Free Online Tools & Calculators

Handy calculators for astronomy and astrology, math practice, energy planning, and email templates — plus a blog on technology and programming.

HTML Email Template Generator

Easy-to-use tool to generate HTML email templates.

Choose a month and year to view the moon phases for each day.

Choose a month and year to view sunrise and sunset times for each day.

Choose a month and year to view Rahu Kaalam — a period each day considered inauspicious.

Choose a month and year to view the Tithi and Paksha for each day — key inputs for selecting a muhurta.

Choose a month and year to view the nakshatra — the lunar zodiac of Vedic astrology — for each day.

Generate addition, subtraction, linear equation, and quadratic equation problems with solutions.

Estimate annual energy use and cost to operate household appliances.

Read the latest technology and computer programming articles.