Everyday Utility Calculators: Grades, Tips, Sizing and Sleep
Small calculations come up constantly: what grade do you need on the final, how to split a bill, which size to order, when to go to bed to wake up refreshed. These tools answer them in a couple of clicks.
6 free everyday utility calculators
Grade Calculator
Weighted average grade across assignments, quizzes and exams.
Open calculator →Bra Size Calculator
Estimate a US bra size from underbust and bust measurements.
Open calculator →Shoe Size Conversion
Convert a shoe size between US Men's, US Women's, UK and EU.
Open calculator →Tip Calculator
Tip amount, total bill, and the split per person.
Open calculator →Golf Handicap Calculator
Simplified handicap index estimate from your recent round scores.
Open calculator →Sleep Calculator
Suggested bed/wake times aligned to full 90-minute sleep cycles.
Open calculator →Frequently asked questions
Do I need to create an account?
No. Every calculator is free and works instantly in your browser.