Unit Converters

Length Converter

Meters, feet, inches, kilometers

Cm to inches Converter

Centimetres to inches, with the exact 2.54 factor and a 1 to 100 cm table

Inches to cm Converter

Inches to centimetres, with the exact 2.54 factor and a 1 to 100 inch table

Kg to lbs Converter

Kilograms to pounds, using the exact 0.45359237 definition and a 1 to 100 kg table

Lbs to kg Converter

Pounds to kilograms, using the exact 0.45359237 definition and a 1 to 100 lb table

Celsius to Fahrenheit Converter

Celsius to Fahrenheit with the exact 1.8 and 32 formula, negatives, and a 1 to 100 table

Fahrenheit to Celsius Converter

Fahrenheit to Celsius with the exact (°F - 32) ÷ 1.8 formula, negatives, and a 1 to 100 table

Feet to meters Converter

Feet to metres using the exact 0.3048 international foot and a 1 to 100 ft table

Miles to km Converter

Miles to kilometres with the exact 1.609344 factor and a 1 to 100 mile table

Mm to inches Converter

Millimetres to inches with the exact 25.4 factor and a 1 to 100 mm table

Litres to gallons Converter

Litres to US and Imperial gallons with exact factors and a 1 to 100 L table

SI Prefix Converter

Convert between pico, nano, micro, milli, kilo, mega, giga and tera and all other SI prefixes exactly

Weight Converter

Kilograms, pounds, ounces, grams

GSM to oz/yd² Fabric Weight

gsm, oz/yd² and oz/ft², denim and canvas weights

Paper Weight Converter (gsm to lb)

Convert paper weight between gsm and pounds for bond, text, cover, index, bristol and watercolour stock.

SMD Resistor Code Calculator

3-digit, 4-digit, R and EIA-96 codes

Temperature Converter

Celsius, Fahrenheit, Kelvin

Volume Converter

Liters, gallons, milliliters, cups

Cooking Converter

Cups, tablespoons, teaspoons, ml

Pressure Converter

psi, kPa, bar, atm, mmHg

Kids Clothing Size by Height & Age

EU/UK, US and shoe size from height or age

Data Storage Unit Converter

Bits, bytes, KB, MB, GB, TB and binary KiB, MiB, GiB, TiB in one table

TB to TiB Converter

TB to TiB and why a 1 TB drive shows about 931 GB in Windows

Mbps to MB/s Converter

Megabits to megabytes per second and back, plus Gbps, kbps and MiB/s

Download Time Calculator

Download or transfer time from file size and speed in Mbps or MB/s, with an efficiency setting

Cloud Backup Upload Time Calculator

Days for a first cloud backup from data size, upload Mbps and hours per day

Video File Size from Bitrate Calculator

Video file size and GB per hour from video and audio bitrate and duration

Monthly Data Usage Budget Calculator

Streaming hours against a monthly data cap using Netflix published GB per hour

USB, SATA and Ethernet Transfer Time Comparison

Best-case copy time over USB 2.0 to USB4, SATA III and Gigabit to 10 Gigabit Ethernet

Recipe Scaler

Free recipe scaler. Enter your ingredient list with the original serving count and the servings you need, and get every quantity recalculated instantly.