Fast, free tools for everyday numbers
486 unit conversions, calculators, text utilities, and word-game solvers. Instant, free, and everything runs in your browser — nothing you type ever leaves your device.
Popular conversions
486 conversions · 14 categoriesUnit converters
Length
mm · cm · m · km · in · ft · yd · mi
Weight
mg · g · kg · t · oz · lb · st
Temperature
°C · °F · K
Volume
ml · l · m³ · fl oz · cup · pt · qt · gal
Area
cm² · m² · ha · km² · in² · ft² · ac · mi²
Speed
m/s · km/h · mph · kn · ft/s
Pressure
Pa · kPa · bar · psi · atm · mmHg
Energy
J · kJ · cal · kcal · Wh · kWh · BTU
Digital Storage
bit · B · KB · MB · GB · TB · KiB · MiB · GiB
Time
ms · s · min · h · d · wk · yr
Power
W · kW · MW · hp · PS
Angle
° · rad · gon · turn
Frequency
Hz · kHz · MHz · GHz · rpm
Fuel Economy
l/100km · mpg (US) · mpg (UK) · km/l
Calculators
Percentage Calculator
All three classic percentage questions, answered live.
Tip Calculator
Bill, tip %, people — done.
Discount Calculator
Includes stacked-discount mode (20% off, then 10% off ≠ 30% off).
Date Difference
Pick two dates; we handle leap years.
Age Calculator
Birth date in, exact age out.
Compound Interest
Principal, rate, years, monthly top-up — and an honest year-by-year table.
Text tools
Word Counter
Paste or type below — counts update live.
Character Counter
Common limits: X post 280 · SMS 160 · meta description ~155 · title tag ~60.
Case Converter
Paste text, click a case. Copy the result.
Remove Line Breaks
Great for cleaning text copied from PDFs or emails.
Remove Duplicate Lines
Paste a list; duplicates vanish, order is preserved.
Reverse Text
Three modes: characters, word order, or line order.
Slug Generator
Paste a headline, get a URL-ready slug.
Lorem Ipsum Generator
Choose how much you need and copy.
JSON Formatter
Paste JSON — format, minify, or validate.
Base64 Encode / Decode
Unicode-safe in both directions.