What it does
CalculatorSoup groups fraction, percentage, statistics, financial and practical calculators alongside a familiar arithmetic keypad.
CalculatorSoup combines a basic arithmetic keypad with subject worksheets. Its Time to Decimal tool takes separate hours, minutes and seconds and returns decimal hours, total minutes and total seconds, with worked unit-conversion steps. It uses 60 minutes per hour and 60 seconds per minute and rounds to at most six decimal places. This keeps an entry such as 2:45 distinct from 2.45 hours. The homepage keypad supports keyboard, pointer and touch input and performs that arithmetic locally in JavaScript. The time page offers a share control and a website-calculator link; other worksheets have their own inputs and rules.
Strengths
- Dedicated fraction and time tools
- Basic keypad supports keyboard and pointer input
Best for
- Arithmetic checks and working with mixed units of time
Sources
- Calculators | Calculator Soup (Oct 26, 2026)
- Time to Decimal Calculator - CalculatorSoup (Oct 26, 2026)