Everyday Utilities Calculators
Browse everyday utilities tools. Each link opens a dedicated calculator with instructions, formulas, examples and related references.
- GPA Calculator
Calculate a weighted grade-point average from course grades and credits.
- Grade Calculator
Calculate the percentage score and letter grade from points earned and possible.
- Bra Size Calculator
Estimate a starting bra size from underbust and bust measurements; sizing varies by brand.
- Shoe Size Converter
Convert a foot length to an approximate US, UK and EU shoe-size reference.
- Tip Calculator
Calculate tip amount and split a restaurant bill among people.
- Golf Handicap Calculator
Estimate a Handicap Index from score differentials using the WHS average-of-lowest method.
- Sleep Calculator
Find suggested sleep and wake times in 90-minute planning intervals.