Every calculator you need — free, instant, no signup

Tip Calculator

Calculate tip amount and split any bill by party size.

Mortgage Calculator

Monthly payment, total interest, and total cost of any home loan.

Compound Interest Calculator

Project future value with compound interest over any period.

Retirement Calculator

Project your savings balance at retirement from monthly contributions.

Salary Calculator

Convert any pay rate to hourly, weekly, monthly, and annual figures.

Discount Calculator

Calculate sale price and total savings from a discount percentage.

ROI Calculator

Calculate total return on investment and annualized CAGR.

Percentage Change Calculator

Calculate percentage increase or decrease between two values.

GPA Calculator

Calculate cumulative GPA from letter grades and credit hours.

Grade Calculator

Calculate final course grade from weighted assignment scores.

Average Calculator

Calculate mean, median, mode, and range from any number list.

Standard Deviation Calculator

Calculate SD, variance, mean, min, and max from a dataset.

Sleep Calculator

Find optimal bedtime or wake time based on 90-minute sleep cycles.

Calorie Deficit Calculator

Daily calorie target and estimated goal date for weight loss.

BMI Calculator

Calculate body mass index from height and weight.

BMR Calculator

Estimate basal metabolic rate using Mifflin-St Jeor formula.

TDEE Calculator

Estimate total daily energy expenditure from BMR and activity.

Ideal Weight Calculator

Estimate ideal weight range from height and sex.

Hours Calculator

Calculate time worked between two times with break deduction.

Days Until Calculator

Count days until any named date — birthday, holiday, or deadline.

Online Stopwatch

Browser-based stopwatch with lap timer.

Productivity

Pomodoro Timer

25-minute focus sessions with automatic break switching.

Productivity

Typing Speed Test

Measure your WPM and accuracy with a live typing test.

Countdown Timer

Calculate time remaining until any target date and time.

Math

Scientific Calculator

Evaluate expressions with sqrt, trig, log, pi, and more.

Design

Aspect Ratio Calculator

Find aspect ratio and scale dimensions from width and height.

Developer

px to rem Converter

Convert between CSS pixel and rem with a custom base size.

Math

Percentage Calculator

Calculate basic percentages instantly.

Age Calculator

Calculate exact age from a birth date.

Loan EMI Calculator

Estimate monthly loan payments and total interest.

Date Difference Calculator

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