Back to school calculators
Shown Aug–Sep
Latest update:
Back to school tools
Backpack Weight CalculatorCheck a loaded school backpack against a child's body weight using the AAP 15% guidance, with a category label and a recommended pack-weight range in kg or lb.School Supplies Budget CalculatorAdd a per-student school supplies list with quantities and unit prices, then see the total cost, remaining budget, and any overage.Percentage CalculatorCalculate percent of a number, what percent one value is of another, and percent change with clear formulas, examples, domains, and interpretation.Fraction CalculatorAdd, subtract, multiply, and divide fractions with simplified results, mixed numbers, decimal values, denominator rules, and worked examples.Weighted GPA CalculatorCalculate weighted and unweighted GPA from course grades and credits using clearly stated illustrative bonuses for honors and AP or IB courses.Age CalculatorCalculate exact age in years, months, and days from a birth date to any age-at date, plus total months, weeks, days, weekday born, and next birthday.Time Converter: Seconds, Minutes, Hours, Days, WeeksConvert seconds, minutes, hours, days, weeks, average months, or average years into any other supported time unit, with exact factors, worked examples, and calendar caveats.Study Time CalculatorPlan study sessions, breaks, long breaks, and review time from your available hours, study method, subject complexity, energy level, and custom focus lengths, with Pomodoro-style schedules included.Reading Time CalculatorEstimate reading time from word count, words per minute, and content type, with effective speed and approximate page count.Book Challenge CalculatorPlan a yearly, monthly, or custom reading challenge by estimating books you can finish or daily time needed from pages, speed, genre, and duration.
Frequently asked questions
- Which calculators help with school supplies and grades?
- The School Supplies Budget Calculator adds a per-student supplies list with quantities and unit prices, then shows the total cost, remaining budget, and any overage. For grades, the Percentage Calculator finds a percent of a number, what percent one value is of another, and percent change, while the Fraction Calculator adds, subtracts, multiplies, and divides fractions with simplified results, mixed numbers, and decimal values. The Weighted GPA Calculator turns course grades and credits into weighted and unweighted GPA using its stated illustrative honors and AP or IB bonuses.
- How do I plan study and reading time?
- The Study Time Calculator plans study sessions, breaks, long breaks, and review time from your available hours, study method, subject complexity, energy level, and custom focus lengths, with Pomodoro-style schedules included. The Reading Time Calculator estimates reading time from word count, words per minute, and content type, with effective speed and approximate page count. The Book Challenge Calculator plans a yearly, monthly, or custom reading challenge by estimating books you can finish or the daily time needed from pages, speed, genre, and duration.
- Which calculator checks a loaded backpack?
- The Backpack Weight Calculator checks a loaded school backpack against a child's body weight using the AAP 15% guidance, with a category label and a recommended pack-weight range in kg or lb.
- What do the age and time tools cover?
- The Age Calculator works out exact age in years, months, and days from a birth date to any age-at date, plus total months, weeks, days, the weekday born, and the next birthday. The Time Converter converts seconds, minutes, hours, days, weeks, average months, or average years into any other supported time unit, with exact factors, worked examples, and calendar caveats.