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Free tools for everyone.

Calculators, converters, file tools and developer utilities — for your money, your health, your documents and your code. Everything runs in your browser, and every answer shows how it was worked out.

  • 120 tools
  • 12 languages
  • 0 numbers sent to a server
Degrees

Tape

    Your calculations are listed here. Select one to use it again.

    Every tool

    Finance

    12

    Loans, mortgages, investing, retirement and pay.

    All 12 tools

    Tax

    20

    Income tax and take-home pay in 16 countries.

    All 20 tools

    Health

    8

    Body weight, energy, pregnancy and what to eat.

    Math

    20

    Fractions, percentages, algebra, geometry and statistics.

    All 20 tools

    Everyday

    14

    Dates, time, school, travel, home and conversions.

    All 14 tools

    Files

    11

    PDF, images and QR codes, all in your browser.

    All 11 tools

    Text

    4

    Change case, clean up lists, slugs and Markdown.

    Developer

    19

    Everyday tools that run entirely in your browser.

    All 19 tools

    Network

    12

    Your IP, DNS records, domains and blacklists.

    All 12 tools

    Your numbers stay with you.

    Every calculation runs in your browser, so nothing you type is sent to a server. And every answer shows how it was worked out, step by step.

    How we handle your data