Other calculators

Useful calculators that don't fit anywhere else.

Time and date math, randomness, passwords, games, and miscellaneous calculators that are genuinely useful but don't fit a single category.

Calculators
33
Topics: All Time & Date (1) Randomness (1) Games (6) Tech (16)
33 results
Other

Final Grade Calculator

Find the percentage you need to score on the final exam to finish a course with a target overall grade.

basic
10,829 4.4 1 min
Other

Cat Years Calculator

Estimate the human-equivalent age of a cat using the standard veterinary mapping (15 + 9 + 4 per year afterwards).

basic
5,899 4.5 1 min
Other / Time & Date

Days Until Date Calculator

Count the number of days, weeks, months, and years between today and any chosen date — past or future.

basic
7,275 3.9 1 min
Other / Tech

Roman Numeral Converter

Convert between Arabic numbers (1–3,999) and Roman numerals — the calculator detects the direction automatically.

basic
1,403 4.9 1 min
Other / Tech

Color Converter

Convert a color between hex, RGB, and HSL representations and read its relative luminance for accessibility.

basic
18,647 4.3 1 min