time Zone plus Currency keep you synced with the rest of the world.

Frequently Asked Questions

How accurate are the conversions?

Physical unit conversions use standard exact factors and are accurate to more decimal places than everyday use requires. Currency rates are fetched from a live source and refreshed regularly.

Do the converters work offline?

Yes — except the currency converter (which needs current rates) and the time zone tool's initial load, everything computes locally after the page loads.

Can I convert between metric and imperial?

Yes. Every physical converter supports both systems and lets you convert in either direction.

Are these converters free without limits?

Completely — convert as many values as you like with no sign-up or caps.

Explore More WiserWork Categories

WiserWork offers 423 free browser-based tools across 26 categories — all private, all free, no sign-up required.