All calculators

Estimate monthly mortgage payments with principal, interest, taxes, insurance, and loan term inputs.

Calculate fixed monthly payments, total payment, and interest for a personal, auto, or general loan.

Estimate a car loan payment with vehicle price, down payment, trade-in value, taxes, fees, rate, and term.

Calculate simple or compound interest for savings, debt, or investment examples.

Find the fixed payment needed to repay a loan over a selected term.

Project retirement savings from current age, savings, monthly contributions, expected return, and target income.

Generate a compact amortization schedule showing how each payment splits between interest and principal.

Estimate investment growth with starting balance, monthly contributions, return, and time horizon.

Estimate how inflation changes future prices and purchasing power over time.

Solve practical time-value-of-money estimates for future value, present value, and growth.

Estimate taxable income, tax, after-tax income, and monthly take-home using a simple effective tax rate.

Convert salary between hourly, weekly, biweekly, monthly, and annual pay equivalents.

Approximate the annual rate needed for a present value to reach a future value over time.

Calculate sales tax, discount-adjusted price, and final total from price, tax rate, and optional discount.

Project how savings or investments may grow with compounding, contributions, and time.

Calculate body mass index using US or metric units and see the standard BMI category.

Estimate daily calories using BMR, activity level, and common weight goals.

Estimate body fat percentage from sex, age, height, and weight using a BMI-based screening method.

Estimate basal metabolic rate using age, sex, height, and weight.

Compare common adult ideal weight formulas from sex and height.

Calculate pace, speed, and finish-time relationships for running, walking, or cycling.

Estimate pregnancy week, days pregnant, trimester, and due date from last menstrual period.

Estimate a likely conception date window from due date or last menstrual period.

Estimate pregnancy due date from last menstrual period, conception date, or IVF transfer date.

Solve common percentage problems including percent of, percentage change, and what percent one number is of another.

Use a fast browser-based calculator for arithmetic, powers, roots, trigonometry, and logarithms.

Add, subtract, multiply, or divide fractions and mixed numbers with simplified results.

Generate random integers or decimal numbers inside a chosen range.

Calculate triangle perimeter, area, and angles from three sides or two right-triangle legs.

Calculate mean, variance, sample standard deviation, and population standard deviation from a list of numbers.

Calculate exact age in years, months, and days from a birth date to any selected date.

Count days, weeks, months, and years between two dates.

Add or subtract days, weeks, months, or years from a start date.

Calculate elapsed hours between two times, including overnight shifts.

Add or subtract hours, minutes, and seconds, then convert the result into common time units.

Convert common length, weight, temperature, and volume units in one simple tool.

Generate strong random passwords with length and character options.

Calculate GPA from course credits and grade points using a weighted average.

Calculate a weighted class grade from assignments, exams, and category weights.

Estimate concrete volume and bag count for slabs, pads, and rectangular pours.

Calculate IPv4 network address, broadcast address, subnet mask, and usable host range from CIDR notation.