Calculate how savings or investments can grow over time.

Find simple interest based on principal, rate, and time.

Work out how much to save each month to reach a goal.

Estimate total return and growth from an investment.

Plan how long it may take to pay off debt.

Estimate payoff time and interest for credit card debt.

Compare the annual percentage rate of borrowing.

Convert money values using an exchange rate.

Estimate future savings for retirement planning.

Add, subtract, multiply, and divide fractions.

Simplify ratios or compare values proportionally.

Find mean, median, mode, and range.

Use common scientific operations and functions.

Calculate square roots and related values.

Calculate area for common shapes.

Calculate volume for common 3D shapes.

Estimate how much rent may fit your income.

Estimate how much house you may be able to afford.

Estimate annual property tax from value and rate.

Compare current and new loan payments.

Compare renting and buying costs over time.

Convert meters, feet, inches, miles, and more.

Convert kilograms, pounds, ounces, and more.

Convert liters, gallons, cups, and other volume units.

Convert square meters, square feet, acres, and more.

Convert km/h, mph, m/s, and knots.

Convert seconds, minutes, hours, days, and more.

Convert bytes, KB, MB, GB, and TB.

Find the number of days between two dates.

Calculate elapsed time between two times.

Count days remaining until an important date.

Calculate working days between two dates.

Add or subtract hours and minutes.

Calculate margin, markup, revenue, and profit.

Find the sales needed to break even.

Calculate return on investment.

Calculate sale price, discount amount, and savings.

Calculate markup percentage and selling price.

Convert salary between hourly, monthly, and yearly amounts.

Calculate weighted grades and final scores.

Find the score needed on a final exam.

Plan study hours before an exam or deadline.

Estimate how long a text takes to read.

Estimate flooring material needed for a room.

Estimate concrete volume for a project.

Estimate tiles needed for a surface.

Estimate wallpaper rolls for a room.

Estimate gravel volume and weight.

Find a bedtime or wake-up time based on sleep cycles.

Estimate trip fuel cost from distance and fuel efficiency.

Estimate travel time from distance and speed.

Convert common kitchen measurements.

Split a bill among people quickly.

Count days until the next birthday.

Plan a simple savings challenge.

Estimate pet age in human years.