Unit Converters
Free unit converters for length, weight, temperature, speed, area, volume, power, time and currency — see every unit at once.
16 tools
Unit Converter
Convert length, weight, temperature, volume, area, speed and data units instantly.
Unit Converters
Digital Storage Converter
Convert between bits, bytes, KB, MB, GB, TB and binary KiB/MiB/GiB.
Unit Converters
Cooking Measurement Converter
Convert cooking volumes between cups, tablespoons, teaspoons, ml and more.
Unit Converters
Length Converter
Convert between metres, feet, inches, miles and more — see every unit at once.
Unit Converters
Weight Converter
Convert between kilograms, pounds, ounces, stones and more.
Unit Converters
Temperature Converter
Convert between Celsius, Fahrenheit and Kelvin.
Unit Converters
Speed Converter
Convert between km/h, mph, m/s, knots and ft/s.
Unit Converters
Area Converter
Convert between square metres, square feet, acres, hectares and more.
Unit Converters
Volume Converter
Convert between litres, gallons, millilitres, cups and more.
Unit Converters
Power Converter
Convert between watts, kilowatts, horsepower and BTU/h.
Unit Converters
Angle Converter
Convert between degrees, radians, gradians and more.
Unit Converters
Time Unit Converter
Convert between seconds, minutes, hours, days, weeks and years.
Unit Converters
Currency Converter
Convert between 30+ currencies with live exchange rates.
Unit Converters
Historical Currency Converter
Convert currencies using the ECB exchange rate from any past date (back to 1999).
Unit Converters
Frequency & Wavelength Converter
Convert between frequency and wavelength using the speed of light.
Unit Converters
Shoe Size Converter
Convert shoe sizes between US, UK, EU and centimetres for men, women and kids.
Unit Converters
Browse other categories
Finance and Loans
Free finance and loan calculators — work out EMI, monthly payments, simple and compound interest, amortization and the true cost of borrowing.
24 tools
Investment
Plan your investments with free calculators for SIP, compound growth, ROI, CAGR, retirement, savings goals and long-term wealth building.
21 tools
Business and Ecommerce
Free business and ecommerce calculators for profit margin, markup, break-even, ROAS, CPM, conversion rate, AOV and unit pricing.
33 tools
Real Estate
Free real estate calculators for mortgage payments, home affordability, down payment, rent vs buy, rental yield and cap rate.
14 tools
Insurance
Free insurance calculators to estimate life cover, term premiums, human life value, health insurance costs and claim amounts.
5 tools
Health and Nutrition
Free health and nutrition calculators for BMI, daily calories, BMR, TDEE, macros, body fat, ideal weight and water intake.
18 tools
Fitness
Free fitness calculators for calories burned, one-rep max, running pace, TDEE, body fat and training targets — fast and private.
12 tools
Mathematics
Free math calculators for percentages, fractions, averages, statistics, ratios, combinations, scientific notation and more.
39 tools
Education
Free education calculators for GPA, grades, study time and exam scores to help students plan and track their progress.
5 tools
Date and Time
Free date and time tools to calculate age, durations, days between dates, business days, the day of the week and time zones.
16 tools
Text and Writing
Free text tools to count words, change case, remove duplicates, find and replace, check readability and clean up your writing.
26 tools
Developer Tools
Free developer tools to format, minify, validate and encode — JSON, CSS, regex, base64, JWT, hashes, cron and HTML utilities.
57 tools
SEO and Website Tools
Free SEO and website tools to generate meta tags, Open Graph, Twitter cards, FAQ schema, robots.txt, slugs and SERP previews.
15 tools
Image Tools
Free image tools to compress, resize, crop, convert and extract colours — all processed privately in your browser, no uploads.
22 tools
PDF and File Tools
Free PDF and file tools to merge PDFs, split pages and convert documents right in your browser — private, with nothing uploaded.
12 tools
Security and Privacy
Free security and privacy tools to generate strong passwords and passphrases, hash text, check password strength and validate cards.
9 tools
Travel and Vehicle
Free travel and vehicle calculators for fuel cost, fuel economy, trip distance, speed and time, and auto loan payments.
9 tools
Random Generators
Free random generators — numbers, dice rolls, coin flips, name pickers, colours, passwords and UUIDs, all quick, fair and private.
8 tools
Productivity
Free productivity tools including a Pomodoro timer, stopwatch, countdown, QR code generator and everyday helpers to save you time.
26 tools
Science and Engineering
Free science and engineering calculators for Ohm's law, force, density, energy, pressure, resistor colour codes and conversions.
27 tools