Calculators tools
Simple, accurate free calculators: age, percentage, BMI, BMR, calories, date difference, GPA, average, fractions, ratios and scientific maths.
Age CalculatorExact age in years, months and days on any date.
Percentage CalculatorX% of Y, percentage change, and what percent X is of Y.
BMI CalculatorBody Mass Index in metric or imperial units.
Date Difference CalculatorDays, weeks, months and years between two dates.
Add Days to DateAdd or subtract days, weeks, months or years.
Time Duration CalculatorHours and minutes between two times, or add time.
BMR & Calorie CalculatorDaily calories for your goal using Mifflin-St Jeor.
Body Fat CalculatorBody fat % from tape measurements (US Navy method).
Ideal Weight CalculatorIdeal body weight by 4 formulas plus BMI range.
Pregnancy Due Date CalculatorDue date, weeks pregnant and trimester.
Sleep CalculatorBest bedtime or wake-up time by sleep cycles.
GPA CalculatorTerm and cumulative GPA on a 4.0 scale.
Grade CalculatorWeighted grade and the score you need on the final.
Average CalculatorMean, median, mode, range and standard deviation.
Fraction CalculatorAdd, subtract, multiply and divide fractions.
Ratio CalculatorSolve A:B = C:D, simplify and scale ratios.
Scientific CalculatorTrig, logs, powers, roots, memory and history.