UtilityBaseUnit Converters
A complete set of free unit converters, each on its own page with a quick-reference table and bidirectional input. Convert length, weight, temperature, volume, cooking measures, digital storage, and more — every conversion runs instantly in your browser with no ads or sign-up. Pick the exact converter you need below.
Unit Converter
Convert length, weight, temperature, volume, speed, and data units instantly.
Calculators
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly, with a common-values reference table.
Calculators
Fahrenheit to Celsius
Convert °F to °C and back instantly, with the formula and a common-temperatures table.
Calculators
CM to Inches Converter
Convert centimeters to inches and back — edit either box, both update.
Calculators
Inches to Centimeters Converter
Convert inches to centimeters instantly, both ways, with a quick reference table.
Calculators
MM to Inches Converter
Convert millimeters to inches and back — edit either box, both update.
Calculators
CM to Feet Converter
Convert centimeters to feet and inches (and back) — ideal for height.
Calculators
Feet to Meters Converter
Convert feet to meters instantly, both ways, for height and distances.
Calculators
Meters to Feet Converter
Convert meters to feet instantly, both ways, for height and distances.
Calculators
Pounds to Kilograms Converter
Convert pounds (lb) to kilograms (kg) instantly, both ways, with a quick reference table.
Calculators
KG to LBS Converter
Convert kilograms to pounds and back — edit either box, both update.
Calculators
Ounces to Grams Converter
Convert ounces (oz) to grams (g) instantly, both ways, for cooking and postage.
Calculators
Grams to Ounces Converter
Convert grams to ounces and back — edit either box, both update.
Calculators
Miles to Kilometers Converter
Convert miles to kilometers instantly, both ways, with running and driving references.
Calculators
KM to Miles Converter
Convert kilometers to miles and back — edit either box, both update.
Calculators
Liters to Gallons Converter
Convert liters to US gallons instantly, both ways, for fuel and recipes.
Calculators
Gallons to Liters Converter
Convert US gallons to liters and back — edit either box, both update.
Calculators
Cups to mL Converter
Convert cups to milliliters and back — for recipes, using the US cup.
Calculators
Tablespoons to Cups Converter
Convert tablespoons to cups and back — 16 tbsp make a cup.
Calculators
Cooking Converter
Cups to grams and back, per ingredient — flour, sugar, butter, and 25 more.
Calculators
Data Storage Converter
Convert between bytes, KB, MB, GB, TB, and PB — with binary and decimal modes.
Developer Tools
PX to REM Converter
Convert between px, rem, and em with an adjustable base — plus bulk and a reference table.
Developer Tools
Roman Numeral Converter
Numbers to Roman numerals and back, with strict validation and a chart.
Text Tools
Number Base Converter
Convert between binary, hex, decimal, and octal — with the hand method shown.
Developer Tools
Color Converter
Convert a color between HEX, RGB, HSL, HSV, and CMYK at once, with a live swatch and copy buttons.
Image Tools
Hex to RGB Converter
Convert colors between HEX, RGB, and HSL — edit any field and the rest update.
Developer Tools
Shoe Size Converter
Convert between US Men's, Women's, UK, EU, and CM sizes — with GS equivalents.
Calculators
Salary to Hourly Converter
Convert salary to hourly and back — with weekly, biweekly, and monthly views.
Calculators
Grams to Pounds Converter
Convert grams to pounds and back instantly, with a quick-reference table.
Calculators
Pounds to Grams Converter
Convert pounds to grams and back instantly, with a quick-reference table.
Calculators
Kg to Grams Converter
Convert kilograms to grams and back — 1 kg = 1000 g.
Calculators
mL to Oz Converter
Convert milliliters to US fluid ounces and back, with a reference table.
Calculators
Oz to mL Converter
Convert US fluid ounces to milliliters and back, with a reference table.
Calculators
Inches to Feet Converter
Convert inches to feet (decimal) and back — 12 inches per foot.
Calculators
MPH to KM/H Converter
Convert miles per hour to kilometers per hour and back.
Calculators
Meters to Yards Converter
Convert meters to yards and back — 1 m ≈ 1.0936 yd.
Calculators
Kg to Stone Converter
Convert kilograms to stone and back — the UK body-weight unit.
Calculators
Stone to Pounds Converter
Convert stone to pounds and back — 1 stone = 14 pounds.
Calculators
Frequently asked questions
Are these converters accurate?
Yes — each uses the exact defined conversion factor (for example, 1 inch = 2.54 cm exactly) and computes locally in your browser. Results are rounded for readability but based on precise math.
Do the converters work both ways?
Yes. Every converter is bidirectional — edit either field and the other updates. Many also include a quick-reference table of common values for the conversion.
Is anything uploaded?
No. All conversions run entirely in your browser. Nothing you type is sent to a server, and no account is required.