Free Online Calculators

Determine if you can afford to leave your job based on your finances, expenses, and alternatives.

Calculate how much emergency savings you need to cover unexpected expenses like job loss, medical bills, or car repairs.

Determine how long your backup power will last during an outage and what you need to improve your system.

Calculate food and water supplies needed for emergency preparedness.

Calculate your exact age in years, months, days, hours, and minutes.

Calculate days between dates, add or subtract days, weeks, months, or years from a date.

Add or subtract hours, minutes, and seconds. Convert between time units.

Calculate total hours worked, overtime, and pay based on start and end times.

Calculate the score needed on your final exam to achieve your desired grade.

Understand how different assignments affect your overall course grade.

Track your attendance percentage and see how it impacts your overall grade.

Convert between raw scores, percentages, and letter grades for academic assessments.

Helps students estimate loan repayment amounts and schedules.

Helps students manage expenses and plan their finances.

Helps students allocate study hours efficiently across subjects.

Suggests study/break intervals based on the Pomodoro Technique.

Converts SAT scores to ACT equivalents and vice versa.

Calculate your Grade Point Average (GPA) for school or college.

Calculate your monthly mortgage payment with additional costs like property taxes and insurance.

Calculate the right tip amount and split the bill among friends.

Calculate fuel costs and mileage for trips and daily commutes.

Calculate growth of investments over time with compound interest.

Calculate loan payments, interest costs, and amortization schedules for any type of loan.

Calculate car loan payments and see how much interest you'll pay over the life of the loan.

Calculate simple and compound interest for investments and loans.

Calculate how much you need to save for retirement and see if you're on track.

Create amortization schedules for loans showing payment breakdown by principal and interest.

Calculate future value of investments with regular contributions and compound interest.

Calculate the impact of inflation on purchasing power over time.

Convert hourly wages to annual salary or annual salary to hourly rate with detailed tax calculations.

Calculate your Body Mass Index (BMI) to check if your weight is healthy.

Calculate your daily calorie needs based on your age, weight, height, and activity level.

Calculate your body fat percentage using various methods like skinfold, navy method, and BMI.

Calculate your Basal Metabolic Rate (BMR), the number of calories your body needs at rest.

Calculate your ideal weight based on height, age, gender, and body frame using multiple methods.

Calculate due date, conception date, and important milestones during pregnancy.

Calculate your estimated due date based on last menstrual period or conception date.

Calculate percentages, percentage change, and percentage difference between two numbers.

A comprehensive scientific calculator with advanced math functions.

Perform arithmetic operations with fractions - addition, subtraction, multiplication, and division.

Calculate the properties of a triangle using sides, angles, area, and more.

Calculate standard deviation, variance, mean, and other statistical measures from a data set.

Generate random numbers within a range, with options for duplicates and sorting.

Calculate subnet masks, network addresses, and IP ranges for network planning.

Generate secure, random passwords with customizable options for length and character types.

Convert between different units of measurement for length, weight, volume, temperature, and more.

Solves equations, factors polynomials, and finds roots.

Calculates motion, force, energy, and other physics concepts.

Provides atomic mass, electron configuration, and other properties of elements.

For chemistry concentration calculations.