Mathematics
Percentage calculator
Calculate percentage increase, decrease, parts and totals.
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Mathematics
Percentages, statistics, scientific calculation and random numbers.
Mathematics
Percentage calculator
Calculate percentage increase, decrease, parts and totals.
Mathematics
Scientific calculator
Evaluate scientific expressions, powers, roots and trigonometry.
Mathematics
Statistics calculator
Calculate mean, median, mode, variance and standard deviation.
Mathematics
Random number generator
Generate random integers, decimals and simple lists.
Conversions
Length units and practical conversions.
Dates and time
Age, dates, durations and hours.
Work and salary
Work hours, salary conversion and gross pay estimates.
Energy
Electricity usage, kWh costs and appliance comparisons.
Health
General estimates for BMI, calories and cycles.
Health
BMI calculator
Estimate body mass index from height and weight.
Health
Calorie calculator
Estimate daily calorie needs from body data and activity.
Health
Due date calculator
Estimate a pregnancy due date from common dating methods.
Health
Ovulation calculator
Estimate ovulation and fertile window dates from cycle data.
Education
Grades, weighted averages and exam goals.