Handy tools, zero friction
75 free calculators and converters for health, finance, dates, text, math, car costs and more. No sign-up, no clutter.
BMI Calculator
Body Mass Index, metric & imperial.
Health Stats Suite
BMI, TDEE & ideal weight in one tool.
Calorie Calculator
Daily calorie needs by activity level.
BMR Calculator
Calories burned at rest.
Ideal Weight
Healthy weight range for your height.
Body Fat Calculator
US Navy method body fat estimate.
Water Intake
Daily hydration needs by weight.
Due Date Calculator
Pregnancy due date & week estimator.
Pomodoro Timer
Focus intervals with audio alerts.
Mortgage Calculator
Monthly payments and total cost.
Annuity Mortgage
Fixed payment with amortisation schedule.
Linear Mortgage
Fixed principal, decreasing monthly cost.
Annuity vs Linear
Side-by-side mortgage comparison.
Early Payoff Calculator
Extra payments save time and interest.
Rent vs Buy Analyzer
Net worth comparison over your horizon.
Loan Calculator
Monthly payments and total interest.
Compound Interest
Savings growth with compound returns.
Tip Calculator
Split bills and calculate tips.
Discount Calculator
Final price and savings after discount.
VAT Calculator
Add or remove VAT/sales tax instantly.
Salary Calculator
Annual, monthly, weekly & hourly pay.
Currency Converter
Live exchange rates, 30+ currencies.
Percentage Calculator
% of, what %, and % change.
Age Calculator
Exact age and birthday countdown.
Date Difference
Days, weeks, months between dates.
Countdown Timer
Count down to any date or event.
Days Until
Countdown to Christmas, birthdays & more.
Timezone Converter
Convert times between cities worldwide.
Stopwatch
Precision stopwatch with lap times.
What Day Was I Born?
Birth weekday, age in days & birthday countdown.
How Old in Days?
Age in days, weeks, hours — live counter.
Weeks Until Christmas
Live countdown to Christmas & any event.
Business Day Calculator
Working days with holiday exclusions.
Word Counter
Words, characters, sentences & reading time.
Case Converter
UPPER, lower, Title, camelCase & more.
Password Generator
Cryptographically secure passwords.
Lorem Ipsum Generator
Placeholder text by words or paragraphs.
URL Encoder / Decoder
Encode and decode URL strings.
JSON Formatter
Prettify, minify and validate JSON.
Hash Generator
MD5, SHA-1, SHA-256 from any text.
Markdown Previewer
Write Markdown, see live HTML preview.
Text Diff Checker
Compare two texts, highlight differences.
Reading Time Estimator
How long to read any text.
Image to Base64
Convert images to Base64 data URIs.
UUID Generator
RFC 4122 v4 UUIDs, generate in bulk.
CSV to Table
View and sort CSV as a filterable table.
Privacy Blur
Blur or redact images, fully client-side.
QR Code Generator
QR codes for URLs, text, WiFi & more.
JS & CSS Minifier
Minify JavaScript and CSS code.
SQL Formatter
Format and beautify SQL queries.
HTML Minifier
Compress HTML by stripping whitespace.
Base64 Encode/Decode
Encode text to Base64 or decode it.
HTML to Markdown
Convert HTML to clean Markdown.
Regex Tester
Test regex patterns with live highlighting.
JWT Decoder
Decode JWT tokens and view claims.
Timestamp Converter
Convert Unix timestamps to readable dates.
URL Slug Generator
Convert text to URL-safe slugs.
Cron Expression Builder
Build and decode cron schedules.
JSON ↔ YAML
Convert between JSON and YAML.
XML Formatter
Format and validate XML.
PHP Unserializer
Decode PHP serialize, JSON & Base64 strings.
Color Converter
HEX ↔ RGB ↔ HSL with live swatch.
Scientific Calculator
Trig, log, sqrt, factorial and more.
Fraction Calculator
Add, subtract, multiply & divide fractions.
Random Number
Dice roller and random number generator.
Number Base Converter
Binary, Octal, Decimal, Hexadecimal.
Roman Numeral Converter
Numbers ↔ Roman numerals, 1–3,999.
GPA Calculator
GPA from grades and credit hours.
Standard Deviation
Mean, variance & std dev from a dataset.
Aspect Ratio Calculator
Scaled dimensions for images and video.
Decision Maker
Random picker with weighted spin animation.
Unit Converter
Length, weight, temperature, speed & more.
Shoe Size Converter
US, UK, EU, JP shoe sizes.
Clothes Size Converter
US, UK, EU clothing sizes.
Fuel Economy Converter
MPG, L/100km and km/L with cost.
Car Loan Calculator
Monthly payment & amortisation schedule.
Road Trip Calculator
Fuel cost and per-person split.
Tyre Size Calculator
Decode and compare tyre markings.
Parking Cost Calculator
True annual cost of parking.
EV Economy Tracker
Wh/km, mi/kWh, range and charging cost.
EV vs Petrol TCO
5 & 10 year total ownership cost comparison.
Cups to Grams
Density-aware baking converter, 40+ ingredients.
Recipe Scaler
Scale any recipe up or down.
Oven Temperature
°C, °F, Gas Mark and Fan oven.
Screen Resolution
Your viewport, pixel ratio & device info.
Car Ownership Cost
Total true cost of owning a car over 1–10 years.
Car Affordability
How much car can you afford? 20/4/10 rule check.
Fuel Cost Calculator
Annual, monthly & trip fuel spend.
Car Depreciation
Year-by-year value loss with depreciation chart.
EV vs Petrol TCO
Trip cost + 5/10yr total ownership comparison.
EV Economy Tracker
Wh/km, mi/kWh, range and charging cost.
Fuel Economy Converter
MPG, L/100km, km/L — with annual cost calculator.